John coblyn oregon3/28/2023 There are continued efforts to develop and optimize different technologies for capture and sequestration of these greenhouse gases from industrial emission sites. The direct capture of CO2 and CH4 from the atmosphere to stabilize the concentrations in the air to control global warming is accelerating. Considering the current status of CH4–CO2 reforming by plasma, there is an opportunity to improve the energy conversion efficiency and the treatment capacity of the process by optimizing both plasma form and reactor design in future work. To obtain the aim, three key factors, electron density, plasma temperature and reactor configuration related to the process are emphasized. In particular, the attention is focused on how to achieve higher conversions at high feed-gas flow rate, so as to lessen the energy consumption in the process by plasma to meet the requirements of industrial application. The evaluations for their performances and the key factors in different plasmas are given. This paper presents an overview of CH4–CO2 reforming by cold plasmas and thermal plasma. Plasma technology is considered to be one of potential ways for CH4–CO2 reforming. Thus, the developed hybrid system is well suited for efficient and economically viable CO2 reduction and synthesis gas production, paving the way for next-generation CO2 utilization and zero-emission industrial processes.ĬH4–CO2 reforming is of rapid growing interest for reasons of the continuous decrease of petroleum resources and the emphasis on the environmental situation for greenhouse gas mitigation. Additionally, the H2 energy yield were 270 g/h, and 91.2 g/kWh. At constant microwave power, catalyst addition increased the H2 and CO mass yield rates to 0.27 kg/h and 2.012 kg/h, respectively. High CO2 and CH4 conversions of 87.9% and 92.9%, respectively, were achieved in the presence of catalyst at the same microwave power. The use of microwave plasma alone resulted in low conversions of CO2 and CH4, which were 32.9% and 42.7%, respectively, at 3 kW microwave power. As a result, the hybrid system was shown to be more efficient under catalyst-free conditions. Conversion degrees were examined as a function of gas temperature, and the reforming efficiency of the plasma-only system was compared with that of the hybrid system. The hybrid system used waste heat from the plasma to heat the catalyst. CO2 was converted to synthesis gas in a microwave plasma–catalytic reactor by methane reforming at atmospheric pressure.
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