Abstract
Abstract >> LFG (Land-Fill Gas) includes components of CH 4 , CO 2 , O 2 , N 2 , and water. The preparation of synthesisgas from LFG as a DME (Dimethyl Ether) feedstock was studied by methane reforming of CO 2 , O 2 and steamover NiO-MgO-CeO 2 /Al 2 O 3 catalyst. Our experiments were performed to investigate the effects of methane conversionand syngas ratio on the amount of LFG components over NiO-MgO-CeO 2 /Al 2 O 3 catalyst. Results were obtainedthrough the activity reaction experiments at the temperature of 900°C and GHSV of 4,000. The results were asfollowing; it has generally shown that methane conversion rate increased with the increase of oxygen and carbon dioxide amounts. Highly methane conversion of 92~93% and syngas ratio of approximately 1.0 were obtainedin the feed of gas composition flow-rate of 243ml/min of CH 4 , 241ml/min of CO 2 , 195ml/min of O 2 , 48ml/minof N 2 , and 360ml/min of water, respectively, under reactor pressure of 15 bar for 50 hrs of reaction time. Also, it was shown that catalyst deactivation by coke formation was reduced by excessively adding oxygen and steamas an oxidizer of the methane reforming.
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