Catalytic Ignition of H2/O2 Mixtures on Platinum: Ignition Temperatures and Postignition Transients

We report experimental and theoretical studies of the transient behavior of the catalyst temperature during ignition of H 2 /O 2 mixtures on a platinum catalyst. The numerical simulations are based on a kinetic scheme of the reaction and a linear model of mass and heat transfer in the gas phase. We find a good agreement between experiment and theory. The influence of kinetic phase transitions on the ignition process is discussed.