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Catalysts 2019, 9(3), 292; https://doi.org/10.3390/catal9030292

CO2 Microwave Plasma—Catalytic Reactor for Efficient Reforming of Methane to Syngas

1
Plasma Technology Research Center, National Fusion Research Institute, 37 Dongjansan-ro, Gunsan, Jeollabuk-do 54004, Korea
2
Department of Applied Plasma Engineering, Electronic Engineering, Chonbuk National University, 567 Baekje-daero, Deojin-gu, Jeonju, Jeollabuk-do 54896, Korea
3
Department of Bio Nano System Engineering, Division of Mechanical Design Engineering, Chonbuk National University, 567 Baekje-daero, Deojin-gu, Jeonju, Jeollabuk-do 54896, Korea
*
Author to whom correspondence should be addressed.
Received: 22 January 2019 / Revised: 15 March 2019 / Accepted: 18 March 2019 / Published: 22 March 2019
(This article belongs to the Special Issue Catalytic Reforming of Methane)
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Abstract

CO2 was converted to synthesis gas in a microwave plasma–catalytic reactor by methane reforming at atmospheric pressure. The hybrid system used waste heat from the plasma to heat the catalyst. 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. As a result, the hybrid system was shown to be more efficient under catalyst-free conditions. 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. High CO2 and CH4 conversions of 87.9% and 92.9%, respectively, were achieved in the presence of catalyst at the same microwave power. 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. Additionally, the H2 energy yield were 270 g/h, and 91.2 g/kWh. 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. View Full-Text
Keywords: carbon dioxide; reforming; microwave plasma; catalyst; synthesis gas carbon dioxide; reforming; microwave plasma; catalyst; synthesis gas
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Chun, S.M.; Shin, D.H.; Ma, S.H.; Yang, G.W.; Hong, Y.C. CO2 Microwave Plasma—Catalytic Reactor for Efficient Reforming of Methane to Syngas. Catalysts 2019, 9, 292.

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