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<p>Designing catalyst particles with high catalytic activity and low pressure drop across the catalyst bed remains a critical challenge for the practical operation of dry reforming of methane (DRM) processes. In this study, the pore structure of spherical Ni/Al<sub>2</sub>O<sub>3</sub> catalyst particles was modified to reduce internal mass transfer limitations. The pore diameter and volume of the spherical alumina supports were successfully controlled by varying the HCl treatment duration. The modified pore structure resulting from HCl treatment significantly alleviated internal diffusion resistance, enhancing catalytic performance even under short residence times. Ni/Al_12h catalysts which showed the largest mesopore diameter and pore volume exhibit significantly enhanced catalytic performance in terms of CH<sub>4</sub> and CO<sub>2</sub> specific activity and H<sub>2</sub> specific production rate under high gas hourly space velocity (GHSV) (100,000&#xa0;h <sup>−1</sup>) condition, due to reduced internal mass transfer limitation. And it shows stable catalytic activity without any catalytic deactivation.</p>

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Porosity Control of Spherical Ni/Al2O3 Catalysts to Reduce Internal Diffusion Resistance for Enhanced Methane Dry Reforming Performance

  • 期刊论文

  • 发表日期：

    2025年8月12日

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  • Sung Beom Hwang,
  • Dong Seop Choi,
  • Eunju Yoo,
  • Eun Jin Heo,
  • Ji Bong Joo

摘要

Designing catalyst particles with high catalytic activity and low pressure drop across the catalyst bed remains a critical challenge for the practical operation of dry reforming of methane (DRM) processes. In this study, the pore structure of spherical Ni/Al2O3 catalyst particles was modified to reduce internal mass transfer limitations. The pore diameter and volume of the spherical alumina supports were successfully controlled by varying the HCl treatment duration. The modified pore structure resulting from HCl treatment significantly alleviated internal diffusion resistance, enhancing catalytic performance even under short residence times. Ni/Al_12h catalysts which showed the largest mesopore diameter and pore volume exhibit significantly enhanced catalytic performance in terms of CH4 and CO2 specific activity and H2 specific production rate under high gas hourly space velocity (GHSV) (100,000 h −1) condition, due to reduced internal mass transfer limitation. And it shows stable catalytic activity without any catalytic deactivation.