文献类型：期刊文献

英文题名：The roles of the low molecular weight compounds in the low-temperature pyrolysis of low-rank coal

作者：Li, Yanling[1];Huang, Sheng[1,2];Wu, Youqing[1,2];Wu, Shiyong[1,2];Gao, Jinsheng[1,2]

机构：[1]East China Univ Sci & Technol, Dept Chem Engn Energy Resources, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：92

期号：2

起止页码：203

外文期刊名：JOURNAL OF THE ENERGY INSTITUTE

收录：;EI(收录号：20181004850666);WOS:【SCI-EXPANDED(收录号:WOS:000460717800001)】；

基金：This work was subsidized by the National Natural Science Foundation of China (Grant No. 21506060).

语种：英文

外文关键词：Low-rank coal; Thermal dissolution; Pyrolysis; Low molecular weight compounds

摘要：To investigate the roles of the low molecular weight compounds (LMWCs) in the low-temperature pyrolysis of low-rank coal, Hongliulin coal (HL) was firstly thermal dissolved in n-hexane (HEX) at 260 -340 degrees C, and the pyrolysis characteristics and product distributions of HL and its residues of thermal dissolution (RTDs) were compared. Results show that the LMWCs have a significant effect on the low-temperature pyrolysis characteristics of HL. The pyrolysis liquid (PL260-340) and gaseous product yields of RTDs, which decrease with rising TD temperature (TDT), are dramatically lower than those of HL The total amounts of HEX soluble portion (SP) and PL at the TDT of 260 and 280 degrees C are essentially equal to PLHL, implying that almost all LMWCs, which with relatively low boiling point, can be directly evaporated and transferred into tar during the pyrolysis of HL The GC/MS analysis indicates that the LMWCs contain some hydrogen-donor components (such as tetralin and indane) which can act as hydrogen donor for the stabilization of radical fragments during HI. pyrolysis process. (C) 2018 Energy Institute. Published by Elsevier Ltd. All rights reserved.