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<p>The dry reforming of ethane offers a promising pathway for the co-utilization of CO<sub>2</sub>, which are two abundant industrial byproducts to produce blue H<sub>2</sub> and CO, enabling sustainable routes toward carbon circularity. This study investigates the performance of CeO<sub>2</sub> supported metal catalysts and the effect of catalyst loading in the dry reforming process across a range of temperatures. Catalyst characterization included H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, CO<sub>2</sub>-TPD, H<sub>2</sub>-TPD, XRD and SEM/EDS mapping to correlate surface acidity, basicity, reducibility, and metal dispersion with catalytic performance. Among all formulations, 2% Rh/CeO<sub>2</sub> showed the highest ethane conversion of ~ 98.5%-91.2% with early reduction behavior, but suffered from minor byproduct of ~ 15 − 12% methane generated from ethane dissociation. Ni/CeO<sub>2</sub> catalysts, especially at 15% loading, demonstrated excellent balance between performance up to 80 − 52% conversion, CO<sub>2</sub> utilization ~ 70 − 48%, with ~ 99% selectivity toward H<sub>2</sub> and CO, and less than 1% formation of methane and ethylene byproducts. Increased Ni loading improved performance due to better reducibility and moderate surface acidity. These findings highlight CeO<sub>2</sub> role in enhancing metal dispersion, particularly Ni/CeO<sub>2</sub> catalyst offers a cost-effective alternative to noble metal of Rh/CeO<sub>2</sub> for dry reforming of ethane, enabling efficient CO<sub>2</sub> valorization for decarbonized energy systems.</p>

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Ethane dry reforming for CO2 utilization and H2 generation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月1日

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  • Zuhair Alyousef,
  • Umer Aizaz,
  • Muhammad H. M. Ahmed,
  • Ahmed Alasseel,
  • Abduljabar Alsayoud,
  • Emad Al-Shafei

摘要

The dry reforming of ethane offers a promising pathway for the co-utilization of CO2, which are two abundant industrial byproducts to produce blue H2 and CO, enabling sustainable routes toward carbon circularity. This study investigates the performance of CeO2 supported metal catalysts and the effect of catalyst loading in the dry reforming process across a range of temperatures. Catalyst characterization included H2-TPR, NH3-TPD, CO2-TPD, H2-TPD, XRD and SEM/EDS mapping to correlate surface acidity, basicity, reducibility, and metal dispersion with catalytic performance. Among all formulations, 2% Rh/CeO2 showed the highest ethane conversion of ~ 98.5%-91.2% with early reduction behavior, but suffered from minor byproduct of ~ 15 − 12% methane generated from ethane dissociation. Ni/CeO2 catalysts, especially at 15% loading, demonstrated excellent balance between performance up to 80 − 52% conversion, CO2 utilization ~ 70 − 48%, with ~ 99% selectivity toward H2 and CO, and less than 1% formation of methane and ethylene byproducts. Increased Ni loading improved performance due to better reducibility and moderate surface acidity. These findings highlight CeO2 role in enhancing metal dispersion, particularly Ni/CeO2 catalyst offers a cost-effective alternative to noble metal of Rh/CeO2 for dry reforming of ethane, enabling efficient CO2 valorization for decarbonized energy systems.