This paper describes an experimental and theoretical investigation of the selective catalytic reduction of NO by propene over two diesel oxidation catalysts. Both catalysts were commercial monolith samples of 400 CPSI with a PGM loading of 95 g/ft(3). In one monolith the catalyst was platinum only, and in the other a bimetallic catalyst of 4:1 by mass platinum and palladium. Both catalysts showed some activity for the SCR reaction, although relatively large amounts of N2O were also formed. Global kinetic models for the oxidation of propene, NO and the SCR reactions are developed. Several models from the literature were tested and compared. New models based on earlier work are proposed. A good agreement between experimental results and simulation was observed. (C) 2013 Elsevier B.V. All rights reserved.