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《Journal of Chemical Engineering of Chinese Universities》 2009-02
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SCR of NO_x with C_3H_8 over Co/H-beta Modified by Zn at High GHSV

ZHANG Yan-ting,PAN Hua,LI Wei,SHI Yao(College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310028,China)  
In order to improve the catalytic activity of Co-based catalysts for the selective catalytic reduction(SCR)of NOx by C3H8 at high gas hourly space velocity(GHSV),the Co/H-beta catalyst was modified by Zn,and the bimetal Co-Zn/H-beta catalyst was prepared by impregnation method;its property of SCR for NOx reduction by C3H8 in the presence of excess oxygen and at high GHSV range of 10000~100000 h-1was investigated.The results show that the catalytic activity of the prepared bimetal Co-Zn/H-beta catalyst is higher than that of single metal Co/H-beta and Zn/H-beta catalysts,and the maximum NOx conversion ratio of about 95%over the Co-Zn/H-beta catalyst can be reach at 723 K and 20000 h-1.It was considered that there exists cooperative effect between the Zn and Co in Co-Zn/H-beta catalyst;the oxidation of C3H8 is inhibited effectively by Zn addition,and the NO oxidation to NO2 is enhanced by Co.The prepared Co-Zn/H-beta catalyst shows high activity at high GHSV,and its catalytic NOx conversion ratio almost does not change when the GHSV is in the range of 10000~100000 h-1.
【Fund】: 国家自然科学基金项目(20476095)
【CateGory Index】: O643.3
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1 ZHANG Hui1, FANG He-liang 2, LI Wei 1, TAN Tian-en1, ZHENG Xiao-ming2 (1. Institute of Environmental Engineering, Zhejiang University, Hangzhou 310027, China; 2. Institute of Catalysis, Zhejiang University, Hangzhou 310028, China);Selective Catalytic Reduction of NO_x by CH_4 over H-USY Supported MnO_x Catalysts[J];Journal of Chemical Engineering of Chinese Universities;2006-05
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