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<p>We report the use of microwave plasma for the production of hydrogen-enriched gas by converting a mixture of CO₂ and CH₄. A novel type of compact and simple in design, waveguide-based, atmospheric pressure plasma source is used. It doesn’t contain a discharge tube, but involve a swirling gas flow and operates without a catalyst. The influence of the input parameters on the conversion process parameters is investigated. It is found that the power of microwaves benefits the concentration of H<sub>2</sub>, but the gas flow rate is found to be detrimental to the H<sub>2</sub> concentration. It is observed that the CO<sub>2</sub>/CH<sub>4</sub> flow rate ratio is another factor influencing the process parameters. The best results obtained of H<sub>2</sub> concentration and conversion rate of CH<sub>4</sub> are 33% and 46%, respectively, while in the terms of H<sub>2</sub> production rate and the energy yield of H<sub>2</sub> production are 118&#xa0;g/h and 30&#xa0;g/kWh, respectively.</p>

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Hydrogen fuel production from CO2/CH4 mixture using a novel type of an atmospheric pressure microwave (2.45 GHz) plasma source

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月27日

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  • Dariusz Czylkowski,
  • Bartosz Hrycak,
  • Robert Miotk,
  • Mirosław Dors,
  • Mariusz Jasiński

摘要

We report the use of microwave plasma for the production of hydrogen-enriched gas by converting a mixture of CO₂ and CH₄. A novel type of compact and simple in design, waveguide-based, atmospheric pressure plasma source is used. It doesn’t contain a discharge tube, but involve a swirling gas flow and operates without a catalyst. The influence of the input parameters on the conversion process parameters is investigated. It is found that the power of microwaves benefits the concentration of H2, but the gas flow rate is found to be detrimental to the H2 concentration. It is observed that the CO2/CH4 flow rate ratio is another factor influencing the process parameters. The best results obtained of H2 concentration and conversion rate of CH4 are 33% and 46%, respectively, while in the terms of H2 production rate and the energy yield of H2 production are 118 g/h and 30 g/kWh, respectively.