Scholarlink

<p>Hydrogen energy is a zero-carbon, versatile clean energy source that serves as an ideal storage medium for renewable energy peak shaving and is the optimal choice for achieving large-scale, deep decarbonization in transportation, power, industry, and buildings. This paper addresses the key technical challenges in the catalytic conversion of ortho and para hydrocarbons during liquid hydrogen production. It systematically compares the catalytic performance, flow characteristics, and heat transfer efficiency of packed-bed and wall-mounted catalysts. Through a combination of experimental research and numerical simulation, it was found that wall-mounted catalysts significantly outperform traditional packed catalysts in terms of low pressure drop (pressure drop is only one-third of that of packed catalysts at flow rates of 5–10&#xa0;m/s) and high hydrogen gas processing capacity (allowing for higher flow rates). The study also revealed the influence of the length-to-diameter ratio of the conversion column on catalytic performance: When the length-to-diameter ratio is between 1.5 and 5, the average conversion rate of para hydrogen increases by 4%, and the outlet temperature decreases by 37.6%. This study provides new insights for the efficient production of liquid hydrogen and lays the theoretical foundation for the large-scale application of wall-mounted catalysts in the field of cryogenic chemical engineering.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of Flow and Heat Transfer Characteristics Coupled with Ortho–Para Hydrogen Conversion in a Wall-Coated Catalyst Microchannel Reactor

  • 期刊论文

  • 发表日期：

    2025年11月3日

查看全文
  • Cheng Yan,
  • Jianlu Zhu,
  • Qi Lu,
  • Jiali Wang,
  • Wenqing Song

摘要

Hydrogen energy is a zero-carbon, versatile clean energy source that serves as an ideal storage medium for renewable energy peak shaving and is the optimal choice for achieving large-scale, deep decarbonization in transportation, power, industry, and buildings. This paper addresses the key technical challenges in the catalytic conversion of ortho and para hydrocarbons during liquid hydrogen production. It systematically compares the catalytic performance, flow characteristics, and heat transfer efficiency of packed-bed and wall-mounted catalysts. Through a combination of experimental research and numerical simulation, it was found that wall-mounted catalysts significantly outperform traditional packed catalysts in terms of low pressure drop (pressure drop is only one-third of that of packed catalysts at flow rates of 5–10 m/s) and high hydrogen gas processing capacity (allowing for higher flow rates). The study also revealed the influence of the length-to-diameter ratio of the conversion column on catalytic performance: When the length-to-diameter ratio is between 1.5 and 5, the average conversion rate of para hydrogen increases by 4%, and the outlet temperature decreases by 37.6%. This study provides new insights for the efficient production of liquid hydrogen and lays the theoretical foundation for the large-scale application of wall-mounted catalysts in the field of cryogenic chemical engineering.