| 초록 |
Natural gas is popular energy source globally, especially for transportation. However, emission of unburnt methane is observed from the natural gas vehicles and regulation of methane emission is necessary for the environmental protection. Catalytic combustion of methane is an effective method for reducing methane emission and Pd catalyst is known as the best catalyst for the reaction. However, it is limited in commercial usage because of high price. Among non-noble metal oxide catalysts, cobalt oxide is very active catalyst for the reaction. However, poor structural and textural properties limit its application for the methane combustion reaction. In this work, mesoporous cobalt oxide was synthesized to improve mass transfer efficiency. Also, mesoporous cobalt oxide catalyst was treated by nitric acid to modify surface chemistry. The prepared catalysts were applied to the methane combustion reaction and the effect of acid treatment was investigated by various characterization tools. |
