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Influence of Mn Promotion on CO Hydrogenation over Rh/CNTs Catalyst

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Abstract

The influence of manganese promotion on the catalytic performance of Rh/CNTs catalyst for ethanol production from syngas was investigated. With the addition of manganese, CO conversion and ethanol yield increased significantly. The effects of reaction temperature, pressure, and H2/CO molar ratio on the manganese-promoted Rh/CNTs catalyst were studied. With pressure increase, alcohol selectivity increased, while methane selectivity decreased. The high H2/CO molar ratio improved CO conversion and suppressed the formation of CO2. The catalysts were characterized by Brunauer–Emmett–Teller method, X-ray diffraction, transmission electron microscopy, temperature-programmed desorption experiment, and X-ray photoelectron spectroscopy to clarify their physical and chemical properties. It was found that the high activity of the Mn–Rh/CNTs catalyst and the corresponding high ethanol yield were attributed to the small and well dispersed active components and the enhancement of CO dissociation.

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Acknowledgments

The authors acknowledge financial support from the National Science and Technology Supporting Plan Through Contract (No. 2011BAD22B06), the National Natural Science Foundation of China (No. 51276166), the International Science and Technology Cooperation Program of China (No. 2011DFR60190), the Program for New Century Excellent Talents in University (No. NCET-10-0741) and Zhejiang Provincial Natural Science Foundation of China (No. R1110089).

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Authors and Affiliations

  1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, People’s Republic of China

    Shu-rong Wang, Wen-wen Guo, Hai-xia Wang, Ling-jun Zhu & Kun-zan Qiu

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  1. Shu-rong Wang
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  2. Wen-wen Guo
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  3. Hai-xia Wang
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  4. Ling-jun Zhu
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  5. Kun-zan Qiu
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Correspondence to Shu-rong Wang.

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Wang, Sr., Guo, Ww., Wang, Hx. et al. Influence of Mn Promotion on CO Hydrogenation over Rh/CNTs Catalyst. Catal Lett 144, 1305–1312 (2014). https://doi.org/10.1007/s10562-014-1248-y

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  • DOI: https://doi.org/10.1007/s10562-014-1248-y

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