摘要 研究Ａｇ－ＺＳＭ－５催化剂上ＣＨ４选择性催化还原ＮＯｘ的反应性能,采用ＴＰＤ和ＴＰＳＲ技术研究ＮＯ和Ｏ２共吸附于Ａｇ－ＺＳＭ－５催化剂表面形成的吸附物种及其和ＣＨ４之间的反应．结果表明,Ａｇ－ＺＳＭ－５催化剂上ＣＨ４选择性还原ＮＯｘ活性和选择性较高．ＮＯ和Ｏ２共吸附在Ａｇ－ＺＳＭ－５催化剂上形成的ＮＯ３(ｓ)吸附物种能被ＣＨ４还原生成Ｎ２．在ＮＯ３(ｓ)和Ｏ２共存的体系中,ＣＨ４能优先并选择性还原ＮＯ３(ｓ)生成Ｎ２． Abstract The catalytic performance of selective catalytic reduction of NOx on Ag-ZSM-5 catalyst was studied. The adsorption of NO and O2 on the surface of Ag-ZSM-5 catalyst was studied by TPD and TPSR techniques, and their interactions with CH4 . The results show that selective reduction of CH4 on Ag-ZSM-5 catalyst has high activity and selectivity for NOx. The NO3 (s) adsorbed species co-adsorbed on Ag-ZSM-5 catalyst by NO and O2 can be reduced to N2 by CH4. In the coexistence of NO3 (s) and O2, CH4 preferentially and selectively reduces NO3 (s) to N2.