Mechanism and Kinetics of Sulfite Oxidation in the Presence of Ethanol

被引：37

作者：

Wang, Li-Dong ^{[1
]}

Ma, Yong-Liang ^{[1
]}

Hao, Ji-Ming ^{[1
]}

Zhao, Yi ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China

[2] N China Elect Poweer Univ, Sch Environm Sci & Engn, Baoding 071003, Hebei, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2009年 / 48卷 / 09期

基金：

国家高技术研究发展计划(863计划); 中国博士后科学基金;

关键词：

LIGHT; DESULFURIZATION; INHIBITION;

D O I：

10.1021/ie801731h

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Oxidation of sulfite is all important process in flue gas desulfurization. The inhibitory effects of four inhibitors on the intrinsic oxidation of sulfite were compared, and ethanol was found to be all excellent inhibitor. The intrinsic oxidation kinetics of sulfite in the presence Of ethanol used as all inhibitor was investigated using a batch apparatus. The reaction orders of the reagents and the activation energy were obtained. The results indicate that the intrinsic reaction proceeds in two steps: rapid reaction in all oxygen-rich state and slow reaction in an oxygen-depleted state. Integrated with the macroscopic oxidation kinetics of calcium sulfite in the presence of an ethanol inhibitor, it was concluded that the macroscopic oxidation process is controlled by the intrinsic reaction rate and the intrinsic oxidation reaction proceeds in the rapid reaction state. Furthermore, a mechanism for the intrinsic reaction is proposed based oil a steady-state assumption. The results derived with this mechanism are in good agreement with the experimental results.

引用

页码：4307 / 4311

页数：5

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