文献类型：期刊文献

英文题名：Effect of CO2 on the characteristics of soot derived from coal rapid pyrolysis

作者：Chang, Qinghua[1];Gao, Rui[1];Li, Hongjun[1];Yu, Guangsuo[1];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai Engn Res Ctr Coal Gasificat, Minist Educ, Shanghai 200237, Peoples R China

年份：2018

卷号：197

起止页码：328

外文期刊名：COMBUSTION AND FLAME

收录：;EI(收录号：20183705799712);WOS:【SCI-EXPANDED(收录号:WOS:000447815800029)】；

基金：This work was supported by the National Natural Science Foundation of China (21776086 and 21376081).

语种：英文

外文关键词：Coal-derived soot; CO2; Rapid pyrolysis; Soot microstructure; Soot reactivity

摘要：The present work aims to investigate the effects of a CO2-rich atmosphere on the characteristics of coal-derived soot. The rapid pyrolysis of Shenfu bituminous coal was conducted in a Drop tube furnace (DTF) in N-2 and CO2 atmospheres with a wall temperature of 1073-1473 K and residence time below 700 ms. The yields and microstructure characteristics of N-2-soot and CO2-soot were analysed by using a series of techniques (elemental analysis, HRTEM, Raman, XRD, FT-IR and thermogravimetry techniques). CO2 enhanced the soot formation and proceeded the dehydrogenation. CO2 improved the order of internal carbon lattices, enhanced the lateral extension of carbon nanostructures, decreased the interplanar spacing of the graphene layers and also promoted the stack of polyaromatic layers. The variations of the SOLO, DUO, TRIO and QUARTO structures were also analysed, and the contribution of CO2 was found to reduce the defects of the basic structure units (BSU). The defects of soot were an important indication of the initial gasification reactivity. Overall, CO2-soot was more mature and low active than N-2-soot. (C) 2018 Published by Elsevier Inc. on behalf of The Combustion Institute.