The effects of coal ash on sulfur transformation during secondary reactions of coal pyrolysis

被引：0

作者：

Jia X. ^{[1
]}

Wang Q.-H. ^{[2
]}

Zhang Y.-H. ^{[1
]}

Han Z.-N. ^{[1
]}

Song X.-F. ^{[1
]}

Wang C. ^{[1
]}

Fu L.-L. ^{[1
]}

Xu G.-W. ^{[1
]}

机构：

[1] Key Laboratory on Resources of Chemicals and Materials of Ministry of Education, Shenyang University of Chemical Technology, Shenyang

[2] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2021年 / 49卷 / 11期

关键词：

CaSO[!sub]4[!/sub; Coal ash; Coal pyrolysis; H[!sub]2[!/sub]S; Sulfur;

D O I：

10.19906/j.cnki.JFCT.2021081

中图分类号：

学科分类号：

摘要：

During the coal pyrolysis with the coal ash as heat carrier, the interactions of coal ash and volatile matters could occur in the secondary reactions, which would affect the final sulfur-containing product yields of volatile matter. The objective of this paper was to reveal the effects of coal ash on the sulfur transformation during the secondary reactions. The results showed that the presence of XLT ash during secondary reactions inhibited H2S and COS release at low temperatures due to the sulfur fixation of Fe2O3 existed in the ash. However, it enhanced H2S and COS release at high temperatures, which was mainly caused by the formation of sulfur-containing gases through the reactions between CaSO4 and reducing gas (i.e. H2, CO, and CH4). The influences of Fe2O3 and CaSO4 were also investigated to reveal the mechanism of the influence of coal ash, and it was found that H2S and COS yields were reduced with the addition of Fe2O3, but those two gases were slightly increased by the presence of CaSO4 at 800 ℃, indicating that Fe2O3 and CaSO4 played important roles in the interactions between the coal ash and sulfur-containing gases. © 2021, Science Press. All right reserved.

引用

页码：1577 / 1583

页数：6

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