Hydrochar production from defective coffee beans by hydrothermal carbonization
Open accessAbstract
This study aimed to produce and characterize hydrochars from defective coffee beans and its application as a solid fuel. Defective coffee beans were used as precursor residue for hydrochar synthesis. Reactions were run in a high-pressure reactor at temperatures of 150, 200 and 250 °C, under autogenesis pressure, for 40 min. Solid phase was recovered by filtration and characterized by CHNO-S analyzer, thermogravimetric analysis and differential scanning calorimetry. Hydrothermal carbonization temperature was key to change energy values and fuel properties. These results suggest hydrothermal carbonization is an effective and simple strategy for converting coffee waste into functional, high-quality, and energy-dense solid biofuels.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Hydrochars typically exhibit relatively low surface area and porosity, but chemically active functional groups such as ketone, carboxyl, and hydroxyl groups endow them with adequate adsorption capabilities.
“Although hydrochars typically exhibit relatively low surface area and porosity, the presence of chemically active functional groups-namely ketone, carboxyl (COOH), and hydroxyl groups-on their surfaces endows them with adequate adsorption capabilities [31].”
From Algal-Based Carbonaceous Materials for Environmental Remediation: Advances in Wastewater Treatment, Carbon Sequestration, and Biofuel Applications (2025) · cites this paper as [31]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Cites
Kinetic Parameters from Thermogravimetric Data
COATS, A. W., & REDFERN, J. P. (1964) · Nature · doi:10.1038/201068a0 · Cited by 6,930 · see citing works
The production of carbon materials by hydrothermal carbonization of cellulose
Sevilla, M., & Fuertes, A. B. (2009) · Carbon · doi:10.1016/j.carbon.2009.04.026 · Cited by 2,021 · see citing works
Funke, A., & Ziegler, F. (2010) · Biofuels Bioproducts and Biorefining · doi:10.1002/bbb.198 · Cited by 2,001 · see citing works
Weber, K., & Quicker, P. (2018) · Fuel · doi:10.1016/j.fuel.2017.12.054 · Cited by 1,522 · see citing works
A review on hydrothermal liquefaction of biomass
Gollakota, A. R. K., Kishore, N., & Gu, S. (2018) · Renewable and Sustainable Energy Reviews · doi:10.1016/j.rser.2017.05.178 · Cited by 1,306 · see citing works
A review of hydrothermal biomass processing
Tekin, K., Karagöz, S., & Bektaş, S. (2014) · Renewable and Sustainable Energy Reviews · doi:10.1016/j.rser.2014.07.216 · Cited by 730 · see citing works
Biochar stability assessment methods: A review
Leng, L., Huang, H., Li, H., Li, J., & Zhou, W. (2018) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2018.07.402 · Cited by 691 · see citing works
Sevilla, M., Maciá-Agulló, J. A., & Fuertes, A. B. (2011) · Biomass and Bioenergy · doi:10.1016/j.biombioe.2011.04.032 · Cited by 440 · see citing works
Upgrading biomass fuels via wet torrefaction: A review and comparison with dry torrefaction
Bach, Q.-V., & Skreiberg, Ø. (2016) · Renewable and Sustainable Energy Reviews · doi:10.1016/j.rser.2015.10.014 · Cited by 431 · see citing works
Application of nanoparticles in biofuels: An overview
Sekoai, P. T., Ouma, C. N. M., du Preez, S. P., Modisha, P. M., Engelbrecht, N., Bessarabov, D., & Ghimire, A. (2018) · Fuel · doi:10.1016/j.fuel.2018.10.030 · Cited by 390 · see citing works
Subcritical Water as Reaction Environment: Fundamentals of Hydrothermal Biomass Transformation
Möller, M., Nilges, P., Harnisch, F., & Schröder, U. (2011) · ChemSusChem · doi:10.1002/cssc.201000341 · Cited by 374 · see citing works
Thermokinetic and TG/DSC-FTIR study of pea waste biomass pyrolysis
Müsellim, E., Tahir, M. H., Ahmad, M. S., et al. (2018) · Applied Thermal Engineering · doi:10.1016/j.applthermaleng.2018.03.050 · Cited by 345 · see citing works
Lu, J.-J., & Chen, W.-H. (2015) · Applied Energy · doi:10.1016/j.apenergy.2015.09.026 · Cited by 319 · see citing works
Gao, P., Zhou, Y., Meng, F., Zhang, Y., Liu, Z., Zhang, W., & Xue, G. (2016) · Energy · doi:10.1016/j.energy.2015.12.123 · Cited by 315 · see citing works
Lucian, M., Volpe, M., Gao, L., Piro, G., Goldfarb, J. L., & Fiori, L. (2018) · Fuel · doi:10.1016/j.fuel.2018.06.060 · Cited by 300 · see citing works
Liu, Z., Quek, A., & Balasubramanian, R. (2013) · Applied Energy · doi:10.1016/j.apenergy.2013.08.087 · Cited by 287 · see citing works
Hydrothermal carbonization of tobacco stalk for fuel application
Cai, J., Li, B., Chaoying, C., Wang, J., Zhao, M., & Zhang, K. (2016) · Bioresource Technology · doi:10.1016/j.biortech.2016.08.098 · Cited by 253 · see citing works
Agro-industrial waste to solid biofuel through hydrothermal carbonization
Basso, D., Patuzzi, F., Castello, D., Baratieri, M., Rada, E. C., Weiss-Hortala, E., & Fiori, L. (2015) · Waste Management · doi:10.1016/j.wasman.2015.05.013 · Cited by 252 · see citing works
Fang, J., Gao, B., Chen, J., & Zimmerman, A. R. (2015) · Chemical Engineering Journal · doi:10.1016/j.cej.2015.01.026 · Cited by 249 · see citing works
Volpe, M., & Fiori, L. (2017) · Journal of Analytical and Applied Pyrolysis · doi:10.1016/j.jaap.2017.02.022 · Cited by 237 · see citing works
Ghanim, B., Pandey, D. S., Kwapiński, W., & Leahy, J. J. (2016) · Bioresource Technology · doi:10.1016/j.biortech.2016.05.087 · Cited by 188 · see citing works
Characteristics of co-hydrothermal carbonization on polyvinyl chloride wastes with bamboo
Yao, Z., & Ma, X. (2017) · Bioresource Technology · doi:10.1016/j.biortech.2017.09.098 · Cited by 154 · see citing works
Parshetti, G. K., Quek, A., Betha, R., & Balasubramanian, R. (2013) · Fuel Processing Technology · doi:10.1016/j.fuproc.2013.09.010 · Cited by 143 · see citing works
Hydrothermal Carbonization of Biomass: Major Organic Components of the Aqueous Phase
Becker, R., Dorgerloh, U., Paulke, E., Mumme, J., & Irene Nehls, A. (2014) · Chemical Engineering & Technology · doi:10.1002/ceat.201300401 · Cited by 140 · see citing works
Zhuang, X., Zhan, H., Huang, Y., Song, Y., Yin, X., & Wu, C. (2018) · Bioresource Technology · doi:10.1016/j.biortech.2018.07.002 · Cited by 123 · see citing works
Characteristics of hydrochar and liquid fraction from hydrothermal carbonization of cassava rhizome
Nakason, K., Panyapinyopol, B., Kanokkantapong, V., Viriya‐empikul, N., Kraithong, W., & Pavasant, P. (2017) · Journal of the Energy Institute · doi:10.1016/j.joei.2017.01.002 · Cited by 110 · see citing works
Influences of feedstock type and process variables on hydrochar properties
Toptas Tag, A., Duman, G., & Yanik, J. (2018) · Bioresource Technology · doi:10.1016/j.biortech.2017.11.058 · Cited by 97 · see citing works
Fiori, L., Basso, D., Castello, D., & Baratieri, M. (2014) · Chemical engineering transactions · doi:10.3303/cet1437010 · Cited by 81 · see citing works
Characterization of grape pomace and pyrenean oak pellets
García-Cuevas, M. T. M., Arranz, J. I., Román, S., Rojas, S., Puertas, I. M., López, M., & Cruz, J. (2010) · Fuel Processing Technology · doi:10.1016/j.fuproc.2010.05.035 · Cited by 79 · see citing works
Ulbrich, M., Preßl, D., Fendt, S., Gaderer, M., & Spliethoff, H. (2017) · Fuel Processing Technology · doi:10.1016/j.fuproc.2017.08.010 · Cited by 68 · see citing works
Collazo, J., Pazó, J. A., Granada, E., Saavedra, Á., & Eguía, P. (2012) · Energy · doi:10.1016/j.energy.2012.07.018 · Cited by 33 · see citing works
Thermal destruction of organic waste hydrophobicity for agricultural soils application
Comino, F., Aranda, V., Domínguez‐Vidal, A., & Ayora‐Cañada, M. J. (2017) · Journal of Environmental Management · doi:10.1016/j.jenvman.2017.07.024 · Cited by 22 · see citing works
Zheng, Q., Morimoto, M., & Takanohashi, T. (2017) · RSC Advances · doi:10.1039/c7ra07847a · Cited by 13 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Angulo-Mosquera, L. S., Alvarado-Alvarado, A. A., Rivas-Arrieta, M. J., Cattaneo, C. R., Rene, E. R., & García-Depraect, O. (2021) · Science of The Total Environment · doi:10.1016/j.scitotenv.2021.148816 · Cited by 103 · see citing works
González Fernández, L. A., Medellín Castillo, N. A., Sánchez Polo, M., Navarro Frómeta, A. E., & Vilasó Cadre, J. E. (2025) · Processes · doi:10.3390/pr13020556 · Cited by 37 · see citing works
- Authors
- Santos Santana, M., Pereira Alves, R., da Silva Borges, W. M., Francisquini, E., & Guerreiro, M. C.
- Affiliations
- Universidade Federal de Lavras (BR)
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2020-03
- Volume
- 300
- Pages
- 122653
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2994941188
- Cited by
- 61
- References
- 33
- Citations by year
- 2026: 6 · 2025: 9 · 2024: 11 · 2023: 8 · 2022: 11 · 2021: 12 · 2020: 4
- FWCI
- 2.38
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Fundação de Amparo à Pesquisa do Estado de Minas Gerais
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Engineering › Mechanical Engineering › Coal Combustion and Slurry Processing
- Physical Sciences › Engineering › Ocean Engineering › Coal Properties and Utilization
- Keywords
- hydrochar, hydrothermal carbonization, coffee waste, solid biofuels, biomass conversion, carbonization temperature, energy density, fuel properties
- MeSH terms
- Carbon, Coffee, Food, Temperature, Biofuels
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
