Gasification reactivity of Hami coal liquefaction residue char

被引：0

作者：

Huang Y. ^{[1
,2
]}

Gong Y. ^{[1
,2
]}

Zhang Z. ^{[1
,2
]}

Wei J. ^{[1
,2
]}

Guo Q. ^{[1
,2
]}

Yu G. ^{[1
,2
,3
]}

机构：

[1] School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai

[2] Shanghai Engineering Research Center of Coal Gasification, Shanghai

[3] State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, Ningxia University, Yinchuan

来源：

Meitan Xuebao/Journal of the China Coal Society | 2020年 / 45卷 / 05期

关键词：

Coal char; Gasification reactivity; Liquefaction residue; Physicochemical structure;

D O I：

10.13225/j.cnki.jccs.2019.0083

中图分类号：

学科分类号：

摘要：

Liquefaction residue is an important by-product of the coal liquefaction process and its application as gasification feedstock would help to improve the comprehensive utilization efficiency of coal resource.In this study, the rapid pyrolysis chars of Hami Naomaohu long flame coal and its liquefaction residue were prepared at different pyrolysis temperatures (1 000℃ and 1 300℃) using a high-frequence furnace.The gasification reactivity of chars was investigated using a Thermogravimetric Analyzer (TGA) at different gasification temperatures (1 000℃, 1 100℃, 1 200℃ and 1 300℃).In addition, Scanning Electron Microscopy, Physisorption Analyzer and Laser Raman Spectrometer were used to systematically characterize the physicochemical properties (pore and carbon structure) of samples so as to correlate the char gasification reactivity.The results show that the gasification reactivity of coal char and the liquefaction residue char was affected by gasification temperature, pore structure and carbon structure.The gasification reactivity of coal char was higher than that of liquefaction residue char at the same pyrolysis and gasification temperature, which was mainly due to the difference in physicochemical properties between coal char and liquefaction residue char.The former showed the more developed pore structure, the higher order degree of carbon structure and the greater amount of amorphous carbon structure than the later.The reactivity index of coal char and liquefaction residue char increased from 0.43 and 0.38 to 0.81 and 0.79, respectively, and the reactivity index ratio increased from 0.88 to 0.98 as the gasification temperature increased from 1 000℃ to 1 300℃, indicating that the increase of the gasification temperature can promote the gasification reaction, but the influences of pore structure and carbon structure on the char gasification reactivity was weakened.Specifically for the gasification temperature of 1 300℃, the temperature becomes the main factor affecting the gasification reactivity and the gasification reactivity of the liquefaction residue char was closed to that of coal char, demonstrating that the liquefaction residue could be utilized as a raw material in entrained-flow gasification based on the viewpoint of gasification reactivity. © 2020, Editorial Office of Journal of China Coal Society. All right reserved.

引用

页码：1874 / 1880

页数：6

共 29 条

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