Comparative evaluation of Ni-based bimetallic catalysts for dry reforming of methane at low temperature: The effect of alloy itself on performance

Jeong A. Lee, Yonggyun Bae, Kyungpyo Hong, Jongsup Hong

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Dry reforming of methane assisted by 5 wt% Ni-X alloy catalysts (X: Co, Cu, Pd, and Rh) anchored on γ-alumina is evaluated for comparing the synergetic effect of alloys at once as catalysts for dry reforming of methane at low temperatures of 400°C-600°C. Characterization of catalysts confirms alloy formation, structural properties, and adsorption properties that affect the performance of each bimetallic catalyst. Catalytic performance is evaluated from the perspective of initial activity, syngas production and selectivity, long-term stability, as well as energy efficiency at powder level not previously addressed, followed by post-analysis for carbon formation. The results show that Ni-Rh/Al2O3 and Ni-Co/Al2O3 are highly active and stable during the reaction. Ni-Rh/Al2O3 shows higher CH4 and CO2 conversions at 550°C as 32.71% and 84.69% of those at equilibrium, respectively. Similarly, CH4 and CO2 conversions of Ni-Co/Al2O3 at 550°C are 26.17% and 71.76% of those at equilibrium. They exhibit better long-term stability than a Ni monometallic catalyst, decreasing the degradation rate by 60% for Ni-Rh/Al2O3 and 40% for Ni-Co/Al2O3. Such improvement is even more pronounced when the temperature decreases from 500°C to 400°C, implying their potential as catalysts for dry reforming of methane at low temperatures. However, for every performance indicator, Ni-Pd/Al2O3 and Ni-Cu/Al2O3 exhibit low performance. These tendencies are mainly attributed to the synergetic effect of alloy and apparent activation energies for reactions. Based on such experimental results, it is discussed that Ni-Rh/Al2O3 and Ni-Co/Al2O3 are feasible and promising catalysts for dry reforming of methane even at low temperatures.

Original languageEnglish
Pages (from-to)11228-11249
Number of pages22
JournalInternational Journal of Energy Research
Issue number8
Publication statusPublished - 2022 Jun 25

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2019R1C1C1005152) and in part by the Yonsei‐KIST Convergence Research Program (2Z05900‐19‐P107). i i i i i i 4 2 2 2

Funding Information:
National Research Foundation of Korea, Grant/Award Number: 2019R1C1C1005152; Yonsei‐KIST Convergence Research Program, Grant/Award Number: 2Z05900‐19‐P107 Funding information

Publisher Copyright:
© 2022 John Wiley & Sons Ltd.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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