Enhanced catalytic performance of rare earth-doped Cu/H-Sep for the selective catalytic reduction of NO with C₃H₆

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• 作者：Qing Ye^a ; ^{yeqing@bjut.edu.cn} ; Lina Yan^a ; Haiping Wang^a ; Shuiyuan Cheng^a ; Dao Wang^a ; Tianfang Kang^a ; Hongxing Dai^b ; ^{hxdai@bjut.edu.cn}
• 关键词：Selective catalytic reduction ; NO removal ; Rare earth oxide dopant ; Sepiolite-supported copper oxide catalyst ; Metal&ndash ; support interaction
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：26 July, 2012
• 卷：431-432
• 期：Complete
• 页码：42-48
• 文件大小：1232 K

摘要

The undoped and rare earth oxide (REO_x, RE = La, Ce, Pr, Sm)-doped acid-treated sepiolite (H-Sep)-supported copper oxide catalysts (Cu/H-Sep and RE-Cu/H-Sep; Cu and RE loading = 15 and 4 wt%, respectively) were prepared using the incipient wetness impregnation method. The catalysts were characterized by means of the XRD, BET, XPS, H₂-TPR and NH₃-TPD techniques, and their catalytic activities were evaluated for the selective catalytic reduction (SCR) of NO with propylene. It is shown that the doping of REO_x led to an enhancement in catalytic performance of Cu/H-Sep in the SCR of NO with C₃H₆. Among the RE-Cu/H-Sep catalysts, Ce-Cu/H-Sep performed the best, with 62%NO conversion being achieved at 350 掳C in the (NO + C₃H₆ + O₂) reaction. We believe that the high catalytic performance of Ce-Cu/H-Sep for the SCR of NO with C₃H₆ was associated with the good low-temperature reducibility, high copper oxide dispersion, and strong metal-support interaction.