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] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2011

卷号：25

期号：10

起止页码：4248

外文期刊名：Energy and Fuels

收录：EI(收录号：20114414462445)

语种：英文

外文关键词：Activation energy - Iron compounds - Reduction - Catalysis - Integral equations - Kinetics

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. ? 2011 American Chemical Society.