Reduction of NO by C3H6 over CuO–MnO/MgF2 in the presence of H2O

The effect of the presence of steam on the catalytic activity of MgF2 supported binary copper and manganese oxides in the reaction of NO+C3H6+O2 has been investigated in comparison to that on the activity of single metal systems such as Cu–O/MgF2 and Mn–O/MgF2. The reaction was performed for different compositions of the reaction mixture, i.e. under reducing, stoichiometric and oxidising conditions. The most resistant to steam proved to be the mixed Cu–Mn–O/MgF2 system, with a high conversion of NO to N2. When the inflow of steam was stopped, the catalyst underwent regeneration.