文献类型：期刊文献

英文题名：Effect of the oxidation of activated carbon by hydrogen peroxide on its catalytic activity in the regeneration of Co(II)TETA

作者：Li, Zi-Qiu[1];Chen, Pei-Yun[1];Long, Xiang-Li[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]State Key Lab Chem Engn, East China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2023

卷号：101

期号：12

起止页码：6740

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20232114126102);WOS:【SCI-EXPANDED(收录号:WOS:000993174900001)】；

语种：英文

外文关键词：activated carbon; catalysis; cobalt (II) triethylene tetramine; hydrogen peroxide; nitric oxide

摘要：Cobalt(II) triethylenetetramine (Co(II)TETA) formed by soluble cobalt(II) salt combining with triethylenetetramine will be used as a wet denitration technique since it can interact with nitric oxide to accomplish quick absorption of NO from gas phase. However, the oxygen in the flue gas will oxidize Co(II)TETA to Co(III) TETA, resulting in the reduction of denitrification efficiency. Activated carbon has been used to promote the regeneration of Co(II)TETA due to its unique surface characteristics. Hydrogen peroxide solution is utilized as a modifier in the carbon modification to improve the catalytic performance of activated carbon. The experiments demonstrate that the best regeneration efficiency of Co(II)TETA is gained by the modified carbon impregnated in 0.05 mol L-1 H2O2 solution at 70 degrees C for 12 h with a solid/liquid ratio of 1/50 (g/mL) followed being activated at 400 degrees C for 2 h in N-2. After being treated with hydrogen oxide solution, the surface area and acidity of the carbon is increased. Continuous experiments reveal that the NO removal efficiency gained by modified activated carbon is about 8.36% higher than that gained by the original carbon.