Chromium has been identified as a carcinogenic metal. Incineration is the u
seful method for disposal of toxic chromium hazard waste and a chromium kin
etic model in a flame is very important to study chromium oxidation. Chromi
um chemical kinetics over a range of temperatures of a hydrogen/air flame i
s proposed. Nine chromium compounds and fifty-eight reversible chemical rea
ctions were considered. The forward reaction rates are calculated based on
the molecular collision approach and Arrhenius's Law. The backward reaction
rates were calculated according to forward reaction rates, the equilibrium
constants and chemical thermodynamics. The kinetic model is verified for t
wo premixed equilibrium cases and is tested for a hydrogen/air diffusion fl
ame. A chemical flux analysis is employed to reveal the significant chemica
l reactions. The results show that the kinetic model is precise enough and
the chromium kinetics play an important role in the Hydrogen/Air diffusion
flame.