Effect of CO2, H2O and SO2 in the ceria-catalyzed combustion of soot under simulated diesel exhaust conditions

- CeZrNd oxide increases 3 times the soot combustion rate in NOx/O2/CO2/H2O/N2.
- CO2, H2O and SO2 adsorption on the catalysts competes with NOx adsorption.
- CO2, H2O and SO2 hinder the catalytic NO oxidation and catalytic soot combustion.
- The negative effect on soot combustion of SO2 (total inhibition) > H2O > CO2.