EFFECT OF CO2 ON THE PERFORMANCE OF AU MNOX AND PT/SNOX LOW-TEMPERATURE CO OXIDATION CATALYSTS/

The performance of Au/MnOx and Pt/SnOx catalysts for low-temperature ( <100 degrees C) CO oxidation under stoichiometric conditions has been examined for the case where 8% or 16% CO2 is added to the feed gas. Hi gh concentrations of CO2 in the reaction gas mixture adversely affect the behavior of these catalysts due to CO2 retention at their surfaces . The magnitude of this detrimental effect can be reduced by adding an Fe promotor to both types of catalysts and optimizing various prepara tive and pretreatment variables.