Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas
The current work systematically studied the technical feasibility of potassium-looping activation of biochar using K2CO3 for the coproduction of highly microporous carbon and syngas. Compared with the solid mixing method, the impregnation method showed a higher biochar activation efficiency and prod...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/175622 |
| _version_ | 1826112395837177856 |
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| author | Shen, Yafei Loong, Cyrus Foo Jit Chen, Wen Qian Ge, Liya Chan, Wei Ping Veksha, Andrei Lisak, Grzegorz |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Shen, Yafei Loong, Cyrus Foo Jit Chen, Wen Qian Ge, Liya Chan, Wei Ping Veksha, Andrei Lisak, Grzegorz |
| author_sort | Shen, Yafei |
| collection | NTU |
| description | The current work systematically studied the technical feasibility of potassium-looping activation of biochar using K2CO3 for the coproduction of highly microporous carbon and syngas. Compared with the solid mixing method, the impregnation method showed a higher biochar activation efficiency and produced a higher quality of activated carbon. By the impregnation method, a high yield of activated carbon (60 wt %, per biochar mass) was achieved under the optimal conditions, such as an activation temperature of 800 °C, a mass ratio of biochar to K2CO3 (1:1), and a retention time of 3 h. The activated carbon with a high specific surface area (1091 m2/g) and a high microporosity (98%) was obtained. Besides, during the biochar activation process, syngas (CO/H2 molar ratio of 1.0-1.5 and yield of ∼23 wt %) was generated. The yield and surface area of activated carbon were not obviously reduced after water leaching within three cycles. The potassium-looping system was evaluated to recover and reuse biochar activation agent within subsequent cycles. |
| first_indexed | 2024-10-01T03:06:14Z |
| format | Journal Article |
| id | ntu-10356/175622 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:06:14Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1756222024-05-01T15:36:58Z Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas Shen, Yafei Loong, Cyrus Foo Jit Chen, Wen Qian Ge, Liya Chan, Wei Ping Veksha, Andrei Lisak, Grzegorz School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering Chemical activation Impregnation The current work systematically studied the technical feasibility of potassium-looping activation of biochar using K2CO3 for the coproduction of highly microporous carbon and syngas. Compared with the solid mixing method, the impregnation method showed a higher biochar activation efficiency and produced a higher quality of activated carbon. By the impregnation method, a high yield of activated carbon (60 wt %, per biochar mass) was achieved under the optimal conditions, such as an activation temperature of 800 °C, a mass ratio of biochar to K2CO3 (1:1), and a retention time of 3 h. The activated carbon with a high specific surface area (1091 m2/g) and a high microporosity (98%) was obtained. Besides, during the biochar activation process, syngas (CO/H2 molar ratio of 1.0-1.5 and yield of ∼23 wt %) was generated. The yield and surface area of activated carbon were not obviously reduced after water leaching within three cycles. The potassium-looping system was evaluated to recover and reuse biochar activation agent within subsequent cycles. Submitted/Accepted version 2024-04-30T08:15:52Z 2024-04-30T08:15:52Z 2024 Journal Article Shen, Y., Loong, C. F. J., Chen, W. Q., Ge, L., Chan, W. P., Veksha, A. & Lisak, G. (2024). Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas. Energy & Fuels, 38(4), 3186-3197. https://dx.doi.org/10.1021/acs.energyfuels.3c05170 0887-0624 https://hdl.handle.net/10356/175622 10.1021/acs.energyfuels.3c05170 2-s2.0-85184811949 4 38 3186 3197 en Energy & Fuels © 2024 American Chemical Society. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1021/acs.energyfuels.3c05170. application/pdf |
| spellingShingle | Engineering Chemical activation Impregnation Shen, Yafei Loong, Cyrus Foo Jit Chen, Wen Qian Ge, Liya Chan, Wei Ping Veksha, Andrei Lisak, Grzegorz Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas |
| title | Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas |
| title_full | Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas |
| title_fullStr | Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas |
| title_full_unstemmed | Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas |
| title_short | Closed-loop K2CO3 activation of biochar for coproduction of microporous carbon and syngas |
| title_sort | closed loop k2co3 activation of biochar for coproduction of microporous carbon and syngas |
| topic | Engineering Chemical activation Impregnation |
| url | https://hdl.handle.net/10356/175622 |
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