化工进展2019，Vol.38Issue(3)：1346-1352,7.DOI:10.16085/j.issn.1000-6613.2018-0348
停留时间对低阶煤快速热解产物分布、组成及结构的影响
Effect of residence time on distribution, composition and structure of products derived from fast coal pyrolysis
张俊杰 1徐绍平 1王光永 2杨怀天1
作者信息
- 1. 大连理工大学化工学院, 精细化工国家重点实验室, 辽宁 大连 116024
- 2. 西南化工研究设计院有限公司, 国家碳一化学工程技术研究中心, 工业排放气综合利用国家重点实验室, 四川 成都 610225
- 折叠
摘要
Abstract
The fast pyrolysis of Shenmu bituminous coal (SM) and Inner Mongolia lignite (NM) at different residence time in a free fall reactor is investigated. The secondary pyrolysis of the nascent char from the fast pyrolysis is also studied under a controlled temperature. The results show that with the increase of the residence time, the devolatilizations of both coals are enhanced. The tar yield from SM pyrolysis increases while that of NM pyrolysis increases firstly and then decreases. In addition, the residence time has significant influence on tar quality. With the increase of residence time, the benzenes and phenols in the light tars from both coals increase at first and then decrease, and longer residence time leads to obvious generation of polycondensed aromatics. The secondary pyrolysis of char produces more gaseous product, while the tar yield and its composition change little. Nevertheless, the micropores of char are developed. These results indicate that the fast pyrolysis of coal with suitable residence time of coal at moderate temperatures is advisable for producing high quality tar.关键词
煤/快速热解/停留时间/半焦/焦油Key words
coal/fast pyrolysis/residence time/char/tar分类
化学化工引用本文复制引用
张俊杰,徐绍平,王光永,杨怀天..停留时间对低阶煤快速热解产物分布、组成及结构的影响[J].化工进展,2019,38(3):1346-1352,7.
