煤炭工程 ›› 2018, Vol. 50 ›› Issue (7): 133-136.doi: 10.11799/ce201807033

• 研究探讨 • 上一篇    下一篇

马莲台煤热解过程中硫元素的迁移分析

冯盛丹,樊建江,李平,等   

  1. 宁夏大学化学化工学院
  • 收稿日期:2017-07-11 修回日期:2017-09-19 出版日期:2018-07-20 发布日期:2018-08-28
  • 通讯作者: 李平 E-mail:liping@nxu.edu.cn

Investigation of Sulfur Transformation during Pyrolysis of Maliantai Coal

  • Received:2017-07-11 Revised:2017-09-19 Online:2018-07-20 Published:2018-08-28

摘要: 针对马莲台煤热解过程中硫元素的迁移规律进行研究,利用中低温热解试验获得了不同热解终温时原煤中硫元素的迁移去向和迁移比例,并研究了热解终温对硫元素迁移比例的影响和不同形态硫在产物中的转化。结果表明:热解终温在400~800℃,原煤中53%~63%的硫被固定在固态煤焦中|随着热解终温的升高,煤中硫元素向气、液相热解产物中的迁移比例有所升高,650℃时迁移比例达到约46%|经分析表征,煤焦中的硫元素主要以有机硫的形式存在,其中噻吩含量最高。

关键词: 煤热解, 迁移, 形态硫, XPS

Abstract: In order to obtain quantitative information on the sulfur transformation during pyrolysis, the pyrolysis experiments of Maliantai coal from Ningxia were conducted in a lab-scale tubular reactor. The results show that 50 % to 70% sulfur of the total sulfur is fixed in the char. The desulfurization increases with the temperature and then retains about 46% when the temperature was higher than 600℃, in which the decomposition of sulfur form is dominated by the pyrite. Content of organic sulfur is higher than other sulfur forms, especially for the thiophene and sulfone. Mutual transformation of sulfur forms occurs during pyrolysis. And the desulfurization is the highest at temperature of 600℃.

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