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Recent advances in organic waste pyrolysis and gasification in a CO 2 environment to value-added products.
- Source :
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Journal of environmental management [J Environ Manage] 2024 Apr; Vol. 356, pp. 120666. Date of Electronic Publication: 2024 Mar 14. - Publication Year :
- 2024
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Abstract
- The persistent combustion of fossil fuels has resulted in a widespread greenhouse effect attributable to the continual elevation of carbon dioxide (CO <subscript>2</subscript> ) levels in the atmosphere. Recent research indicates that utilizing CO <subscript>2</subscript> as a pyrolysis gasification medium diminishes CO <subscript>2</subscript> emissions and concurrently augments the value of the resultant pyrolysis gasification products. This paper reviews recent advancements in the pyrolysis gasification of organic solid wastes under a CO <subscript>2</subscript> atmosphere. Meanwhile, the mechanisms of CO <subscript>2</subscript> influence in the pyrolysis and gasification processes were also discussed. In comparison to noble gases, CO <subscript>2</subscript> exhibits reactivity with char at≥710 °C, resulting in additional mass loss of the sample. In addition, CO <subscript>2</subscript> was able to increase the specific surface area and stability of biochar and reduce biooil toxicity by lowering the content of cyclic compounds in the biooil, while CO <subscript>2</subscript> was able to react with GPRs with some volatile products (e.g., light hydrocarbons) to increase biogas yield. Finally, CO <subscript>2</subscript> also prevents catalyst deactivation by reducing secondary coke formation. We also recommend directing future attention toward utilizing unpurified CO <subscript>2</subscript> in pyrolysis and gasification. This review aims to expand the utilization of CO <subscript>2</subscript> and advocate for applying pyrolysis gasification products.<br />Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2024 Elsevier Ltd. All rights reserved.)
- Subjects :
- Chemical Phenomena
Catalysis
Solid Waste
Carbon Dioxide
Pyrolysis
Subjects
Details
- Language :
- English
- ISSN :
- 1095-8630
- Volume :
- 356
- Database :
- MEDLINE
- Journal :
- Journal of environmental management
- Publication Type :
- Academic Journal
- Accession number :
- 38490005
- Full Text :
- https://doi.org/10.1016/j.jenvman.2024.120666