As population activity increases, the amount of biogas generated increases as the amount of organic waste generated increases. In recent years, organic wastes have been treated by landfilling, feed conversion, composting, incineration, etc. Recently, efforts have been made to utilize energy from organic wastes by generating large amounts of methane, and methane generated from organic wastes can be supplied stably, the organic matter is abundant, and the difference in quality is not great. In particular, CH₄ and CO₂ generated from sewage sludge and livestock manure treatment are 60 ~ 70% and 30 ~ 35%, and CH₄ and CO₂ generated from food wastes are 60 ~ 80% and 20 ~ 40% And In case of landfill gas, CH₄ and CO₂ have a composition of 40 ~ 60% and 40 ~ 60%. The biogas are mainly used by directly burning, using heat, applying to electric power or automobile, or connecting natural gas (NG) with piping to supply city gas. Therefore, not only is biogas used in localized utilization areas, but also in the case of electric power, there are problems such as installation of facilities necessary for transportation to the consumer. Therefore, in order to use the regenerated energy from the biogas more widely, it is necessary to convert the biogas to methanol, LNG or DME, which is a liquid fuel which is convenient to store and transport, or a synthesis gas manufacturing technology is desperately needed.
In this study, experiments were conducted to produce hydrogen and carbon monoxide through various biogas reactions on Ni/Ce-ZrO₂/Al₂O3 catalysts. Synthetic gas production experiments were carried out on a wide range of concentrations of methane and carbon dioxide, the major constituents of biogas from various organic wastes. In particular, the effect of (O₂ + CO₂)/CH₄ (= R'') on the yields of hydrogen and carbon monoxide was experimentally investigated. The effect of methane, carbon dioxide and oxygen on the reaction was investigated. In addition, the experiment was carried out continuously for 200 hours under the condition of the best conversion of carbon dioxide and methane. Also simulation for syngas synthesis from the CO₂ reforming of CH₄ were computed by employing total Gibbs free energy minimization method using PRO/II simulator, and compared with the experiment value.