The roles of the low molecular weight compounds in the low-temperature pyrolysis of low-rank coal
The roles of the low molecular weight compounds in the low-temperature pyrolysis of low-rank coal
复制标题
低分子化合物在低阶煤低温热解中的作用
DOI：
10.1016/j.joei.2018.02.001
复制
发表时间：
2019-04-01
影响因子：
5.7
通讯作者：
Gao, Jinsheng
中科院分区：
文献类型：
--
作者：
Li, Yanling;Huang, Sheng;Gao, Jinsheng
为研究低分子量化合物（LMWCs）在低阶煤低温热解过程中的作用，首次将红柳林煤（HL）在260 ~ 340 ℃的正己烷（HEX）中进行热溶，比较了HL及其热溶残渣（RTD）的热解特性和产物分布。结果表明，低分子量碳对HL的低温热解特性有显著影响。热解液（PL 260 -340）和气态产物产率随TD温度（TDT）升高而降低，远低于HL。TDT为260和280 ° C时HEX可溶部分（SP）和PL的总量基本上等于PLHL，这意味着几乎所有沸点相对较低的LMWC，GC/MS分析表明，低分子量碳中含有供氢组分（如四氢萘和茚满），这些供氢组分可作为氢供体，在HI过程中起到稳定自由基碎片的作用。热解过程(C)2018能源研究所由爱思唯尔有限公司出版。保留所有权利。
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.