Following the activation step of the catalyst test, the temperature is brought to 225 ºC in lean air and gradually increased, in steps of 25 ºC, in the reaction feed up to 450 ºC, to enable the conversion of propane and oxygen. If the propane and/or the oxygen (molar) conversion exceeds 85%, the increase in temperature is stopped to prevent catalyst decomposition. At each of the temperatures, the steady-state operation is reached and the reaction mixture at the reactor outlet is collected and analyzed, providing the measures of catalytic performance.