Non-Energy Valorization of Residual Biomasses via HTC: CO2 Capture onto Activated Hydrochars
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This study aims to investigate the CO2 sorption capacity of hydrochar, obtained via hydrothermal carbonization (HTC). Silver fir sawdust was used as a model material. The batch runs went at 200 °C and up to 120 min. The hydrochar was activated with potassium hydroxide impregnation and subsequent thermal treatment (600 °C, 1 h). CO2 capture was assayed using a pressure swing adsorption (PSA) process. The morphology and porosity of hydrochar, characterized through Brunauer-Emmett-Teller, Barrett-Joyner-Halenda (BET-BJH) and scanning electron microscopy (SEM) analyses, were reported and the sorbent capacity was compared with traditional sorbents. The hydrochar recovered immediately after the warm-up of the HTC reactor had better performances. The Langmuir equilibrium isotherm fits the experimental data satisfactorily. Selectivity tests performed with a model biogas mixture indicated a possible use of hydrochar for sustainable upgrading of biogas to bio-methane. It is conceivably a new, feasible, and promising option for CO2 capture with low cost, environmentally friendly materials.
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Gallucci et al. (2020) prepared silver fir sawdust-derived hydrochar and activated hydrochar via HTC; CO2 capture via pressure swing adsorption adsorbed 6.57 mmol/g CO2 at 5 bar with hydrochar; hydrochar showed higher adsorption compared to activated hydrochar and other traditional sorbents.
“Silver fir sawdust-derived hydrochar and activated hydrochar were prepared via the HTC technique by Gallucci et al. (2020) [96].CO 2 capture studies were assayed via pressure swing adsorption and 6.57 mmol/g of CO 2 was adsorbed at 5 bar with hydrochar.This study concluded that hydrochar showed higher adsorption compared to the activated hydrochar and other traditional sorbents.”
From Hydrochar: A Review on Its Production Technologies and Applications (2021) · cites this paper as [96]
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References 44 · Cited by 24
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- IPCC. Annex II: Glossary. In Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change; Core Writing Team, Pachauri, R.K., Meyer, L.A., Eds.; IPCC: Geneva, Switzerland, 2014; pp. 117-130.
- Haefeli, S.; Bosi, M.; Philibert, C. Carbon Dioxide Capture and Storage Issues. Accounting and Baselines under the United Nations Framework Convention on Climate Change (UNFCCC). IEA Information Paper. Available online: https://www.osti.gov/etdeweb/biblio/20543208 (accessed on 8 March 2020).
- Chakravarti, S.; Gupta, A.; Hunek, B. Advanced Technology for the Capture of Carbon Dioxide from Flue Gases. In Proceedings of the First National Conference on Carbon Sequestration, Washington, DC, USA, 14-17 May 2001;
- IPCC. Carbon Dioxide Capture and Storage; Metz, B., Davidson, O., de Coninck, H., Loos, M., Meyer, L., Eds.; Cambridge University Press: New York, NY, USA, 2005; 431p, Available online: https://archive.ipcc.ch/pdf/ special-reports/srccs/srccs_wholereport.pdf (accessed on 8 March 2020).
- Authors
- Gallucci, K., Taglieri, L., Papa, A. A., Di Lauro, F., Ahmad, Z., & Gallifuoco, A.
- Affiliations
- University of L'Aquila (IT)
- Industrial Engineering Department, University of L’Aquila, Monteluco di Roio—67100 L’Aquila, Italy
- Corresponding author
- Gallucci, Katia
- Venue
- Applied Sciences
- Publisher
- MDPI AG
- Published
- 2020-03-10
- Volume
- 10
- Issue
- 5
- Pages
- 1879
- ISSN
- 2076-3417 (ISSN-L)
- OpenAlex
- W3012441305
- Cited by
- 24
- References
- 44
- Citations by year
- 2026: 1 · 2025: 5 · 2024: 3 · 2023: 8 · 2022: 3 · 2021: 4
- FWCI
- 1.84
- Type
- journal article
- Language
- en
- Open access
- gold
- dx.doi.org
- Licence
- Locations
- Applied Sciences (publishedVersion, cc-by)
- Archivio Istituzionale della Ricerca - Università degli Studi dell Aquila (submittedVersion, cc-by-nc-nd)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- INFM-OAR (INFN Catania) (submittedVersion, cc-by)
- Zenodo (CERN European Organization for Nuclear Research) (other-oa)
- Funders
- European Regional Development Fund (E12H18000230001)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Keywords
- hydrochar, hydrothermal carbonization, CO2 capture, CO2 sorption, KOH activation, pressure swing adsorption, biogas upgrading, biomethane, Langmuir isotherm, sorbent capacity, biomass waste valorization
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