Insight into the effects of C_(3)H_(6) on fresh and hydrothermally aged Cu-SSZ-39 catalysts  

作　　者：Jinpeng Du Junlin Chen Yulong Shan Tongliang Zhang Yu Sun Zhongqi Liu Xiaoyan Shi Wenpo Shan Yunbo Yu Hong He 

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,China [4]Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China

出　　处：《Chinese Chemical Letters》2025年第3期164-169,共6页中国化学快报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52200136,52270112);National Energy-Saving and Low-Carbon Materials Production and Application Demonstration Platform Program(No.TC220H06N);Young Elite Scientists Sponsorship Program by CAST(No.2022QNRC001)。

摘　　要：Hydrocarbons(HCs),as major poisoning substances,have a crucial influence on NH_(3)-SCR catalysts.In this work,the effects of C_(3)H_(6)on fresh and hydrothermally aged Cu-SSZ-39 catalysts with different copper contents were investigated.All catalysts suffered a deactivation above 250℃,especially between 300-400℃,which was mainly related to the reaction between NH_(3)and C_(3)H_(6).However,the hydrothermally aged and the high-copper-loaded Cu-SSZ-39 catalysts could achieve a recovery of NH_(3)-SCR performance at high temperatures.Such activity recovery was attributed to the oxidation of C_(3)H_(6)by CuxOy species,which therefore inhibited the reaction between NH_(3)and C_(3)H_(6).As a result,more NH_(3)could be available for the NH_(3)-SCR reaction and the Cu-SSZ-39 catalysts could maintain a good catalytic activity.Based on these findings,we proposed that high loaded Cu-SSZ-39 catalysts with a little CuOx formed are preferred for application.

关 键 词：Diesel vehicle emission NO_(x)abatement NH3-SCR Cu-SSZ-39 zeolite C_(3)H_(6) poisoning 

分 类 号：O643.36[理学—物理化学]