| Cu-Mn-Ce ternary mixed-oxide catalysts for catalytic combustion of toluene |
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| 作者姓名： | Hanfeng Lu Xianxian Kong Haifeng Huang Ying Zhou Yinfei Chen |
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| 作者单位： | Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China,College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China,College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China,Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China,Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China |
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| 摘 要： | Cu–Mn, Cu–Mn–Ce, and Cu–Ce mixed-oxide catalysts were prepared by a citric acid sol–gel method and then characterized by XRD, BET, H_2-TPR and XPS analyses. Their catalytic properties were investigated in the toluene combustion reaction. Results showed that the Cu–Mn–Ce ternary mixed-oxide catalyst with 1:2:4 mole ratios had the highest catalytic activity, and 99% toluene conversion was achieved at temperatures below 220°C. In the Cu–Mn–Ce catalyst, a portion of Cu and Mn species entered into the Ce O_2 fluorite lattice, which led to the formation of a ceria-based solid solution. Excess Cu and Mn oxides existed on the surface of the ceria-based solid solution. The coexistence of Cu–Mn mixed oxides and the ceria-based solid solution resulted in a better synergetic interaction than the Cu–Mn and Cu–Ce catalysts, which promoted catalyst reducibility, increased oxygen mobility, and enhanced the formation of abundant active oxygen species.
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| 收稿时间： | 2014/8/30 0:00:00 |
| 修稿时间： | 2014/10/28 0:00:00 |
Cu-Mn-Ce ternary mixed-oxide catalysts for catalytic combustion of toluene |
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| Hanfeng Lu,Xianxian Kong,Haifeng Huang,Ying Zhou,Yinfei Chen.Cu-Mn-Ce ternary mixed-oxide catalysts for catalytic combustion of toluene[J].Journal of Environmental Sciences,2015,27(6):102-107. |
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| Authors: | Hanfeng Lu Xianxian Kong Haifeng Huang Ying Zhou and Yinfei Chen |
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| Affiliation: | 1. Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
2. College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, China |
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| Abstract: | Cu–Mn, Cu–Mn–Ce, and Cu–Ce mixed-oxide catalysts were prepared by a citric acid sol–gel method and then characterized by XRD, BET, H2-TPR and XPS analyses. Their catalytic properties were investigated in the toluene combustion reaction. Results showed that the Cu–Mn–Ce ternary mixed-oxide catalyst with 1:2:4 mole ratios had the highest catalytic activity, and 99% toluene conversion was achieved at temperatures below 220°C. In the Cu–Mn–Ce catalyst, a portion of Cu and Mn species entered into the CeO2 fluorite lattice, which led to the formation of a ceria-based solid solution. Excess Cu and Mn oxides existed on the surface of the ceria-based solid solution. The coexistence of Cu–Mn mixed oxides and the ceria-based solid solution resulted in a better synergetic interaction than the Cu–Mn and Cu–Ce catalysts, which promoted catalyst reducibility, increased oxygen mobility, and enhanced the formation of abundant active oxygen species. |
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| Keywords: | Cu-Mn-Ce mixed oxide Toluene Catalytic combustion Volatile organic compounds (VOCs) |
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