文献类型：期刊文献

英文题名：Combining wet torrefaction and pyrolysis for woody biochar upgradation and structural modification

作者：He, Qing[1];Raheem, Abdul[1];Ding, Lu[1];Xu, Jianliang[1];Cheng, Chen[1];Yu, Guangsuo[1,2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China

年份：2021

卷号：243

外文期刊名：ENERGY CONVERSION AND MANAGEMENT

收录：;EI(收录号：20212410500440);WOS:【SCI-EXPANDED(收录号:WOS:000679387600004)】；

基金：This work was supported by National Key R&D Program of China (2018YFB0605000), National Natural Science Foundation of China (21878093), Fundamental Research Funds for Central Universities of China (JKB012011013), and Key Program for Outstanding PhD Candidate of East China University of Science and Technology.

语种：英文

外文关键词：Gasification; Wet torrefaction; Kinetics; Biochar; Structure

摘要：This study investigated the effect of wet torrefaction (WT) on biochar property derived from softwood (PIW) and hardwood (POW) pyrolysis. The biochar gasification was performed in a thermogravimetric analyzer, followed by kinetic modelling. The biochar structure was analyzed, including inherent metals, pore structure and carbon structure. The results showed that WT affected reactivity and structure of PIW-derived biochar more than that of POW-derived biochar. The critical WT temperature determined the reactivity changes together with kinetic parameters. The WT affected the inorganic and organic component in biochar simultaneously. As results of WT, more than 70 and 50% ion-exchanged AAEMs in PIW-derived biochar and POW-derived biochar were removed. Nevertheless, the organic structure had essential effect on the gasification reactivity. More pronounced structure evolution of PIW-derived biochar was observed, including lower mesopore surface area, more graphite structure and small rings. This research provides new insights into the structure-reactivity correlation for biochar utilization.