文献类型：期刊文献

英文题名：An integrated method for preparing low quinoline insoluble modified pitch

作者：Liu, Peng[1];Zhang, Dexiang[1];Yang, Xu[2];Cheng, Bowu[3]

机构：[1]E China Univ Sci & Technol, Minist Educ, Dept Chem Engn Energy Resources, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China;[2]Res Inst China PingMei ShenMa Grp, Pingdingshan 467000, Henan Province, Peoples R China;[3]Zhaoqing Shunxin Coal Chem Technol Co Ltd, Zhaoqing 526238, Guangdong, Peoples R China

年份：2015

卷号：93

期号：8

起止页码：1448

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20152400935794);WOS:【SCI-EXPANDED(收录号:WOS:000357821400014)】；

基金：We are grateful to the National Key Basic Research Development Program (2011CB201304) and Guangdong Province Hi-tech and New Zone development guidance program (2011B010700058) for financial support.

语种：英文

外文关键词：coal tar; thermal polymerization; modified pitch; low QI

摘要：Pitches with three different softening points (SPs) were obtained from the same original coal tar purified in the laboratory by centrifuge, hot filtration, and distillation. The effect of temperature and residence time on thermal polymerization of the three types of pitch was investigated using a laboratory autoclave. The differences in the composition of the three types of pitch was established by elemental and thermogravimetric analyses. The results show that the purified coal tar with low quinoline insolubles (QI) of 1.8g/kg (0.18wt%) was obtained by centrifuge and hot filtration treatment at 348K, with a 1000-mesh filter. The coal tar recovery is approximately 800g/kg (80wt%). The rate of thermal polymerization is influenced by the SP of the original pitch controlled by the distillation conditions. The QI of the modified pitch decreases (from 3.5 to 1.8g/kg, 0.35 to 0.18 wt%) in the initial reaction stages at low temperatures (below 683K) and increases at higher temperatures during the thermal treatment. The SP, coking value (CV), and toluene insolubles (TI) of modified pitches increase monotonically with temperature. A modified pitch with a low QI of 1.8g/kg (0.18wt%), a SP of 366K, a TI of 234.2g/kg (23.42wt%), and a CV of 485g/kg (48.50wt%) was prepared from the original pitch with an SP of 319K by thermal polymerization at 683K for 1h.