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In the present work, the partial oxidation of diesel (US07), rapeseed methyl ester (RME) and low temperature Fischer - Tropsch synthetic diesel (SD), almost 100% paraffinic, was investigated for the purpose of hydrogen and intermediate hydrocarbon species production over a prototype reforming catalyst, for the potential use in hydrocarbon selective catalytic reduction (HC-SCR) of nitrogen oxide (NOx) emissions from diesel engines. The presence of small amounts of hydrogen can substantially improve the effectiveness of hydrocarbons in the selective reduction of NOx over lean NOx catalysts, particularly at low temperatures (150-350°C). In this study, the partial oxidation reactor was operating at the same input power (kW), based on the calorific values of the fed fuel. Hydrogen production was as high as 19%, from the partial oxidation of SD fuel, and dropped to 17% and 14% for RME and US07 diesel, respectively.