Reactive characteristics of sulfur dioxide in the application of calcium chloride absorption method

被引：0

作者：

Su L. ^{[1
]}

Du Q. ^{[1
]}

Wang Y. ^{[1
,2
]}

Li X. ^{[1
]}

Wang M. ^{[1
]}

Gao J. ^{[1
]}

Dong P. ^{[1
]}

机构：

[1] School of Energy Science and Engineering, Harbin Institute of Technology, Harbin

[2] College of Vehicles and Energy, Yanshan University, Qinhuangdao, 066004, Hebei

来源：

Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2018年 / 50卷 / 11期

关键词：

Calcium Chloride; Heterogeneous reaction; Salt absorption method; Shrinking core model; SO[!sub]2[!/sub; SO[!sub]3[!/sub; Sulfuric acid mist;

D O I：

10.11918/j.issn.0367-6234.201712012

中图分类号：

学科分类号：

摘要：

The main objectives are to explore the possible SO2 conversion reactions under the condition of calcium chloride absorption method (CCAM) and the effects of these reactions on SO3 measurement by the CCAM. The vertical-horizontal tube furnace and variable-controlling approach were used to study the influences of water vapor, oxygen atmosphere, temperature, reactant concentration on the chemical reaction between SO2 and CaCl2. On this basis, the possible chemical reaction mechanisms of SO2 and CaCl2 and the effects on SO3 measurement were analyzed theoretically. The results showed that SO2 could not undergo the homogeneous reactions in the absence of CaCl2. Under typical conditions of CCAM, only when H2O and O2 existed simultaneously, an obvious chemical reaction between SO2 and CaCl2 could occur. The conversion rate of SO2 can be improved with the increase of temperature and reactant concentration and the conversion rate is 2% to 8% approximately. Finally, the theoretical analysis demonstrated that the heterogeneous reaction was extremely week at 200 ℃and under typical sampling atmosphere, and this reaction was severely inhibited in the presence of high concentration of gaseous H2SO4. Therefore, the effect of SO2 interference on SO3 measurement could be ignored, which proved the feasibility of the CCAM to some extent. © 2018, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

引用

页码：178 / 184

页数：6

共 29 条

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