Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Synthesis of CH4 from CO2 of Biogas Using 40 wt% Ni-Mg Catalyst: Characteristic Comparison of Commercial Catalyst and 40 wt% Ni Catalyt

40 wt% Ni 촉매에서 바이오가스 중 CO2로부터 메탄제조에 관한 연구: Commercial Catalyst와의 특성 비교분석

  • HAN, DANBEE (Department of Environment-Energy Engineering, The University of Suwon) ;
  • BAEK, YOUNGSOON (Department of Environment-Energy Engineering, The University of Suwon)
  • 한단비 (수원대학교 환경에너지공학과) ;
  • 백영순 (수원대학교 환경에너지공학과)
  • Received : 2021.10.13
  • Accepted : 2021.10.20
  • Published : 2021.10.30
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Abstract

Power to gas (P2G) is one of the energy storage technologies that can increase the storage period and storage capacity compared to the existing battery type. One of P2G technology produces hydrogen by decomposing water from renewable energy (electricity) and the other produces CH4 by reacting hydrogen with CO2. This study is an experimental study to produce CH4 by reacting CO2 of biogas with hydrogen using a 40 wt% Ni-Mg-Al catalyst and a commercial catalyst. Catalyst characteristics were analyzed through H2-TPR, XRD, and XPS instruments of 40% Ni catalyst and commercial catalyst. The effect on the CO2 conversion rate and CH4 selectivity was analyzed, and the activities of a 40% Ni catalyst and a commercial catalyst were compared. As a result of experiment, In the case of a 40 wt% catalyst, the maximum CO2 conversion rate showed 77% at the reaction temperature of 400℃. Meanwhile, the commercial catalyst showed a maximum CO2 conversion rate of 60% at 450℃. When 50% of CO was added to the CO2 methanation reaction, the CO2 conversion rate was increased by about 5%. This is considered to be due to the atmosphere in which the CO reaction can occur without the process of converting to CH4 after forming carbon and CO as intermediates in terms of the CO2 mechanism on the catalyst surface.

Keywords

Acknowledgement

This study was conducted with the support of the Korea institute of energy technology evaluation and planning (KETEP) and the Korean government (ministry of trade, industry and energy, 2021) (funding source No. 20213030040270, development and demonstration of hydrogen production process based on waste plastic non-oxidative pyrolysis). This study was conducted with the support of the basic science research capacity enhancement project through the Korea basic science institute (national research facilities and equipment center) grant funded by the ministry of education (2019R1A6C1010013).

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