Expectably, CO2 evolution is more prominent at the higher oxygen level in both crystallite sizes, where the yield reaches a maximum of approximately 8 % at 350 °C in the smaller crystallite size sample and approximately 2 % in the larger crystallite size sample at 400 °C in the first cycle. The acetone yield is higher at the higher O2 level in the small crystallite size sample (47 % at higher and 39 % at lower O2 level) in the first cycle, but lower in the large crystallite size sample (34 % and 26 % at higher and 40 % and 32 % at lower O2 level in the first and second cycle, respectively) in both cycles. This trend is found in H2 evolution as well and suggests, that the leading H2-evolving processes are partial oxidation in the smaller crystallite size sample and non-oxidative dehydrogenation in the larger crystallite size sample.