文献类型：期刊文献

英文题名：Simultaneous removal of NO and SO₂ with hexamminecobalt(II) solution coupled with the hexamminecobalt(II) regeneration catalyzed by activated carbon

作者：Long, XL; Xin, ZL; Wang, HX; Xiao, WD; Yuan, WK

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

年份：2004

卷号：54

期号：1

起止页码：25

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000224354900004)】；

语种：英文

外文关键词：nitric oxide; catalytic reduction; activated carbon; hexamminecobalt; absorption

摘要：The wet ammonia desulfurization process can be retrofitted for combined removal Of SO2 and NO from the flue gases by adding soluble cobalt(II) salt into the aqueous ammonia solution. Activated carbon is used to catalyze the reduction of hexamminecobalt(III) to hexamminecobalt(II) to maintain the capability of removing NO of the hexamminecobalt solution. The effects of temperature, pH, activated carbon particle size, and superficial liquid flow velocity on hexamminecobalt(III) conversion have been investigated. An apparent activation energy is obtained. According to the experimental results, the catalytic reduction reaction rate increases with temperature. The batch reactor experiments show that the best pH range lies in between 3.5 and 6.5. In a fixed-bed reactor, superficial liquid flow velocity obviously affects the reaction and a high yield of cobalt(II) is obtained at a pH value lower than 9.0. The experiments manifest that the hexamminecobalt solution coupled with catalytic regeneration of hexamminecobalt(II) can maintain a high nitric oxide removal efficiency during a period of time. (C) 2004 Elsevier B.V. All rights reserved.