LI Xiaoya^1,2, ZHOU Tuo¹, NA Yongjie^1,2, ZHAO Liang^1,2, XIN Shengwei³

(1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; 2. School of Engineering Science,University of Chinese Academy of Sciences, Beijing 100049, China; 3. Shenhua Group Technology R&D Center,Xi’an 710065, China)

Abstract: Thermogravimetry-mass spectrometry with equivalent characteristic spectrum analysis (TG-MS&ECSA) was used to study the mechanism of oxidation reaction of CaS and solid-solid reaction between CaS and CaSO₄. The temperature ranges of the main reactions were clearly defined by comparing the relationship between the molar flows of the evolved gases during the process. The results show that the reaction of CaS with O₂ to form CaSO₄ begins at 617 ℃. The reaction between CaS and O₂ to form CaO and SO₂ begins at 997 ℃. And the reaction between CaS and CaSO₄ to form CaO and SO2 begins at 825 ℃.

Keywords: thermogravimetry-mass spectrometry with equivalent characteristic spectrum analysis; CaSO₄; CaS; SO₂

中图分类号：X773

文献标志码：A

收稿日期： 2018-10-20，修回日期：2018-12-12，在线出版时间：2019-01-08 11:31。

基金项目：国家重点研发计划课题项目，编号：2016YFB0600202。

第一作者简介：李晓亚(1993—)，男，硕士研究生，研究方向为循环流化床锅炉炉内氮氧化物的排放控制。E-mail：lixiaoya@iet.cn。

通信作者简介：周托(1979—)，男，博士，高级工程师，硕士生导师，研究方向为洁净煤燃烧技术。E-mail：zhoutuo@iet.cn。

文章编号：1008-5548(2019)02-0018-07

DOI:10.13732/j.issn.1008-5548.2019.02.004