Preparation of NOx Converting Catalysts for Diesel Engine Exhaust to Meet China Ⅵ Emission Limit Requirement

WEI Xiaxia; TAN Zongyong; CHEN Mengyin; LIU Laijun; TANG Fushun; SUN Qiang; LIU Guangwen

doi:10.3969/j.issn.1001-2222.2021.01.012

Vehicle Engine ›› 2021, Vol. 0 ›› Issue (1) : 69. DOI: 10.3969/j.issn.1001-2222.2021.01.012

Preparation of NO_x Converting Catalysts for Diesel Engine Exhaust to Meet China Ⅵ Emission Limit Requirement

WEI Xiaxia¹,TAN Zongyong¹,CHEN Mengyin¹,LIU Laijun¹,TANG Fushun¹,SUN Qiang²,LIU Guangwen²

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Abstract

The effects of loading methods of active components on the SCR performance of V₂O₅-WO₃/TiO₂catalyst 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 steadystate conditions. The results showed that the loading methods of active components had great influence on the SCR performance of V₂O₅-WO₃/TiO₂ catalyst. WO_x species and VO_x 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 NO_xconversion of diesel engine exhaust which meet China Ⅵ emission limit requirement.

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diesel engine / selective catalytic reduction(SCR) / catalyst / preparation

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WEI Xiaxia,TAN Zongyong,CHEN Mengyin,LIU Laijun,TANG Fushun,SUN Qiang,LIU Guangwen. Preparation of NO_x Converting Catalysts for Diesel Engine Exhaust to Meet China Ⅵ Emission Limit Requirement[J]. Vehicle Engine. 2021, 0(1): 69 https://doi.org/10.3969/j.issn.1001-2222.2021.01.012