文献类型：期刊文献

英文题名：Kinetics and Reaction Mechanism of Catalytic Oxidation of Ammonium Sulfite

作者：Guo, Shaopeng[1];Wang, Jiahua[2];Chen, Xin[3];Zhang, Jia[1];Zhang, Rui[1];Lu, Jun[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China;[2]MWH Environm Engn Shanghai Co Ltd, Shanghai 201103, Peoples R China;[3]SINOPEC Ningbo Engn Co Ltd, Ningbo 315103, Zhejiang, Peoples R China

年份：2014

卷号：26

期号：1

起止页码：69

外文期刊名：ASIAN JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000330294400018)】；

基金：The present work was supported by the project cooperating with SINOPEC Ningbo Research Institute of Technology and Shanghai Leading Academic Discipline Project (No. B506).

语种：英文

外文关键词：Kinetics; Mechanism; Catalyst; Ammonium sulfite; Ammonia-based flue gas desulphurization

摘要：The effects of five catalysts on the oxidation rate of ammonium sulfite were compared by intrinsic experiments using self-designed bath reactor. Fe2+ was turned out to be a good catalyst for oxidation of ammonium sulfite. Using stirred bubbling reactor, the kinetics of catalytic oxidation of sulfite in the ammonium-based wet flue gas desulfurization process were investigated by varying concentrations of (NH4)(2)SO4, (NH4)(2)SO3 and Fe2+, pH, air flow rate and temperature. The reaction was found to be first order with respect to ammonium sulfite, 0.4 order with respect to Fe (2+) and the oxidation could reach the maximum rate when pH value was close to 6. The mechanism of the oxidation was discussed and concluded that the oxidation is controlled by diffusion of oxygen.