Insight into SO_(2) poisoning and regeneration of one-pot synthesized Cu-SSZ-13 catalyst for selective reduction of NO_(x) by NH_(3)

作     者：Xin Yong Hong Chen Huawang Zhao Miao Wei Yingnan Zhao Yongdan Li Xin Yong;Hong Chen;Huawang Zhao;Miao Wei;Yingnan Zhao;Yongdan Li

作者机构：School of Environmental EngineeringTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin Key Laboratory of Applied Catalysis Science and TechnologyState Key Laboratory of Chemical Engineering(Tianjin University)School of Chemical EngineeringTianjin UniversityTianjin 300072China Department of Chemical and Metallurgical EngineeringSchool of Chemical EngineeringAalto UniversityEspoo 02150Finland 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第6期

页      面：184-193页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Financial supports from the Natural Science Foundation of Tianjin 19JCTPJC42300 

主　　题：Emission control SCR One-pot synthesis of Cu-SSZ-13 SO_(2)poisoning Activity regeneration 

摘      要：The effects of SO_(2) on an one-pot synthesized Cu-SSZ-13 catalyst for selective reduction of NO_(x) by NH_(3) were *** addition of SO_(2) inhibited NO_(x) conversion significantly below 300℃,while no effect on NO_(x) conversion was observed above 300℃.TGA,TPD,and XPS results showed that the deactivation was caused by the formation of(NH4)2SO_(4),SO_(2) chemisorption on the isolated Cu^(2+)ion sites,as well as the formation of CuSO_(4)-like *** them,the site-blocking effect of(NH_(4))_(2)SO_(4) on Cu^(2+)was the primary reason for ***,89%of deNO_(x) activity of the poisoned catalyst was recovered after thermal treatment at 500℃ in air,where(NH_(4))_(2)SO_(4) was completely *** activity was further recovered with regeneration temperature increasing to 600℃,removing the adsorbed SO_(2) on the Cu^(2+)*** regeneration at 600℃ could not recover the activity completely,because of the high stability of CuSO_(4)-like species.