文献类型：期刊文献

英文题名：A study on the reduction of [Fe(III)-EDTA]- catalyzed with activated carbon in a fixed-bed

作者：Yang, Xiao-Juan[1];Zhu, Hai-Song[1];Yang, Lin[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：2013

卷号：32

期号：2

起止页码：206

外文期刊名：ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY

收录：;EI(收录号：20131716227395);WOS:【SCI-EXPANDED(收录号:WOS:000317851600007)】；

基金：The present work is supported by the Ministry of Science and Technology of China (No. 2006AA05Z307), National Natural Science Foundation of China (No. 21176081), and the state key laboratory of chemical engineering (SKL-ChE-08C05).

语种：英文

外文关键词：reduction; catalysis; [Fe(III)-EDTA]; activated carbon; nitric oxide

摘要：The simultaneous control of SO2/NOX can be realized with the [Fe(II)-EDTA]2 aqueous solution. However, the [Fe(II)-EDTA]2 is easily oxidized to [Fe(III)-EDTA] by oxygen, which has no ability to bind NO. The reduction of [Fe(III)-EDTA] to [Fe(II)-EDTA]2 is a key to the maintenance of the NO removal efficiency with the [Fe(II)-EDTA]2 aqueous solution. The reduction of [Fe(III)-EDTA] can be accomplished by sulfite produced by SO2 dissolving in the aqueous solution under the catalysis of activated carbon. The experiments were performed in a fixed-bed reactor to investigate the regeneration of [Fe(II)-EDTA]2 catalyzed by activated carbon. The influences of [Fe(III)-EDTA] and sulfite concentrations, pH, liquid flow, temperature, on [Fe(III)-EDTA] catalytic reduction have been tested. The experimental results indicate that the [Fe(III)-EDTA] reduction increases with the [Fe(III)-EDTA] and sulfite concentrations. Raising the temperature can increase the [Fe(III)-EDTA] conversion. The optimal pH range for the reduction of [Fe(III)-EDTA] is 5.77.5. The apparent activation energy determined from the experimental results is 35.2 +/- 0.5 kJ mol1. The continuous experiment manifests that simultaneous removal of NO and SO2 with the [Fe(II)-EDTA]2 solution coupled with the Fe(II) regeneration catalyzed by activated carbon can be maintained at a high NO removal efficiency for a long period of time. The kinetic equation of [Fe(III)-EDTA]- reduction by sulfite catalyzed with activated carbon can be described as r = k 2 k 1 KC[Fe(III)EDTA]1/n C H + C SO32 k 1 C EDTA ( 1 + C H + / Ka ) + k 2 C SO32 center dot b epsilon (c) 2012 American Institute of Chemical Engineers Environ Prog, 32: 206-212, 2013