生物炭
合成气
微型多孔材料
活性炭
化学工程
碳纤维
化学
浸出(土壤学)
产量(工程)
材料科学
催化作用
吸附
热解
有机化学
复合材料
复合数
工程类
环境科学
土壤科学
土壤水分
作者
Yafei Shen,C.‐K. Loong,Wenqian Chen,Liya Ge,Wei Ping Chan,Andrei Veksha,Grzegorz Lisak
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2024-01-30
卷期号:38 (4): 3186-3197
标识
DOI:10.1021/acs.energyfuels.3c05170
摘要
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.
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