文献类型：期刊文献

英文题名：Kinetics of the [Fe(III)-EDTA]^- Reduction by Sulfite under the Catalysis of Activated Carbon

作者：Yang, Xiao-juan[1];Yang, Lin[1];Dong, Li[1];Long, Xiang-li[1];Yuan, Wei-kang[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：25

期号：10

起止页码：4248

外文期刊名：ENERGY & FUELS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000296212900003)】；

基金：The present work is supported by the Ministry of Science and Technology of China (No. 2006AA05Z307) and the State Key Laboratory of Chemical Engineering (SKL-ChE-08C05).

语种：英文

摘要：The simultaneous removal of SO2 and NO from the flue gases with the [Fe(II)-EDTA](2-) solution has not been put into commercial application because of the quick oxidation of [Fe(II)-EDTA](2-) to [Fe(III)-EDTA](-). Activate carbon has been proposed to catalyze the reduction of [Fe(III)-EDTA](-) by the sulfite produced from the dissolution of SO2. In this paper, the kinetics of [Fe(III)-EDTA](-) reduction catalyzed by coconut activated carbon has been investigated in a stirred-cell reactor. The experimental results indicate that the activated carbon can obviously accelerate the [Fe(III)-EDTA](-) reduction rate. The reaction rate increases with the concentrations of [Fe(III)-EDTA](-) and sulfite. An optimal pH for the reduction of [Fe(III)-EDTA](-) is obtained at 6.34. Raising the temperature can increase the [Fe(III)-EDTA](-) conversion. The intrinsic activation energy for this catalytic reaction obtained is 55.63 +/- 1.12 kJ mol(-1). The experiments manifest that a high NO removal efficiency can be maintained for a long period of time with the [Fe(II)-EDTA](2-) solution coupled with the Fe(II) regeneration catalyzed by activated carbon. A kinetic equation describing the reduction of [Fe(III)-EDTA](-) by sulfite catalyzed with activated carbon was developed.