An in-situ DRIFTS study in the reaction between NO_x and soot on BaAl_2O_4  

作　　者：LI YingJie LIN He SHANGGUAN WenFeng HUANG Zhen 

机构地区：[1]Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiaotong University, Shanghai 200240,China [2]Shanghai Academy of Environmental Science, Shanghai 200233, China

出　　处：《Chinese Science Bulletin》2008年第16期2462-2470,共9页

基　　金：the National Natural Science Foundation of China (Grant No. 50506015); Shanghai Rising-Star Program (Grant No. 06QA14027)

摘　　要：The interactions between NO, O2 and their mixture on BaAl2O4, as well as the reaction of NOx with soot in the presence of O2, have been investigated using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). NO adsorption produces only nitrites species in the absence of O2. NO2 ad- sorption produces nitrates species besides nitrites species. The produced nitrites will further react with O2, O-su rf and O l2-att ice to form nitrates. The reaction of NOx with soot begins with the reaction of ni- trates with soot oxygenated complex (C(O)), which is regarded as the key and rate determining step. A reaction pathway is proposed for the catalyzed reaction of NOx with soot in the presence of O2.The interactions between NO, O2 and their mixture on BaAl2O4, as well as the reaction of NOx with soot in the presence of O2, have been investigated using Diffuse Reflectance Infrared Fourier Transform Spectroscopy （DRIFTS）. NO adsorption produces only nitrites species in the absence of O2. NO2 adsorption produces nitrates species besides nitrites species. The produced nitrites will further react with O2, Osurf^-. and Olattice^2- to form nitrates. The reaction of NOx with soot begins with the reaction of nitrates with soot oxygenated complex （C（O））, which is regarded as the key and rate determining step. A reaction pathway is proposed for the catalyzed reaction of NOx with soot in the presence of O2.

关 键 词：BaAl2O4 飘移 反作用力 NOx 

分 类 号：O4[理学—物理]