丙烯选择催化还原NO的研究  

SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDE BY PROPYLENE

作　　者：周黎明[1] 陈光文[1] 王树东[1] 吴迪镛[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《化工学报》2003年第2期199-203,共5页CIESC Journal

基　　金：国家"8 63"高技术项目 (No 2 0 0 1AA6430 40 )~~

摘　　要：在以蜂窝陶瓷为载体的Pt/Al2 O3催化剂上 ,对采用丙烯选择催化还原方法来脱除稀燃发动机尾气中NO的反应进行了实验与理论研究 .建立了一维非均相反应模型 ,对反应过程进行了模拟 ,从实验与理论两方面讨论了反应温度、反应物浓度、通道特征尺度等因素的影响 ;并对反应过程中的内。The reaction of selective catalytic reduction (SCR) of nitrogen oxide (NO) in lean-burning engine exhaust with propylene was studied on Pt/γ-Al2O3 supported by monolith honeycomb. A one-dimensional heterogeneous model was set up to simulate the process behavior of reactions, and the effects of factors, such as reaction temperature, reactant concentration, dimension of channel of monolith catalyst, were discussed in detail both by experiment and theory. The results predicted by the model were tested through experiments. With this model, the effects of inter- and intra-phase diffusion and other factors are discussed. The model shows that the NO conversion rate will rise when higher concentration C3H6 is used; the influence of hydraulic diameter is small; the reaction is controlled by the kinetics under low temperature and after the light off of C3H6 the internal diffusion becomes serious.

关 键 词：丙烯 选择催化还原 NO 一维非均相模型 扩散 一氧化氮 发动机 尾气 铂催化剂 

分 类 号：X701[环境科学与工程—环境工程]