Reaction mechanism study of new scheme using elemental sulfur for conversion of barite to barium sulfide

被引：11

作者：

Zhang, Wei ^{[1
]}

Zhang, Fengzhen ^{[2
]}

Ma, Liping ^{[1
]}

Yang, Jie ^{[1
]}

Yang, Jing ^{[1
]}

Xiang, Huaping ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650093, Yunnan, Peoples R China

[2] Sichuan Univ Sci & Engn, Coll Chem Engn, Zigong 643000, Sichuan, Peoples R China

来源：

POWDER TECHNOLOGY | 2020年 / 360卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Barium sulfate; Barium sulfide; Sulfur; Non-isothermal kinetic; Thermodynamic studies; THERMAL-DECOMPOSITION KINETICS; SYSTEM INVOLVING BAS; ACTIVATION-ENERGY; CRYSTALLIZATION KINETICS; CALCIUM HYDROXIDE; CRYSTAL-STRUCTURE; CURING KINETICS; CLEAN PROCESS; HEATING RATE; TEMPERATURE;

D O I：

10.1016/j.powtec.2019.10.088

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Barium sulfide has been widely accepted as a useful barium compound in many fields. To reduce the emission of CO2 through tail gas during the current industrial production of barium sulfide by the black ash method, a new clean process for barium sulfide preparation by barite reduction using elemental sulfur is proposed. Herein, we report a study on the kinetics and thermodynamics of the thermal decomposition of barium sulfate by elemental sulfur. The mechanism of this complicated gas-solid reaction was investigated under non-isothermal conditions, at different heating rates. Four isoconversional methods were used to determine the activation energy. The mechanism model of the barium sulfate decomposition was confirmed using the double equal-double step method. The results suggested that the barium sulfate decomposition followed the Dander D3 spherical symmetry model; the order of the reaction (n = 1.06) was determined using the Came equation. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：1348 / 1354

页数：7

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