An investigation on catalytic performance and reaction mechanisms of Fe/OMS-2 for the oxidation of carbon monoxide, ethyl acetate, and toluene  

作　　者：Ning Dong Mengyue Chen Qing Ye Dan Zhang Hongxing Dai 

机构地区：[1]Key Laboratory of Beijing on Regional Air Pollution Control,Department of Environmental Science,School of Environmental and Chemical Engineering,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China [2]Beijing Key Laboratory for Green Catalysis and Separation,Key Laboratory of Beijing on Regional Air Pollution Control,Key Laboratory of Advanced Functional Materials,Education Ministry of China,and Laboratory of Catalysis Chemistry and Nanoscience,Department of Environmental Chemical Engineering,School of Environmental and Chemical Engineering,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China

出　　处：《Journal of Environmental Sciences》2022年第2期258-268,共11页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 21277008 and 20777005);National Key Research and Development Program of China (No. 2017YFC0209905);Natural Science Foundation of Beijing (No. 8082008 )。

摘　　要：The octahedral molecular sieve(OMS-2)-supported Fe( xFe/OMS-2: x = 1, 3, 5, and 10) catalysts were prepared using the pre-incorporation method. Physicochemical properties of the as-synthesized materials were characterized by means of various techniques, and their catalytic activities for CO, ethyl acetate, and toluene oxidation were evaluated. Among all of the samples, performed the best, with the reaction temperature required to achieve 90% conversion( T 90%) being 160 ℃ for CO oxidation, 210 ℃ for ethyl acetate oxidation, and 285 ℃ for toluene oxidation. Such a good catalytic performance of 5Fe/OMS-2 was associated with its high(Mn^(3+) + Mn^(2+)) content and adsorbed oxygen species concentration, and good lowtemperature reducibility and lattice oxygen mobility as well as strong interaction between Fe and OMS-2. In addition, catalytic mechanisms of the oxidation of three pollutants over the 5Fe/OMS-2 catalyst were also studied. It was found that CO, ethyl acetate or toluene was first adsorbed, then the related intermediates were formed, and finally the formed intermediates were completely converted into CO_(2) and H_(2)O.

关 键 词：Cryptomelane-type OMS-2 Supported iron catalyst CO oxidation Volatile organic compound oxidation Toluene oxidation 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]