贫燃条件下汽车尾气净化催化剂-Ag-SAPO-34的研究  

Study on the Ag-SAPO-34 automobile exhaust catalyst under lean-burn condition

作　　者：王乐夫[1] 李雪辉[1] 谭宇新[2] 许守聪[1] 

机构地区：[1]华南理工大学化工学院,广州510640 [2]广州市交通委员会

出　　处：《天然气化工—C1化学与化工》2001年第1期1-4,8,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金项目! (2 0 0 76 0 17);广东省自然科学基金资助项目

摘　　要：研究了Ag SAPO 34催化剂的制备工艺和反应条件对催化剂活性的影响。所研制的Ag SAPO 34活性高且低温活性好 ,在氧气浓度为 3 6 % (V)和温度为 34 0℃时 ,NO还原成N2 的转化率达到最大值 74 1%。催化剂制备最适宜的AgNO3 离子交换溶液的pH值为 7 0 ;离子交换温度为 40℃ ;离子交换后焙烧温度为 6 0 0℃。催化剂活性随C3 H6浓度的增加而升高 。The effects of preparation technique and reaction conditions of Ag-SAPO-34 catalyst on the catalyst activity are studiedThe Ag-SAPO-34 catalyst which is active at low temperature has been prepared, on which the highest conversion of NO reduction to N_2 is 741% at the oxygen concentration of 36Vol% and the temperature of 340℃ The most suitable pH value of the ion exchanged AgNO_3 solution and ion exchanged temperature are 70 and 40℃ respectively, and the calcined temperature is 600℃ The catalytic activity rises with the concentration of C_3H_6 and decreases with GHSV

关 键 词：贫燃条件 汽车尾气净化催化剂 催化活性 磷酸硅铝分子筛 银 负载催化剂 

分 类 号：TQ426.96[化学工程] O643.361[理学—物理化学]