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<p>Investigation of methane bi-reforming over Ni-impregnated La<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> mixed oxide catalysts to produce hydrogen-rich syngas. A series of supports with varying molar ratios of La-Zr were synthesized using the co-precipitation method, and the metal addition was carried out using the impregnation method. The properties of the materials are characterized by different characterization techniques such as BET, XRD, H<sub>2</sub>-TPR, and CO<sub>2</sub>-TPD analyses. The overall characterization illustrated that the change in the mole ratio of La<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> support improves catalyst performance by enhancing CO<sub>2</sub> adsorption and metal-support interactions and reducing carbon deposition. 12 wt% Ni loading catalyst with La<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> molar ratio of 3:1 showed optimal performance, yielding high methane and CO<sub>2</sub> conversion rates (90% and 75%, respectively) and achieving H<sub>2</sub> yield of 82%. Further, the catalyst demonstrated stability over a 100&#xa0;h reaction time, ascribed to the strong metal-support interaction along with the change in the basicity with change in the La<sub>2</sub>O<sub>3</sub>, which improves the overall bi-reforming methane reactivity and enhances syngas production.</p>

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Studies of Ni Supported on La-Zr Mixed Oxide Catalysts for Bi-reforming of Methane with CO2 to Syngas

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • G. Mallikarjun,
  • P. Shiva Kumar,
  • K. Ranjith Kumar,
  • P. Mahesh Kumar,
  • P. Chandrasekhar,
  • T. V. Sagar,
  • N. Lingaiah

摘要

Investigation of methane bi-reforming over Ni-impregnated La2O3-ZrO2 mixed oxide catalysts to produce hydrogen-rich syngas. A series of supports with varying molar ratios of La-Zr were synthesized using the co-precipitation method, and the metal addition was carried out using the impregnation method. The properties of the materials are characterized by different characterization techniques such as BET, XRD, H2-TPR, and CO2-TPD analyses. The overall characterization illustrated that the change in the mole ratio of La2O3-ZrO2 support improves catalyst performance by enhancing CO2 adsorption and metal-support interactions and reducing carbon deposition. 12 wt% Ni loading catalyst with La2O3-ZrO2 molar ratio of 3:1 showed optimal performance, yielding high methane and CO2 conversion rates (90% and 75%, respectively) and achieving H2 yield of 82%. Further, the catalyst demonstrated stability over a 100 h reaction time, ascribed to the strong metal-support interaction along with the change in the basicity with change in the La2O3, which improves the overall bi-reforming methane reactivity and enhances syngas production.