PbCl2-poisoning kinetics of V2O5/TiO2 catalysts for the selective catalytic reduction of NO with NH3

Based on a model for the shell progressive poisoning of a single catalyst pellet in a catalytic reactor, PbCl2-poisoning kinetics of V2O5/TiO2 catalysts for the selective catalytic reduction of NO with NH3 was studied. The PbCl2-poisoning kinetic equation for the catalysts was established. Combining the activity retention fraction from the model simulation with that from the activity experiments, the relation between PbCl2 loadings over the catalysts with reaction time was established. The combined effect of PbCl2 concentration and PbCl2-poisoning reaction rate constant on activity retention fraction was simulated based on the established model. The results indicated that with increasing PbCl2 concentration and PbCl2-poisoning reaction rate constant, activity retention fraction decreased obviously with the increase of reaction time. (c) 2015 American Institute of Chemical Engineers Environ Prog, 34: 1085-1091, 2015