Oxidation of methane over yttria/zirconia mixed oxide shows two parallel oxidation pathways, i.e. partial oxidation to CO+H2+H2O and full oxidation to CO2+2H2O. Both reactions proceed via a Mars van Krevelen mechanism with first order kinetics for methane and oxygen and are retarded by water. A mechanism is suggested in which methane is homolitically dissociated over O−(s) sites and via the formation and decomposition of a formaldehyde precursor reacted to CO, H2 and H2O. In parallel, CO2 is obtained from decomposition of bicarbonate that is formed via further oxidation of dioxymethylene.
- Methane partial oxidation
- Methane pulse
Steghuis, A. G., Steghuis, A. G., van Ommen, J. G., & Lercher, J. A. (1998). on the reaction mechanism for methane partial oxidation over yttria/zirconia. Catalysis today, 46(46), 91-97. https://doi.org/10.1016/S0920-5861(98)00330-7