(1.College of Chemistry and Bioengineering,College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;2.Guangxi Splendid Lang Jie Environmental Protection Technology Co.,Ltd.,Beihai 536000,China)
The effects of loading methods of active components on the SCR performance of V2O5-WO3/TiO2 catalyst were studied, the low-temperature window characteristics of catalyst improved by changing the assistant components, and the catalytic performance of prepared honeycomb catalyst sample was investigated under steadystate conditions. The results showed that the loading methods of active components had great influence on the SCR performance of V2O5-WO3/TiO2 catalyst. WOx species and VOx species were evenly dispersed on the surface of TiO2 carrier with better SCR activity for the V2O5-WO3/TiO2 catalyst prepared by co-impregnation method. Meanwhile, the low temperature SCR performance significantly improved through the modulation of CeO2 and SnO2 components. The steady-state condition test results showed that the CeO2 and SnO2 modified V2O5-WO3/TiO2 honeycomb catalyst samples prepared by co-impregnation method had stable and excellent SCR performance at low temperature and had potential commercial value for the NOx conversion of diesel engine exhaust which meet China Ⅵ emission limit requirement.
