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 Reaction Optimization for the Utilization of CO2 and CH4 from Bio-gas

바이오가스에서 CO2/CH4 활용에 관한 반응최적화 연구

  • KHO, DONGHYUN (Department of Environmental and Energy Engineering, the University of Suwon) ;
  • CHO, WOOKSANG (Department of Environmental and Energy Engineering, the University of Suwon) ;
  • BAEK, YOUNGSOON (Department of Environmental and Energy Engineering, the University of Suwon)
  • 고동현 (수원대학교 환경에너지공학과) ;
  • 조욱상 (수원대학교 환경에너지공학과) ;
  • 백영순 (수원대학교 환경에너지공학과)
  • Received : 2016.09.26
  • Accepted : 2016.10.30
  • Published : 2016.10.30
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Abstract

Depending on the Bio-gas sources, main component gases of $CH_4$ and $CO_2$ are shown to be variously present in amounts. For the anaerobic digester, The concentration of $CH_4$ and $CO_2$ in the gases are 60~70 and 30~35 vol%. For the landfill gas, $CH_4$ and $CO_2$ are 40~60 and 40~60 vol%. For the food wastes, $CH_4$ and $CO_2$ are 60~80 and 20~40 vol%, respectively. In this study, maximum conversion rates of $CO_2$ were obtained from the variety of concentrations of $CH_4$ and $CO_2$ by the catalysts of reforming reactions. Moreover, in order to get maximum producing amount of synthetic gas, experimental studies were performed to optimize the reaction variables. On the basis of $CH_4$, 243 ml, R [$CH_4/(O2+CO_2)$] value were varied from 0.8 to 1.35, in the study of $CH_4$ and $CO_2$ reforming reactions. It was shown that the optimal results were obtained for 1.35 of R value. And also, at $850^{\circ}C$ and 1 atm, the production rate of synthetic gas was 90% and the conversion rates of $CH_4$ and $CO_2$ were higher than 99% and 90%, respectively.

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References

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