Effect of H_2O on NO Reduction over NSR Catalyst 12CaO·7Al_2O_3/10%K  

NSR催化剂12CaO·7Al_2O_3／10%K中水对NO还原性能的影响(英文)

作　　者：高爱梅[1] 王华静 屠兢[1] 李全新[1] 

机构地区：[1]中国科学技术大学化学物理系,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2006年第6期555-558,共4页化学物理学报（英文）

摘　　要：A novel NOx storage/reductiou catalyst 12CaO·7Al2O3/10%K, defined as C12A7/K, was prepared, which possesses good NOx storage/reduction ability with a high sulfur-tolerance. The effect of H2O on the NO reduction features over the C12A7/K catalyst was investigated, The NO eonversion and the N2 selectivity were measured as a function of temperature and H2O concentration. In the presence of 1.2% H2O, both the NO conversion and the N2 selectivity significantly decrease at lower temperature region （〈500 ℃）. At temperatures over 500℃, however, the NO reduction is only slightly influenced by H2O, The species of NO3^-/NO2^- are confirmed as main storage components in the C12A7/K catalyst, which are thrther reduced into N2 by H2 under the reduction conditions.

关 键 词：NO reduction WATER N2 selectivity 

分 类 号：O643.36[理学—物理化学]