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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 2 , but the gas flow rate is found to be detrimental to the H 2 concentration. It is observed that the CO 2 /CH 4 flow rate ratio is another factor influencing the process parameters. The best results obtained of H 2 concentration and conversion rate of CH 4 are 33% and 46%, respectively, while in the terms of H 2 production rate and the energy yield of H 2 production are 118 g/h and 30 g/kWh, respectively.
Czylkowski et al. (Mon,) studied this question.