%0 Journal Article
%T Study on the SCR of NO over Automobile Exhaust Catalyst Ag/SAPO-34<br>汽车尾气净化催化剂Ag/SAPO-34选择性催化还原NO
%A Zhang Ping
%A Wang Lefu
%A Li Xuehui
%A <br>张平
%A 王乐夫
%A 李雪辉
%J 环境科学
%D 2002
%I 
%X The activity of Ag/SAPO-34 molecular sieve catalyst was investigated, and the selective catalytic reduction (SCR) of NO was studied by in-situ diffuse reflectance FTIR spectroscopy(DRIFTS). The results show that the prepared catalyst had high activity at low temperature and the conversion of NO reduction to N2 was about 70% at 3.6% O2 and 573K-673K of temperature. The catalysis activity rised with the concentration of C3H6 but light decrease with GHSV. Based on in-situ DRIFTS, a reaction mechanism was proposed that NO, propene and oxygen react to form organo-nitro and organo-nitro adsorbed species as key intermediates, then these intermediates were decompose to nitrogen. NO and propene were easily activated in oxygen. Furthermore, the presence of oxygen is necessary to form a series of intermediates.
%K lean burn condition
%K automobile exhaust
%K Ag/SAPO-34
%K in situ DRIFTS
%K SCR reaction
%K NO<br>贫燃条件
%K 汽车尾气
%K Ag/SAPO-34
%K 原位漫反射红外光谱
%K 选择性催化还原
%K NO
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=0E5B2A0294C83A1C&yid=C3ACC247184A22C1&vid=EA389574707BDED3&iid=B31275AF3241DB2D&sid=BC12EA701C895178&eid=C5154311167311FE&journal_id=0250-3301&journal_name=环境科学&referenced_num=11&reference_num=11