生物炭
热解
木炭
碳化
废物管理
多孔性
固碳
制浆造纸工业
活性炭
化学
材料科学
化学工程
吸附
有机化学
二氧化碳
工程类
作者
Mingjing He,Zibo Xu,Yuqing Sun,P.S. Chan,Iris Lui,Daniel C.W. Tsang
标识
DOI:10.1016/j.biortech.2021.125811
摘要
Wood waste-derived biochar with tunable carbon structure and surface functionality has a great potential for various environmental applications and circular economy; however, a holistic understanding on the application-oriented production of high-efficacy biochar is lacking. Thus, the co-impacts of different pyrolysis conditions (temperature and duration) and activation methods (steam, CO2, and acid pretreatment) on the biochar properties were first investigated. A temperature of 650 ℃ was effective in forming carbonized structure in biochar, while 750 ℃ was critical for the porous structure development. A longer pyrolysis duration (>60 min) enhanced the pore volume without compromising the yield. The activated biochar exhibited a larger pore volume (2.1- to 2.9-fold of pristine biochar) for potential high-end emerging applications. The acid pretreatment effectively removed dissolved organic carbon and most metals from the biochar. This study provides an essential guidance on the fit-for-purpose designs of biochar production conditions for sustainable wood waste management.
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