The addition of water vapour increases the onset temperatures of both acetone and hydrogen evolution in both crystallite sizes compared to the oxidative dehydrogenation experiments. The addition of oxygen increases both acetone and hydrogen evolution, but increasing oxygen levels do not influence the absolute level of neither acetone evolution nor hydrogen evolution in the larger crystallite size sample. In the smaller crystallite size sample, acetone evolution is facilitated at oxygen levels of 1.0 vol% and 1.4 vol% at lower temperatures, but slightly impaired at higher temperatures in comparison to the oxygen level of 0.5 vol%. Partially, differences in absolute acetone and hydrogen evolution between experiments without and with oxygen co-dosing are related to differences in the starting concentration of 2-propanol (1.1 vol% 2-propanol without oxygen co-dosing and 1.5 vol% with oxygen co-dosing). For this Hydrogen evolution in the smaller crystallite size sample is considerably lower at the two highest oxygen levels than at lower ones. Carbon dioxide evolution plays a role in the small crystallite size only and is proportional to the oxygen concentration.