A screening study on the activation energy of vanadate-based catalysts fordiesel soot combustion

The activation energy of carbon combustion catalysed by alkali vanadates or alkali vanadates/chlorides mixtures is assessed by the Ozawa method. The m ost active catalyst, Cs4V2O7, entails more than 50% decrease of the activat ion energy compared to non-catalytic combustion (from 157 down to 75 kJ/mol ). The catalyst performance is enhanced when the catalyst is dissolved in a eutectic liquid (e.g., AgCl + CsCl), which likely improves the catalyst/ca rbon contact conditions.