Optimization of Hybrid Crystal with SAPO-5/34 on Hydrothermal Stability for deNOx Reaction by NH3  

作　　者：LIN Qingjin LIN Chenlu LIU Jingying LIU Shuang XU Haidi CHEN Yaoqiang DAN Yi 

机构地区：[1]State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute,Sichuan University,Chengdu 610064,P.R.China [2]Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center,College of Chemistry,Sichuan University,Chengdu 610064,P.R.China [3]Institute of New Energy and Low-carbon Technology,Sichuan University,Chengdu 610064,P.R.China [4]National Engineering Laboratory for Mobile Source Emission Control Technology,China Automotive Technology&Research Center,Tianjin 300300,P.R.China [5]Sichuan University FGD(Flue Gas Desulfurization)State Engineering Research Center,Chengdu 610064,P.R.China

出　　处：《Chemical Research in Chinese Universities》2020年第6期1249-1254,共6页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.21802099);the Science and Technology Program of Sichuan Province,China(Nos 2019YFS0498,2018GZ0401).

摘　　要：In order to deal with the challenge of the hydrothermal deactivation of selective catalytic reduction of NO by NH3(NH3-SCR)catalyst and extend its lifetime,a novel Cu/SAPO-5/34 catalyst was prepared,and it almostmaintains its deNOx performance with a high conversion rate of 90%NO,between 175℃and 400℃after under-going the rigorous treatment at 800℃for 12 h.Thus,Cu/SAPO-5/34 is more recalcitrant to the high-temperature hydrothermal deactivation than Cu/SAPO-34.Besides,the formation of N20 is always below 3×10^-6(3 ppm)during the whole reaction temperature.performing an advanced catalytic selectivity.The effect of high-temperature hvdro-thermal treatment on the morphology,structure and texture property,the acid sites,as well as the active copper spe cies were investigated.These characterizations manifest that the optimized high-temperature hydrothermal stability is associated closely with the good structural stability over Cu/SAPO-5/34-HT.which facilitates to preserve reaction sites,and then showing the better hydrothermal stability than Cu/SAPO-34.

关 键 词：Hybrid crystal High-temperature hydrothermal stability Selective catalytic reduction of NO by NH(NH3-SCR) 

分 类 号：O64[理学—物理化学]