Complementary effect of plasma-catalysis hybrid system on methane complete oxidation over non-PGM catalysts

Methane complete oxidation reaction was carried out in a non-thermal plasma (dielectric barrier discharge) quartz tube reactor where both plasma and catalyst were combined into one in-plasma catalysis system. In plasma only condition, the CO selectivity was maintained at high value (similar to 50%) until the temperature reached about 200 degrees C. In the presence of both plasma and catalyst, however, methane was oxidized even at room temperature mostly to CO2 with low CO selectivity over certain non-PGM catalyst like Co1Ni1Ox. Hence, methane complete oxidation reaction proceeded at much lower temperature similar to PM catalyst such as Pd/Al2O3, while maintaining low CO selectivity. (C) 2015 Elsevier B.V. All rights reserved.