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Preferential oxidation of CO on Ni/CeO2 catalysts in the presence of excess H2 and CO2

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Abstract

Preferential oxidation of CO (CO-PROX) was carried out over Ni supported on CeO2 prepared by the co-precipitation method. The influence of metal loadings (2.5, 5 and 10 wt.% Ni) and the reaction conditions such as reaction temperature and feed composition on CO oxidation and oxidation selectivity were evaluated by using dry reformate gas. No other reactions like CO or CO2 methanation, coking, reverse water gas shift (RWGS) reaction is observed in the temperature range of 100–200 °C on these catalysts. Hydrogen oxidation dominates over CO oxidation above the temperature of 200 °C. An increase in oxygen leads to an increase in CO conversion but a simultaneous decrease in the O2 selectivity. It has been noticed that 5 and 10 % Ni/CeO2 show better catalytic activity towards CO-PROX reaction. These catalysts were characterized by SBET, XRD, TEM, XPS and H2-TPR.

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Acknowledgments

SM and MSH are thankful to Council of Scientific and Industrial Research, Government of India for the award of Senior Research Fellowship and Emeritus Scientist Fellowship, respectively.

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Authors and Affiliations

  1. Catalysis Division, CSIR-National Chemical Laboratory, Pune, 411008, India

    Sachin Malwadkar & C. V. V. Satyanarayana

  2. Surface Engineering Division, CSIR-National Aerospace Laboratories, Bangalore, 560017, India

    Parthasarathi Bera

  3. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560012, India

    M. S. Hegde

Authors
  1. Sachin Malwadkar
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  2. Parthasarathi Bera
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  3. M. S. Hegde
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  4. C. V. V. Satyanarayana
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Correspondence to Sachin Malwadkar.

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Malwadkar, S., Bera, P., Hegde, M.S. et al. Preferential oxidation of CO on Ni/CeO2 catalysts in the presence of excess H2 and CO2 . Reac Kinet Mech Cat 107, 405–419 (2012). https://doi.org/10.1007/s11144-012-0477-6

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  • DOI: https://doi.org/10.1007/s11144-012-0477-6

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