1. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China; 2. Beijing Jingyi Atmospheric Environmental Protection Technology Co., Ltd, Beijing 100022, China
Abstract:La/Fe-beta zeolite catalyst was prepared by using impregnation method and used for CO selective catalytic reduction of N2O. The results showed that the doping of La could enhance the CO oxidation activity, and thus improved the N2O conversion efficiency of Fe-beta zeolite, reaching higher than 95% at 350℃. H2-TPR results illustrated that the existence of La could influence the distribution of Fe species on La/Fe-beta surface, and reduce the resistance for O2 and H2O. In addition, effects of HCl on Fe-beta and La/Fe-beta zeolites in waste incineration tail gas were also investigated. Combining the results of CO oxidation activities, H2-TPR and O2-TPD, it was found that the formation of stable FeClx species, poor reduction performance and CO oxidation activity were the main causes of HCl poisoning in N2O conversion activity.
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