Effects of preparation conditions on catalytic performance of Ag/ZSM-5 catalysts for selective catalytic reduction of NO by CH4
WEI Bo1,2, ZHANG Xiang-jun2,3, LI Si-xuan1,2, CHI Yao-ling2, WANG Hong2, LI Cui-qing2, SONG Yong-ji2
1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 2. Beijing Municipal Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; 3. Sinopec Jinan Company, Jinan 250101, China
Abstract: Ag/ZSM-5 catalysts are prepared by wet impregnation method and characterized through X-ray diffraction (XRD),NH3 temperature-programmed desorption (NH3-TPD) and NO temperature-programmed desorption (NO-TPD).The effects of calcining atmosphere and calcining temperature on the performance of the prepared catalysts are also studied.The experimental results show that the calcining atmosphere has significant impacts on the forms of Ag species in catalysts,acidic amount of catalysts and NO adsorption/desorption performance over Ag/ZSM-5.The calcining temperature also affects the acidic property and acidic amount of catalysts.The catalyst calcined at 800℃ in nitrogen atmosphere exhibits better activity in NO removal via CH4-SCR.The catalyst calcined at 350℃ can bring about the biggest NO conversion of 42%.
魏波, 张相俊, 李思漩, 迟姚玲, 王虹, 李翠清, 宋永吉. 制备条件对Ag/ZSM-5催化剂CH4-SCR脱硝性能的影响[J]. 现代化工, 2018, 38(7): 103-106,108.
WEI Bo, ZHANG Xiang-jun, LI Si-xuan, CHI Yao-ling, WANG Hong, LI Cui-qing, SONG Yong-ji. Effects of preparation conditions on catalytic performance of Ag/ZSM-5 catalysts for selective catalytic reduction of NO by CH4. Modern Chemical Industry, 2018, 38(7): 103-106,108.
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