Performance of diesel particulate filter catalysts in the presence of biodiesel ash species

► Interaction of diesel particulate filter catalysts and biodiesel ash species. ► Catalytic conversion of soot in diesel particulate filters. ► Commercial catalyst (5:1 wt. ratio) decreased soot oxidation temperature. ► Biodiesel ash species (Na2CO3, K2CO3 or K3PO4) further decreased soot oxidation temperature. ► Engine oil ash species (CaSO4, Ca(H2PO4)2 and K2SO4) increased soot oxidation temperature.