Pilot-Scale Slow Pyrolysis, Post-Heat Treatment, and Self-Heating Performance of Biochar Fuels Derived from Construction, Renovation, and Demolition (CRD) Wood Waste

May combine two claims.

The absence of distinct peaks beyond 3020 cm-1 indicates minimal hydrogen-bonded O-H groups and low residual moisture in high-temperature biochars.

“The absence of distinct peaks beyond 3020 cm -1 indicates minimal hydrogenbonded O-H groups and low residual moisture in high-temperature biochars [94,95].”

• cites [94] Luo, 2024, Effects of pyrolysis temperatures on the structural properties of straw biochar and its adsorption of tris-(1-chloro-2-propyl) phosphate, Sci. Rep. sourcePartly supported

  The FTIR discussion in Results and discussion > Properties of biochar (page unavailable) says the O–H peak at 3432 cm−1 weakens as pyrolysis temperature rises and suggests this may result from bound water detaching and hydrogen-bonded hydroxyl groups breaking. It does not report an absence of peaks beyond 3020 cm−1 or establish that residual moisture is low in high-temperature biochars. (LLM, conf=0.87)

  Experimental — accuracy not yet measured
• cites [95] Singh, 2016, A fourier-transform infrared study of biochar aging in soils, Soil Sci. Soc. Am. J. sourceDisputed

  In Results and Discussion, the paper reports a broad band centered at 3400 cm−1 in both biochars, attributed mainly to O–H stretching from sorbed water and hydrous minerals. It also reports a distinct band at 3638 cm−1 in the 550°C biochar. These observations contradict the claimed absence of peaks beyond 3020 cm−1 and do not support the inference of low residual moisture. (LLM, conf=0.88)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Moisture buffers thermal stress by inhibiting oxygen diffusion, though excessive levels risk biological oxidation.

“Moisture buffers thermal stress by inhibiting oxygen diffusion, though excessive levels risk biological oxidation [104,108,114].”

• cites [104] Thauront, 2024, A critical re-analysis of biochar properties prediction from production parameters and elemental analysis, Glob. Change Biol. Bioenergy sourceCould not verify

  Section 3.3 discusses moisture uptake during cooling and storage as a source of error in elemental analysis. The Introduction discusses microbial oxidation in relation to biochar composition, not moisture. Searches for moisture, oxygen diffusion, thermal stress, and biological oxidation found no passage addressing the claimed protective effect or risk from excessive moisture; page numbers were not available in our copy. (LLM, conf=0.72)

  Experimental — accuracy not yet measured
• cites [108] Masek, 2014, Determination of spontaneous ignition behavior of biochar accumulations, Int. J. Sci. Res.Not checked yet

  Not checked in the free run.

• cites [114] Itoh, T., Iwabuchi, K., Maemoku, N., Chen, S., and Taniguro, K. (2020). Role of ambient pressure in self-heating torrefaction of dairy cattle manure. PLoS ONE, 15. sourceDisputed

  In Results and discussion, “Effects of ambient pressure on self-heating of manure” (page unavailable), the paper says retained moisture promotes oxidation and self-heating by facilitating oxygen contact, rather than buffering heating by inhibiting oxygen diffusion. It describes chemical oxidation, not a risk of biological oxidation at excessive moisture levels. (LLM, conf=0.82)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

Smaller particles accelerate oxidation through higher surface area exposure.

“Smaller particles accelerate oxidation through higher surface area exposure [112,113].”

• cites [112] Castells, B., Amez, I., Medic, L., and García Torrent, J. (2020). Particle size influence on the transport classification labels and other flammability characteristics of powders. Appl. Sci., 10. sourceSupported
• cites [113] Preimesberger, 2024, Size-and temperature-dependent oxidative pyrolysis and auto-ignition of spherical beech and spruce wood, Biomass Convers. Biorefin. sourceDisputed

  The Introduction (page unavailable) says surface area and surface-to-volume ratio affect oxidative pyrolysis, but does not say smaller particles accelerate oxidation. The Abstract and Conclusions (pages unavailable) point in the opposite direction for the wood spheres studied: larger samples have more reactive pyrolyzed surface and ignite earlier than smaller ones. (LLM, conf=0.85)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured

May combine two claims.

Oxygen deprivation during pyrolysis can exacerbate reactive functional groups, while low-temperature biochars like B600 retain surface tars that initiate thermal runaway.

“Oxygen deprivation during pyrolysis can exacerbate reactive functional groups, while low-temperature biochars like B600 retain surface tars that initiate thermal runaway [39,110,111].”

• cites [39] Schwarzer, 2021, Self-heating and thermal runaway of biomass–Lab-scale experiments and modeling for conditions resembling power plant mills, Fuel sourceDisputed

  The Experimental section (p. unavailable) reports no relevant self-heating during inert-atmosphere pyrolysis. The Introduction (p. unavailable) instead identifies heterogeneous oxidation of solid biomass as the likely ignition pathway under the conditions studied; the Model parameters section lists tars as pyrolysis products, not initiators of thermal runaway. The paper does not address B600 or changes in reactive functional groups. (LLM, conf=0.78)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured
• cites [110] Evangelista, 2018, Reactor scale study of self-heating and self-ignition of torrefied wood in contact with oxygen, Fuel sourceNot checked — no full text of the source
• cites [111] Riva, 2020, On the self-heating behavior of upgraded biochar pellets blended with pyrolysis oil: Effects of process parameters, Fuel sourcePartly supported

  Section 3.7 reports greater self-heating risk for pellets made with biochar pyrolyzed at 450 °C than at 600 or 750 °C. Section 3.5 also says added pyrolysis oil can make pellets ignite faster. Neither passage attributes that risk to oxygen deprivation, reactive functional groups, or surface tars retained by a material called B600; the oil studied was added as a binder. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

Classified as probably not a substantial claim. May combine two claims.

CRD activities generate large volumes of waste, of which only 20% is recycled, with the rest ending up in landfills, including non-recyclable wood fractions.

“Construction, renovation, and demolition (CRD) activities generate large volumes of waste, of which only 20% is recycled, with the rest ending up in landfills, including nonrecyclable wood fractions such as treated, tinted, and adhesive laden wood, and drywall containing gypsum [1][2][3].”

• cites [1] Maier, D. (2021). Building materials made of wood waste a solution to achieve the sustainable development goals. Materials, 14. sourcePartly supported

  The Introduction describes construction and demolition waste as a large waste stream, and Section 3.4 discusses the disposal of wood waste in landfills. The paper does not give a 20% recycling rate or say that all remaining waste goes to landfills; it also does not identify the specified wood fractions as nonrecyclable. Page numbers are unavailable in our copy. (LLM, conf=0.87)

  Experimental — accuracy not yet measured
• cites [2] Hansen, 2020, Recycled gypsum powder from waste drywalls combined with fly ash for partial cement replacement in concrete, J. Clean. Prod. sourceNot checked — no full text of the source
• cites [3] Laadila, 2021, Construction, renovation and demolition (CRD) wastes contaminated by gypsum residues: Characterization, treatment and valorization, Waste Manag. sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing).

The surface area of 188.33 m2/g may have arisen from gradual volatilization of holocellulose and lignin at the same 4 h BRT, favoring enhanced porosity.

“The surface area of 188.33 m 2 /g may have arisen from gradual volatilization of holocellulose and lignin at the same 4 h BRT, favoring enhanced porosity [72].”

• cites [72] Chatterjee, R., Sajjadi, B., Chen, W.Y., Mattern, D.L., Hammer, N., Raman, V., and Dorris, A. (2020). Effect of pyrolysis temperature on physicochemical properties and acoustic-based amination of biochar for efficient CO2 adsorption. Front. Energy Res., 8. sourcePartly supported

  The section “Effect of Pyrolysis Temperature on Surface Are of Raw Chars” says that lignin degradation and greater devolatilization can create pores and increase surface area. It does not report a surface area of 188.33 m²/g, a 4-hour BRT, or gradual volatilization of holocellulose under that condition; those specific parts of the claim are unsupported. (LLM, conf=0.87)

  Experimental — accuracy not yet measured

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

PHT at 600 °C for 30 min (HTB800) induced a second phase of dehydration, dehydrogenation, and deoxygenation, further concentrating aromatic carbon and reducing chemical instability.

“Further, PHT at 600 • C for 30 min (HTB800) induced a second phase of dehydration, dehydrogenation, and deoxygenation, further concentrating aromatic carbon and reducing chemical instability [73][74][75][76][77].”

• cites [73] Guizani, 2019, The Heat Treatment Severity Index: A new metric correlated to the properties of biochars obtained from entrained flow pyrolysis of biomass, Fuel sourceNot checked — no full text of the source
• cites [74] Woolf, 2021, Greenhouse gas inventory model for biochar additions to soil, Environ. Sci. Technol. sourcePartly supported

  The Results and Discussion section on modeled permanence says higher pyrolysis temperatures increase condensation and links larger aromatic structures with persistence; the Materials and Methods section on permanence likewise says larger aromatic structures are typically more persistent. The paper does not report an HTB800 treatment at 600 °C for 30 minutes, a second processing phase, or the specified dehydration, dehydrogenation, and deoxygenation reactions. Page numbers were not available in our copy. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [75] Aller, 2017, Modified method for proximate analysis of biochars, J. Anal. Appl. Pyrolysis sourceNot checked — no full text of the source
• cites [76] Song, S., Cong, P., Wang, C., Li, P., Liu, S., He, Z., Zhou, C., Liu, Y., and Yang, Z. (2023). Properties of biochar obtained from tropical crop wastes under different pyrolysis temperatures and its application on acidic soil. Agronomy, 13. sourcePartly supported

  Section 3.4 reports that higher pyrolysis temperatures reduced hydrogen- and oxygen-containing functional groups through dehydration and deoxygenation. But Section 2.2 describes treatment at 300, 500, or 700 °C for two hours, not HTB800 treated at 600 °C for 30 minutes. The copy does not establish a second reaction phase or reduced chemical instability for that treatment. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [77] Brumm, 2021, Fast pyrolysis biochar flammability behavior for handling and storage, ACI Av. Cienc. E Ing.Not checked yet

  Not checked in the free run.

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

Increasing pyrolysis temperature to 800 °C drove further deoxygenation and dehydrogenation, with Van Krevelen parameters H/C = 0.21 and O/C = 0.05.

“Increasing pyrolysis temperature to 800 • C via B800 drove further deoxygenation and dehydrogenation, with Van Krevelen parameters (H/C = 0.21; O/C = 0.05) confirming heightened aromaticity and carbon enrichment [69,70].”

• cites [69] Wijitkosum, 2023, Influence of pyrolysis temperature and time on biochar properties and its potential for climate change mitigation, J. Hum. Earth Future sourcePartly supported

  The Chopstick Waste section reports that increasing pyrolysis temperature lowered H/C and O/C ratios, indicating greater aromaticity and carbon enrichment. However, Methods §2.2 says the study tested only 400, 450, and 500 °C; Table 6 reports O/C = 0.05 at 500 °C, paired with H/C = 0.45, not 0.21. It does not support the claimed B800 condition or its paired ratios. (LLM, conf=0.89)

  Experimental — accuracy not yet measured
• cites [70] Wystalska, K., and Kwarciak-Kozłowska, A. (2021). The effect of biodegradable waste pyrolysis temperatures on selected biochar properties. Materials, 14. sourcePartly supported

  The Conclusions report that increasing temperature raised carbon content and lowered hydrogen content, and Results §3.2 links a falling H/C ratio to increased aromaticity. But Methods §2.2 lists pyrolysis temperatures only up to 700 °C. The paper therefore does not support the claimed B800 result or its H/C = 0.21 and O/C = 0.05 values; page numbers are unavailable in our copy. (LLM, conf=0.89)

  Experimental — accuracy not yet measured

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

HTB800 had a surface area of 202.09 m2/g, a gain of 7.3%.

“The elevated pH of 9.3 reflects progressive loss of acidic surface functionalities, while the HHV of 31.49MJ/kg and surface area gain to 202.09 m 2 /g (+7.3%) reinforce suitability for energy and metallurgical applications [74][75][76][77].”

• cites [74] Woolf, 2021, Greenhouse gas inventory model for biochar additions to soil, Environ. Sci. Technol. sourceCould not verify

  The Results and Discussion section reports modeled biochar carbon fractions by feedstock and production temperature, not surface-area measurements for HTB800. Searches for HTB800, 202.09 m²/g, and a 7.3% surface-area gain found no passage addressing the attributed measurement in our copy (page numbers unavailable). (LLM, conf=0.76)

  Experimental — accuracy not yet measured
• cites [75] Aller, 2017, Modified method for proximate analysis of biochars, J. Anal. Appl. Pyrolysis sourceNot checked — no full text of the source
• cites [76] Song, S., Cong, P., Wang, C., Li, P., Liu, S., He, Z., Zhou, C., Liu, Y., and Yang, Z. (2023). Properties of biochar obtained from tropical crop wastes under different pyrolysis temperatures and its application on acidic soil. Agronomy, 13. sourceCould not verify

  Section 3.2 reports surface areas for biochars produced at 300, 500, and 700 °C, but it does not identify HTB800 or report 202.09 m²/g or a 7.3% gain. Searches for “HTB800 202.09” and “202.09 surface area 800 °C” found no matching passage in our copy. Page numbers were not available. (LLM, conf=0.78)

  Experimental — accuracy not yet measured
• cites [77] Brumm, 2021, Fast pyrolysis biochar flammability behavior for handling and storage, ACI Av. Cienc. E Ing.Not checked yet

  Not checked in the free run.

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

Increased heat treatment severity and devolatilization led to more micropore formation with reduced meso- and macropores, alongside shrinkage and volume reduction.

“Increased heat treatment severity and devolatilization led to more micropore formation with reduced meso-and macropores, alongside shrinkage and volume reduction [79].”

• cites [79] Dufourny, 2019, Influence of pyrolysis conditions and the nature of the wood on the quality of charcoal as a reducing agent, J. Anal. Appl. Pyrolysis sourcePartly supported

  Section 3.4.1 reports earlier findings of reduced charcoal volume and smaller pores at higher pyrolysis temperatures, which partly supports the claim. But the paper does not establish increased micropores or reduced meso- and macropores; Section 3.2 reports that overall porosity increased from 500 to 800 °C. It also describes volatile release producing large cracks and voids in eucalyptus charcoal, rather than a general reduction in large pores. (LLM, conf=0.85)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

Slagging occurs when elevated temperatures melt ash constituents into glassy, clinker-like residues that are difficult to remove.

“Slagging occurs when elevated temperatures melt ash constituents into glassy, clinker-like residues that are difficult to remove [81].”

• cites [81] Smith, 2018, The potential for production of high quality bio-coal from early harvested Miscanthus by hydrothermal carbonisation, Fuel sourceSupported

May combine two claims.

Heterogeneous CRD wood with high holocellulose and low lignin promotes tar and gas formation, reducing FC and chemical stability.

“Heterogeneous CRD wood with high holocellulose and low lignin promotes tar and gas formation, reducing FC and chemical stability [105][106][107].”

• cites [105] Zhao, 2013, Heterogeneity of biochar properties as a function of feedstock sources and production temperatures, J. Hazard. Mater. sourcePartly supported

  Section 3.1 (page not provided) reports that feedstock source affects biochar fixed carbon, which supports the general feedstock-related part of the claim. It does not establish that CRD wood has high holocellulose and low lignin or that this composition promotes tar and gas formation, reducing fixed carbon. Section 3.2 (page not provided) instead identifies production temperature as the dominant control on biochar recalcitrance. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [106] Font, 2020, Analysis of the spontaneous combustion and self-heating of almond shells, Fuel sourceNot checked — no full text of the source
• cites [107] Ashman, 2018, Some characteristics of the self-heating of the large scale storage of biomass, Fuel Process. Technol. sourceCould not verify

  The Laboratory Studies section (p. 9) discusses decomposition of hemicellulose in wood, and Materials Used (p. 3) lists fixed carbon for typical wood pellets. Neither passage links heterogeneous CRD wood or high holocellulose and low lignin to increased tar and gas formation, reduced fixed carbon, or reduced chemical stability; searches for those terms found no passage establishing that relationship. (LLM, conf=0.75)

  Experimental — accuracy not yet measured

May combine two claims.

The gradual approach is consistent with reduced VC, elevated FC, TSF, and R50, and progressive deoxygenation and aromatization confirmed by FTIR signals between 1280 and 1610 cm-1.

“This is consistent with its reduced VC, elevated FC, TSF, and R50, and progressive deoxygenation and aromatization confirmed by FTIR signals between 1280 and 1610 cm -1 [104].”

• cites [104] Thauront, 2024, A critical re-analysis of biochar properties prediction from production parameters and elemental analysis, Glob. Change Biol. Bioenergy sourcePartly supported

  Section 3.2 links the extent of pyrolysis to volatile matter and to more aromatic, reduced biochar, supporting part of the claim. The paper does not establish elevated fixed carbon, TSF or R50 for the material in question, or report FTIR signals at 1280–1610 cm⁻¹ as confirmation. Page numbers were not available in our copy. (LLM, conf=0.86)

  Experimental — accuracy not yet measured

May combine two claims.

High pyrolysis temperatures and BRT reduce VC and reactivity.

“High pyrolysis temperatures and BRT reduce VC and reactivity [79,108,109].”

• cites [79] Dufourny, 2019, Influence of pyrolysis conditions and the nature of the wood on the quality of charcoal as a reducing agent, J. Anal. Appl. Pyrolysis sourcePartly supported

  Section 3.1 reports that volatile-matter content falls as pyrolysis temperature and solid residence time increase. Section 3.5 reports lower CO₂ reactivity at higher temperatures, but the residence-time effect was significant only for spruce charcoal at 800 °C; no significant effect was observed for eucalyptus charcoal. The claim overgeneralizes the effect of residence time on reactivity. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [108] Masek, 2014, Determination of spontaneous ignition behavior of biochar accumulations, Int. J. Sci. Res.Not checked yet

  Not checked in the free run.

• cites [109] Phounglamcheik, 2020, Effects of pyrolysis conditions and feedstocks on the properties and gasification reactivity of charcoal from woodchips, Energy Fuels sourcePartly supported

  The Conclusions report that increasing pyrolysis temperature produced less-reactive charcoal through greater devolatilization, and that slow heating produced less-reactive charcoal. The Introduction says low-heating-rate charcoal has lower volatile content, but the paper does not establish that increasing BRT itself reduces both volatile content and reactivity; its comparison is primarily between heating rates. (LLM, conf=0.85)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

Square basket geometry ensured uniform oxygen permeation per protocol.

“Square basket geometry ensured uniform oxygen permeation per protocol [117].”

• cites [117] Restuccia, F. (2017). Self-Heating Ignition of Natural Reactive Porous Media. [Doctoral Dissertation, Imperial College London]. sourcePartly supported

  The passage accompanying Fig. 4 (indexed under 6. Conclusions; page unavailable) says the shale was packed in cubic wire-mesh baskets following a procedure similar to British Standard EN 15188:2007. It says the different basket sizes were chosen to study critical sizes, not that their geometry ensured uniform oxygen permeation. Section 3 describes forced air circulation to prevent temperature stratification, but does not establish uniform oxygen permeation. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

May combine two claims.

Packed volumes amplify heat build-up, yet this effect is secondary to biochar properties-B800 and HTB800 fines at full basket volume still passed.

“Packed volumes amplify heat build-up, yet this effect is secondary to biochar properties-B800 and HTB800 fines at full basket volume still passed [115,116].”

• cites [115] Wei, J., Yao, C., and Sheng, C. (2023). Modelling Self-Heating and Self-Ignition Processes during Biomass Storage. Energies, 16. sourcePartly supported

  Section 3.4 (page unavailable) links biomass properties, particularly thermal conductivity, to heat accumulation and self-ignition. But the paper does not establish that packed-volume effects are secondary to biochar properties. Section 2.3 (page unavailable) describes tests of fir pellets and powder, not B800 or HTB800 fines, and reports no full-basket-volume pass result for them. (LLM, conf=0.78)

  Experimental — accuracy not yet measured
• cites [116] Krigstin, S., Wetzel, S., Jayabala, N., Helmeste, C., Madrali, S., Agnew, J., and Volpe, S. (2018). Recent health and safety incident trends related to the storage of woody biomass: A need for improved monitoring strategies. Forests, 9. sourcePartly supported

  The Introduction describes hazardous self-heating in large biomass piles, and §4.2 says compaction can influence pile temperature. The paper does not establish that volume is secondary to biochar properties or report basket tests of B800 and HTB800 fines; no page numbers were available in our copy. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

The observed morphologies may also have occurred through structural reorganization of unconverted biomass, in which thin fragile walls between adjacent micropores collapse under thermal stress, causing pore coalescence from internal overpressure.

“It may have also occurred through structural reorganization of unconverted biomass where thin fragile walls between adjacent micropores collapse under thermal stress causing pore coalescence from internal overpressure [124,125].”

• cites [124] Shafiq, 2021, Effect of different temperatures on the properties of pyrolysis products of Parthenium hysterophorus, J. Saudi Chem. Soc. sourcePartly supported

  Section 3.5 (SEM; page not provided) attributes the porous morphology to disorganization and re-orientation of plant biochemicals, supporting the broad idea of structural reorganization. It does not describe fragile walls collapsing under thermal stress or pore coalescence caused by internal overpressure; Section 3.2 instead links greater porosity to volatile loss at higher temperatures. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [125] Jerzak, 2022, Estimation of the heat required for intermediate pyrolysis of biomass, Clean Technol. Environ. Policy sourcePartly supported

  Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

  Experimental — accuracy not yet measured

May combine two claims. The quote only partly states this claim.

Post-heat treatment at 600 °C for 30 min of B800 further enhanced aromaticity, with H/C = 0.18 and O/C = 0.02.

“Post-heat treatment further enhanced aromaticity (H/C = 0.18; O/C = 0.02) of this higher pyrolysis temperature biochar, increasing its fixed carbon and stability, and reducing volatile content.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

SEM and EDX analyses confirmed structural evolution, increased carbon content, reduced oxygen, suppressed alkali metals, and enrichment of alkaline earth metals.

“SEM and EDX analyses confirmed this structural evolution, increased carbon content, reduced oxygen, suppressed alkali metals, and enrichment of alkaline earth metals.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

The B800 biochar had H/C ratio 0.21 and O/C ratio 0.05.

“Van Krevelen ratios (H/C = 0.21; O/C = 0.05) indicated enhanced carbon stability, with the higher heating value reaching 30.81MJ/kg.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

Pyrolysis at 800 °C decreased biochar oxygen content to 5.91% and hydrogen content to 1.52%.

“Increasing the pyrolysis temperature to 800 • C increased carbon content from 49.88% in the raw feedstock to 85.11% in biochar, while oxygen and hydrogen contents decreased to 5.91% and 1.52%, respectively.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims. The quote only partly states this claim.

Post-heat treatment at 600 °C for 30 min of B800 increased its fixed carbon and stability and reduced its volatile content.

“Post-heat treatment further enhanced aromaticity (H/C = 0.18; O/C = 0.02) of this higher pyrolysis temperature biochar, increasing its fixed carbon and stability, and reducing volatile content.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

Biochar yields were 30% for B600 and 25% for B800.

“Biochar yields were 30% (B600) and 25% (B800), respectively.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

HTB800 had improved Van Krevelen parameters H/C 0.18 and O/C 0.02 and a 9.7% TSF gain.

“This is evidenced by improved Van Krevelen parameters (H/C 0.18; O/C 0.02) and a 9.7% TSF gain, confirming well-ordered, thermally stable aromatic structures.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

May combine two claims.

At 600 °C, fixed carbon stabilized alongside early aromatic structure formation, with a TSF of 70.96%.

“At 600 • C, FC stabilized alongside early aromatic structure formation, with a TSF of 70.96% confirming meaningful thermal conversion.”

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

CRD wood's AAEM is reportedly ~60% Ca, Mg, and Ba, suggesting some inherent slagging resistance.

“CRD wood's AAEM is reportedly ~60% Ca, Mg, and Ba, suggesting some inherent slagging resistance.”

May combine two claims.

B600 exhibits properties comparable to metallurgical coal, with slightly higher oxygen content and O/C ratio.

“From Table 1, B600, with slightly higher oxygen content and O/C ratio, exhibits properties comparable to metallurgical coal”

May combine two claims.

Coke remains superior to HTB800 in lower volatile content, higher FC, and thermal stability (via TSF).

“Coke also remains superior in terms of lower volatile content, higher FC, and thermal stability (via TSF).”

May combine two claims.

HTB800 contains more oxygen and a higher O/C than coke.

“However, HTB800 contains more oxygen and a higher O/C than coke.”

May combine two claims.

AAEM dominated CRD wood metal content (87%), with alkaline earth metals (Ca, Mg, Ba) accounting for ~60% and alkali metals (K, Na) ~27%.

“AAEM dominated CRD wood metal content (87%), with alkaline earth metals (Ca, Mg, Ba) accounting for ~60% and alkali metals (K, Na) ~27%.”

May combine two claims.

There was a 78% reduction in AAEM in B600 and 85% in B800.

“There was a 78% reduction in AAEM in B600 and 85% in B800”

May combine two claims.

R50 increased from 0.52 (B600) to 0.57 (B800) and 0.58 (HTB800), placing all biochars within Class B (0.5 ≤ R50 < 0.7).

“From Figure 3C, R50 increased from 0.52 (B600) to 0.57 (B800) and 0.58 (HTB800), placing all biochars within Class B (0.5 ≤ R50 < 0.7) according to the analysis procedure fully compliant with [63].”

• cites [63] Harvey, 2012, An index-based approach to assessing recalcitrance and soil carbon sequestration potential of engineered black carbons (biochars), Environ. Sci. Technol. sourceNot checked — no full text of the source

May combine two claims.

R50 and TSF correlated positively with FC and negatively with H/C, O/C, and VC.

“R50 and TSF correlated positively with FC and negatively with H/C, O/C, and VC”

May combine two claims.

C≡C stretching (2100-2260 cm-1) peaks in HTB800, confirming a positive relationship between heat treatment intensity and multi-aromatics development.

“C≡C stretching (2100-2260 cm -1 ) peaks in HTB800, confirming a positive relationship between heat treatment intensity and multi-aromatics development.”

May combine two claims.

Aromatic C-H bending (700-840 cm-1) and O-H vibrations in metal/mineral-O-H linkages (800-940 cm-1) were present across all samples.

“Aromatic C-H bending (700-840 cm -1 ) and O-H vibrations in metal/mineral-O-H linkages (800-940 cm -1 ) were present across all samples”

May combine two claims.

Diminishing peak intensity in the 1020-1280 cm-1 zone indicates progressive loss of polysaccharide-associated C-O and C-OH functionalities, with near-absent signals in B800 and HTB800 consistent with advanced decarboxylation, decarbonylation, and cracking reactions.

“Diminishing peak intensity in the 1020-1280 cm -1 zone indicates progressive loss of polysaccharide-associated C-O and C-OH functionalities, with near-absent signals in B800 and HTB800 consistent with advanced decarboxylation, decarbonylation, and cracking reactions.”

May combine two claims.

EDX confirmed a reduction in oxidative surface groups in HTB800, supporting PHT's role in enhancing stability with minimal chemical intervention.

“EDX confirmed a reduction in oxidative surface groups in HTB800 (Figure 6 (bottom)), supporting PHT's role in enhancing stability with minimal chemical intervention.”

May combine two claims.

In Test 2, dried B800 lumps (<1% moisture) reached oven temperature (~140°C) within 2.5 h before stabilizing, with moisture-enhanced lumps (20-25%) showing delayed oxidation through oxygen diffusion blockage.

“In Test 2, dried lumps (<1% moisture) reached oven temperature (~140 • C) within 2.5 h before stabilizing, with moisture-enhanced lumps (20-25%) showing delayed oxidation through oxygen diffusion blockage [101].”

• cites [101] Miura, 2016, Adsorption of water vapor from ambient atmosphere onto coal fines leading to spontaneous heating of coal stockpile, Energy Fuels sourceNot checked — no full text of the source

May combine two claims.

When B600 lumps as is (<5% intrinsic moisture) occupied half the steel basket volume, the self-heating test showed an exponential trend and smoldering occurred.

“when biochar lumps as is (<5% intrinsic moisture) occupied half the steel basket volume, the self-heating test showed an exponential trend and smoldering occurred”

May combine two claims.

Due to the long BRT and controlled heating rate, no sudden intra-particle explosions occurred, resulting in non-widened pore sizes.

“Due to the long BRT and controlled heating rate, no sudden intra-particle explosions occurred, resulting in non-widened pore sizes.”

May combine two claims.

Adding 20-25% moisture to B600 lumps did not prevent ignition but merely delayed heat absorption, with B600 still approaching the ignition threshold at around 4.5 h.

“Adding 20-25% moisture to these biochar lumps did not prevent ignition but merely delayed heat absorption, with B600 still approaching the ignition threshold at around 4.5 h”

May combine two claims.

B800 passed under both moisture extremes, confirming that physicochemical properties govern self-heating behavior more decisively than moisture content alone.

“B800 passed under both moisture extremes, confirming that physicochemical properties govern self-heating behavior more decisively than moisture content alone.”

May combine two claims.

Biochar yield loss after PHT ranged from 14 to 21 wt%, peaking at 90 min, and was strongly correlated with PHT time (r = 0.98).

“Biochar yield loss after PHT ranged from 14 to 21 wt%, peaking at 90 min, reflecting volatilization and thermal breakdown of carbon into gases, tars, and VOCs, and was strongly correlated with PHT time (r = 0.98).”

May combine two claims.

Surface areas were consistent with co-pyrolysis air activation results from [120] (110 to 330 m2/g), though no air was used in our study.

“Surface areas were consistent with co-pyrolysis air activation results from [120] (110 to 330 m 2 /g), though no air was used in our study.”

• cites [120] Kearns, 2019, High temperature co-pyrolysis thermal air activation enhances biochar adsorption of herbicides from surface water, Environ. Eng. Sci. sourceNot checked — no full text of the source

May combine two claims.

R50 increased from 0.596 (30 min) to 0.659 (90 min), confirming that carbon maturity scales with PHT duration.

“R50 increased from 0.596 (30 min) to 0.659 (90 min), confirming that carbon maturity scales with PHT duration (Figure 10C).”

May combine two claims.

In both rounds, similar trends were observed for VC, ash, and FC, with longer residence times promoting steady decomposition, carbon reinforcement, and microporosity development.

“In both rounds, similar trends were observed for VC, ash, and FC, with longer residence times promoting steady decomposition, carbon reinforcement, and microporosity development [93].”

• cites [93] Sajjadi, 2019, A comprehensive review on physical activation of biochar for energy and environmental applications, Rev. Chem. Eng. sourceNot checked — no full text of the source

May combine two claims.

VC decreased by ~11% between 30 and 90 min in the first round and ~17% in the second.

“VC decreased by ~11% between 30 and 90 min in the first round and ~17% in the second”

May combine two claims.

Ash increased steadily by a magnitude of 15.2% in the first round and 14.8% in the second, tracking inversely with VC decline.

“Ash increased steadily by a magnitude of 15.2% in the first round and 14.8% in the second, tracking inversely with VC decline.”

May combine two claims.

FTIR analysis of B800 after PHT between 30 and 90 min showed consistent aromatic C-H bending (700-840 cm-1) across all PHT durations, with progressively reduced C-O carbohydrate intensities (1020-1280 cm-1).

“the FTIR analysis of B800 after PHT between 30 and 90 min showed consistent aromatic C-H bending (700-840 cm -1 ) across all PHT durations, with progressively reduced C-O carbohydrate intensities (1020-1280 cm -1 )”

May combine two claims.

Surface oxygen was limited to 4.9% at 60 min PHT with an even lower concentration of 4.1% at 90 min.

“Surface oxygen was limited to 4.9% at 60 min PHT with an even lower concentration of 4.1% at 90 min”

May combine two claims.

Low-temperature biochar failed unconditionally while high-temperature and PHT-treated biochars passed under all conditions tested.

“Low-temperature biochar failed unconditionally while high-temperature and PHT-treated biochars passed under all conditions tested.”

May combine two claims.

Slow pyrolysis maximizes solid biochar yield relative to gasification or combustion while operating at moderate temperatures compatible with pilot-scale sealed retort systems.

“This study focuses exclusively on slow pyrolysis, which maximizes solid biochar yield relative to gasification or combustion while operating at moderate temperatures compatible with pilot-scale sealed retort systems [6,7].”

• cites [6] Akhtar, 2018, A combined overview of combustion, pyrolysis, and gasification of biomass, Energy Fuels sourceNot checked — no full text of the source
• cites [7] Ram, M., and Mondal, M.K. (2022). Chapter 12—Biomass Gasification: A step toward cleaner fuel and chemicals. Biofuels and Bioenergy—Opportunities and Challenges, Elsevier. sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing).

Pyrolysis can stabilize heavy metals into mineral complexes within the biochar matrix, reducing their mobility relative to the raw feedstock.

“Pyrolysis can also stabilize heavy metals into mineral complexes within the biochar matrix, reducing their mobility relative to the raw feedstock [5].”

• cites [5] Basu, P. (2018). Biomass Gasification, Pyrolysis and Torrefaction: Practical Design and Theory, Academic Press. sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Each self-heating test was done as triplicates and the mean/average readings are reported.

“Each test was done as triplicates and the mean/average readings are reported.”

• AssumptionRests on an assumption: The minor adjustment to the UN 33.4.6 self-heating test duration does not affect the validity of the pass/fail classification.

Classified as probably not a substantial claim.

Self-heating propensity was evaluated using basket heating tests in thermostatically controlled adiabatic ovens, following the UN 33.4.6 method with a minor adjustment to test duration.

“Self-heating propensity was evaluated using basket heating tests in thermostatically controlled adiabatic ovens, following the UN 33.4.6 method with a minor adjustment to test duration (Supplementary Figure S3).”

• cites UN 33.4.6Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

• AssumptionRests on an assumption: The minor adjustment to the UN 33.4.6 self-heating test duration does not affect the validity of the pass/fail classification.

May combine two claims.

Low-temperature biochars have poor oxidative stability due to high volatiles, while high temperatures improve stability but may increase oxygen adsorption and exothermicity due to enhanced microporosity.

“Low-temperature biochars have poor oxidative stability due to high volatiles, while high temperatures improve stability but may increase oxygen adsorption and exothermicity due to enhanced microporosity [23,28].”

• cites [23] Phounglamcheik, A., Johnson, N., Kienzl, N., Strasser, C., and Umeki, K. (2022). Self-Heating of Biochar during Postproduction Storage by O2 Chemisorption at Low Temperatures. Energies, 15. sourceNot checked — no full text of the source
• cites [28] Pariyar, 2020, Evaluation of change in biochar properties derived from different feedstock and pyrolysis temperature for environmental and agricultural application, Sci. Total Environ. sourceNot checked — no full text of the source

May combine two claims.

Heat treatment reduces volatile carbon, increases fixed carbon, porosity, surface area, and oxidative stability.

“Heat treatment reduces volatile carbon (VC), increases fixed Carbon (FC), porosity, surface area, and oxidative stability [46].”

• cites [46] Tang, 2013, Characteristics of biochar and its application in remediation of contaminated soil, J. Biosci. Bioeng. sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

The feasibility of producing biochar from furniture wood waste was demonstrated, suggesting applicability to other CRD wood streams.

“As per [8], the feasibility of producing biochar from furniture wood waste was demonstrated, suggesting applicability to other CRD wood streams.”

• cites [8] Özbay, G., Özçifçi, A., Toker, E.S.K.H., and Baysal, E. (2015). Bio-char Production from Pyrolysis of Furniture Products Waste, ResearchGate.Not checked yet

  Not checked in the free run.

Probably not a substantial claim: may not pass S3 (load-bearing).

In pyrolysis, parameters such as temperature, heating rate, particle size, and biomass residence time influence biochar's carbon content and reactivity.

“In pyrolysis, parameters such as temperature, heating rate, particle size, and biomass residence time (BRT) influence biochar's carbon content and reactivity [11].”

• cites [11] Sakhiya, A.K., Baghel, P., Pathak, S., Vijay, V.K., and Kaushal, P. (2020). Effect of process parameters on slow pyrolysis of rice straw: Product yield and energy analysis. 2020 International Conference and Utility Exhibition on Energy, Environment and Climate Change (ICUE), IEEE. sourceNot checked — no full text of the source

May combine two claims.

The higher HHV of B800 relative to CRD wood reflects concentration of energy-dense C-C and C-H bonds, supporting its use as a fuel substitute.

“The higher HHV relative to CRD wood reflects concentration of energy-dense C-C and C-H bonds, supporting its use as a fuel substitute [71].”

• cites [71] Maaoui, 2023, Assessment of pine wood biomass wastes valorization by pyrolysis with focus on fast pyrolysis biochar production, J. Energy Inst. sourceNot checked — no full text of the source

• AssumptionRests on an assumption: The CRD wood feedstock used is representative of the broader non-recyclable CRD wood waste stream.

Probably not a substantial claim: may not pass S3 (load-bearing).

Each pyrolysis condition (600 °C and 800 °C) was conducted as a single production batch due to equipment availability and feedstock supply constraints.

“Due to equipment availability and feedstock supply constraints at the pilot facility, each pyrolysis condition (600 • C and 800 • C) was conducted as a single production batch.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

All metal measurements were performed in analytical triplicate per sample, with relative standard deviations within ±10% for AAEM elements and ±15% for trace heavy metals.

“All measurements were performed in analytical triplicate per sample.Relative standard deviations were within ±10% for AAEM elements and ±15% for trace heavy metals.”

May combine two claims.

CRD wood biochar produced at high temperatures exhibits properties approaching metallurgical coal, supporting use as a carbon reductant substitute.

“CRD wood biochar produced at high temperatures exhibits properties approaching metallurgical coal, supporting use as a carbon reductant substitute [52].”

• cites [52] Pandit, J.K., Watson, M., and Qader, A. (2025, May 01). Reduction of Greenhouse Gas Emissions in Steel Production. NSW Department of Primary Industries, Available online: https://www.resourcesregulator.nsw.gov.au/sites/default/files/2022-11/report-reduction-of-ghg-emissions-in-steel-industries.pdf.Not checked yet

  Not checked in the free run.

May combine two claims.

Spike recovery tests using a certified multi-element standard solution were performed at two concentration levels, with recovery rates within 90-115% for all reported elements, confirming acceptable analytical accuracy.

“Spike recovery tests using a certified multi-element standard solution were performed at two concentration levels.The recovery rates fell within 90-115% for all reported elements, confirming acceptable analytical accuracy.”

Classified as probably not a substantial claim.

The biochar designations B600 and B800 are retained as furnace set-point identifiers because sustained measurement of internal retort temperature is not practical in the pilot-scale configuration.

“The biochar designations B600 and B800 are, therefore, retained as furnace set-point identifiers, where sustained measurement of internal retort temperature is not practical in the above situation.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Biochars with H/C < 0.7 and O/C < 0.6 have a half-life of at least 100 years, while O/C < 0.2 extends this to over 1000 years.

“Biochars with H/C < 0.7 and O/C < 0.6 have a half-life of at least 100 years, while O/C < 0.2 extends this to over 1000 years [21].”

• cites [21] Howell, 2022, Stable polycyclic aromatic carbon (SPAC) formation in wildfire chars and engineered biochars, Sci. Total Environ. sourceNot checked — no full text of the source

May combine two claims.

To our knowledge no study has simultaneously characterized pilot-scale CRD wood pyrolysis across multiple temperatures, applied thermal-only post-heat treatment without chemical or reactive gas activation, and assessed self-heating behavior of the resulting biochars, accompanied by relevant characterizations.

“Building on the pilot-scale methodology established in [53], to our knowledge no study has simultaneously characterized pilot-scale CRD wood pyrolysis across multiple temperatures, applied thermal-only post-heat treatment without chemical or reactive gas activation, and assessed self-heating behavior of the resulting biochars, accompanied by relevant characterizations.”

• cites [53] Ganesan, 2025, Pyrolytic conversion of construction, renovation, and demolition (CRD) wood wastes in Québec to biochar: Production, characterization, and identifying relevant stability indices for carbon sequestration, Sci. Total Environ. sourceNot checked — no full text of the source

Classified as probably not a substantial claim.

Cr and Cu concentrations have direct consequences for energy use.

“Cr and Cu concentrations have direct consequences for energy use.”

May combine two claims.

Secondary char formation is rich in volatiles originating from cracking tarry compounds or condensed volatiles, contributing to oxidative instability and self-heating risks.

“While secondary char formation can enhance biochar yield, it is rich in volatiles originating from cracking tarry compounds or condensed volatiles, contributing to oxidative instability and self-heating risks.”

May combine two claims.

The presence of AAEM in CRD wood can lead to reactor slagging, fouling, and bed agglomeration.

“The presence of AAEM in CRD wood can lead to reactor slagging, fouling, and bed agglomeration as illustrated in Supplementary Figure S6.”

May combine two claims.

Under prolonged BRT, metals in CRD wood biomass can alter reaction pathways, increase gas production, and induce secondary char formation during pyrolysis.

“These metals interact with biomass carbon and under prolonged BRT could alter reaction pathways, increase gas production, and induce secondary char formation during pyrolysis [80].”

• cites [80] Changi, 2015, Hydrothermal reactions of biomolecules relevant for microalgae liquefaction, Ind. Eng. Chem. Res. sourceNot checked — no full text of the source

May combine two claims.

B800 is a stronger, sustainable substitute for metallurgical coal.

“making it a stronger, sustainable substitute.”

May combine two claims.

K and Na bring down ash melting temperatures, promoting clinker formation, while Ca, Ba, and Mg counteract this by elevating melting points.

“K and Na bring down ash melting temperatures, promoting clinker formation, while Ca, Ba, and Mg counteract this by elevating melting points [82].”

• cites [82] Koppejan, J., and Van Loo, S. (2012). The Handbook of Biomass Combustion and Co-Firing, Routledge. sourceNot checked — no full text of the source

May combine two claims.

The reduced weight loss reflects advanced carbonisation and depleted VC relative to biomass.

“reflecting advanced carbonisation and depleted VC relative to biomass.”

Probably not a substantial claim: may not pass S3 (load-bearing).

The marginal R50 increase, despite substantial improvement in H/C and O/C, reflects a known sensitivity limitation.

“The marginal R50 increase, despite substantial improvement in H/C (from 1.83 in biomass to 0.21 in B800) and O/C (from 0.63 to 0.05), reflects a known sensitivity limitation”

Probably not a substantial claim: may not pass S3 (load-bearing).

The absence of bed agglomeration is unsurprising given that no bed material or heat carriers were employed.

“which is unsurprising given that no bed material or heat carriers were employed.”

May combine two claims.

Self-heating propensity is governed by feedstock composition, pyrolysis conditions, moisture content, storage volume, and particle size (non-exhaustive).

“Self-heating propensity is governed by feedstock composition, pyrolysis conditions, moisture content, storage volume, and particle size (non-exhaustive).”

Probably not a substantial claim: may not pass S3 (load-bearing).

Glossy indentations across HTB800 may represent desorbed inorganic elements.

“Glossy indentations across HTB800 may represent desorbed inorganic elements.”

May combine two claims.

In HTB800, PHT facilitated gas escape, volatilization of weak organics, and densification of microporosity, forming interconnected porous structures amid graphitized carbon.

“In HTB800, PHT facilitated gas escape (e.g., CO 2 , CO, CH 4 , H 2 O), volatilization of weak organics, and densification of microporosity, forming interconnected porous structures [Figure 5F] amid graphitized carbon, consistent with [98].”

• cites [98] Ma, 2016, Study of biochar properties by scanning electron microscope–energy dispersive X-ray spectroscopy (SEM-EDX), Commun. Soil Sci. Plant Anal. sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing).

Direct cross-tier comparison of self-heating propensity is not made.

“The two tiers address different assessment objectives and direct cross-tier comparison of self-heating propensity is not made.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Self-heating tests were conducted in triplicate.

“across triplicate basket heating tests.”

Classified as probably not a substantial claim. May combine two claims.

B800 results at 140°C can be compared to B600, while HTB800 results at 120°C represent an independent, more stringent assessment of long-term safe storability.

“B800 results at 140 • C can be compared to B600, while HTB800 results at 120 • C represent an independent, more stringent assessment of long-term safe storability.”

May combine two claims.

The more pronounced failure at full basket volume indicates only a minor delay in heat conductivity but similar terminal outcomes.

“indicating only a minor delay in heat conductivity but similar terminal outcomes.”

Probably not a substantial claim: may not pass S3 (load-bearing).

The minimum testable particle size (~500 μm) precluded assessment of finer fractions (1-100 μm).

“The minimum testable particle size (~500 µm) precluded assessment of finer fractions (1-100 µm)”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Advanced characterizations (TGA/DTG/R50, FTIR, SEM-EDX) are reported for the first PHT run only, as the trends were consistent across both runs.

“Advanced characterizations (TGA/DTG/R50, FTIR, SEM-EDX) are reported for the first PHT run only, as the trends were consistent across both runs.”

May combine two claims.

The convergence of surface area decline beyond 75 min and yield loss exceeding 20% at 90 min establishes 75 min as the empirical optimum for this system at 600°C.

“The convergence of two independent indicators, i.e., surface area decline beyond 75 min, and yield loss exceeding 20% at 90 min, establishes 75 min as the empirical optimum for this system at 600 • C.”

May combine two claims.

The FC increase supports gradual stacking of condensed aromatics, also explaining the rise in TSF from 81% to 85% with a highly positive correlation with PHT time (r = 0.98).

“supporting gradual stacking of condensed aromatics, also explaining the rise in TSF from 81% to 85% with a highly positive correlation with PHT time (r = 0.98).”

May combine two claims.

The surface area increase could be attributed to three non-exclusive in situ mechanisms: thermal decomposition of residual oxygen-containing volatile groups, AAEM-catalyzed carbon gasification by K and Na salts above 500°C, and potential trace oxygen ingress through imperfect pilot-scale retort sealing.

“This surface area increase could be attributed to three non-exclusive in situ mechanisms: (i) thermal decomposition of residual oxygen-containing volatile groups releasing CO and CO 2 through decarboxylation; (ii) AAEM-catalyzed carbon gasification by K and Na salts above 500 • C even under inert atmospheres; and (iii) potential trace oxygen ingress through imperfect pilot-scale retort sealing, wh”

May combine two claims.

The collapse indicates progressive aromatic condensation and elimination of lower-stability carbon fractions.

“indicating progressive aromatic condensation and elimination of lower-stability carbon fractions (Figure 10B).”

Probably not a substantial claim: may not pass S4 (based).

Elevated Cr and Cu concentrations in CRD wood biochar necessitate careful application selection.

“Elevated Cr and Cu concentrations in CRD wood biochar necessitate careful application selection.”

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

The persistent thermocouple displacement in sealed retorts remains a fundamental instrumentation limitation requiring resolution before pilot-scale data can be benchmarked against laboratory studies.

“The persistent thermocouple displacement in sealed retorts remains a fundamental instrumentation limitation requiring resolution before pilot-scale data can be benchmarked against laboratory studies.”

Probably not a substantial claim: may not pass S3 (load-bearing).

The proximate analysis, stability indices, surface area, and yield loss of B800 after PHT at 600 °C for 30-90 min were obtained from two independent runs.

“Proximate analysis, stability indices, surface area, and yield loss of B800 after PHT at 600 • C for 30-90 min (two independent runs).”

May combine two claims. The quote only partly states this claim.

Beyond 75 min, pore coalescence and yield losses exceeding 20% defined the practical activation boundary.

“Beyond this, pore coalescence and yield losses exceeding 20% defined the practical activation boundary.”

May combine two claims.

The resulting larger interconnected pores reduce surface area but enhance mass transport, which supports water/nutrient retention potential.

“The resulting larger interconnected pores reduce surface area but enhance mass transport, supporting water/nutrient retention potential[126].”

• cites [126] An, 2022, Biochar application with reduced chemical fertilizers improves soil pore structure and rice productivity, Chemosphere sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S4 (based). May combine two claims.

Feedstock supply variability and energy return on energy invested remain critical uncertainties for scale up.

“Feedstock supply variability and energy return on energy invested also remain critical uncertainties”

Probably not a substantial claim: may not pass S4 (based).

Recycled pyrolysis gas directed to the combustion chamber to partially offset natural gas input constitutes the bioenergy co-product of this process.

“Recycled pyrolysis gas directed to the combustion chamber to partially offset natural gas input, constitutes the bioenergy co-product of this process.”

May combine two claims.

The observed biochar morphologies may indicate porosity generation from cracking of biochar carbon or tarry material, trapped gas evolution, removal of less stable inorganics, and/or bulk volatiles loss.

“Such morphologies may indicate porosity generation from cracking of biochar carbon or tarry material, trapped gas evolution, removal of less stable inorganics, and/or bulk volatiles loss[123].”

• cites [123] Mishra, 2024, A comprehensive review on activated carbon from pyrolysis of lignocellulosic biomass: An application for energy and the environment, Carbon Resour. Convers. sourceNot checked — no full text of the source

May combine two claims.

For B800, the key activation trade-off is preserving stable fixed carbon while eliminating volatiles, since treatment beyond 75 min gives no proportional gains in carbon maturity.

“The key activation trade-off is preserving stable FC while eliminating volatiles as treatment beyond 75 min reduces surface area and incurs yield losses exceeding 20%, without proportional gains in carbon maturity.”

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

The presence of Cl at 90 min PHT suggests AAEM existed in chloride salt forms, likely trapped within the biochar carbon structure before volatilizing as chlorinated hydrocarbons or organo-chloride compounds at high temperatures and residence times.

“The presence of Cl at 90 min PHT suggests AAEM existed in chloride salt forms, likely trapped within the biochar carbon structure before volatilizing as chlorinated hydrocarbons or organo-chloride compounds at high temperatures and residence times.”

May combine two claims.

The continuous extraction of pyrolysis gas under negative pressure may serve a dual role: supporting biochar quality by limiting tar redeposition and PAH formation, and reducing external fuel demand during active devolatilization.

“The continuous extraction of pyrolysis gas under negative pressure, therefore, may serve a dual role.It could support biochar quality by limiting tar redeposition and PAH formation, and it may also reduce external fuel demand during active devolatilization.”

Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

Moisture content, particle size, and volume/capacity of biochar are other dependent factors for self-heating.

“Moisture content, particle size, and volume/capacity of biochar are other dependent factors for self-heating.”