文献类型：期刊文献

英文题名：Study on rapid pyrolysis and in-situ char gasification characteristics of coal and petroleum coke

作者：Ding, Lu[1];Wei, Juntao[1];Dai, Zhenghua[1];Guo, Qinghua[1];Yu, Guangsuo[1]

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

年份：2016

卷号：41

期号：38

起止页码：16823

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20164803072774);WOS:【SCI-EXPANDED(收录号:WOS:000383930700024)】；

基金：The research was supported by National Natural Science Foundation of China (21376081) and National High Technology Research and Development Program of China (863 Program, 2012AA053101)

语种：英文

外文关键词：Rapid pyrolysis; Gas release; Structure evolution; In-situ heating stage; Shrinking particle mode; Shrinking core mode

摘要：Rapid pyrolysis characteristics of three different rank coals and two petroleum cokes were investigated using a drop tube furnace. Moreover, gasification characteristics of char samples were studied in an in-situ heating stage. The results showed that H-2 and CO were the main gaseous pyrolysis products of coal samples. The relative content of H-2 and CO increased with increasing pyrolysis temperature. The volume fraction of H-2 in syngas increased with increasing coal rank, whereas that of CO showed the contrary trend. Anthracite and petroleum cokes (Petcoke 1 and Petcoke 2) exhibited a great similarity in gas release characteristics. There was a maximum value for the specific surface area and graphitization degree of char samples with increasing pyrolysis temperature. The results of in-situ heating stage experiments indicated that the most of char particles reacted with CO2 in the shrinking particle mode at the initial stage. Char samples of petcokes and anthracite were similar in slow consumption of particle skeleton during gasification. Interestingly, petcokes demonstrated particle migration, residual agglomeration, and rapid consumption at the later reaction stage. The variation trend of the area shrinkage ratio of char samples was well verified by the TGA results. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.