Pt + Cu-loaded ZrPILC tested in the reactions of No, selective catalytic reduction by propylene and decane in realistic feeds with a high content of water, oxygen and an admixture of SO2 demonstrated promising performance at high space velocities (up to 100 000 h(-1)) in the temperature range of 150-400 degrees C. A strong promoting effect of water, oxygen and the catalyst presulfation on the degree of NOx conversion into N-2 was revealed. The specificity of these catalyst action in realistic feeds was explained by taking into account the textural, structural and surface features of zirconia-pillared clays as well as the mechanism of NO, HC SCR reaction including participation of strongly bound species in key stages. (c) 2006 Elsevier B.V. All rights reserved.