The reaction of propane with mixtures of NO, N2Oand O2 over platinum, palladium and rhodium catalysts

The reactions of propane with O 2 , N 2 0 and NO over Pt, Pd and Rh catalysts have been investigated under near-stoichiometric conditions. In general, Pt is the most active catalyst for propane oxidation, followed by Pd and Rh. In individual tests, the reactivity of the oxidants varies widely, the order being O 2 >> N 2 0 > NO for Pt, O 2 ≈ N 2 O >> NO for Rh, and N 2 O>> NO or O 2 for Pd, where the reaction involving O 2 is dependent on pretreatment and history. Interactions between oxidants alter the behaviour when all three are present. The order of reactivity changes to O 2 > NO > N 2 O for Pt, O 2 > N 2 O > NO for Rh, and O 2 > NO > N 2 O for Pd. The findings imply substantial competition between oxidants, especially with Pt and Pd.