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http://dx.doi.org/10.7316/KHNES.2016.27.5.554

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

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)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.27, no.5, 2016 , pp. 554-561 More about this Journal
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.
Keywords
Bio-gas; Methane Reforming; $CO_2$ Dry Reforming; Synthesis Gas; $NiO/Al_2O_3$ catalyst; LFG;
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