As concern about global warming and dependences on fossil fuel grows, there is an increasing interest to shift fromtraditional fuel to renewable energy sources. Blends of Fischer-Tropsch (F-T) fuels, biodiesel and ethanol seem to be apromising fuel for compression ignition (CI) engine application. The aim of this work is to study and model the impact ofthese fuels on combustion and pollutant emissions.In the present study, mixtures of 4 species are proposed to represent the oxidation of F-T/biodiesel/ethanol blends: ndecane,iso-octane, methyl octanoate and ethanol. The kinetic of oxidation of n-decane/iso-octane/methyloctanoate/ethanol blends was studied experimentally in a jet stirred reactor at 10 atm and a constant residence time of 1 s,over the temperature range of 560-1160 K and for three equivalence ratio (0.5, 1 and 2). A kinetic reaction mechanismwas developed and used to simulate the oxidation of n-decane/iso-octane/methyl octanoate/ethanol mixtures. Theproposed kinetic reaction mechanism yields a good representation of the kinetic of oxidation of the tested biofuel blends.The kinetic analyses allowed identifying the most influencing reactions for the oxidation rate of the fuels.Finally, four F-T/biodiesel/ethanol blends have been tested on a single cylinder, direct injection, four-stroke Dieselengine. This study, including an analysis of unregulated emissions allowed observing the influence of fuel formulationon combustion and on pollutant emissions. These main engine results tendencies have been compared to the results of thekinetic model.
