Autoignition of sustainable fuels under dual operation with H2-carriers in a constant volume combustion chamber

The expected increase in the use of environmentally friendly liquid fuels medium and heavy-duty compression ignition engines (for both off-road transport applications), together with well-documented benefits hydrogen-carriers to decrease energy dependence achieve a neutral-carbon economy (internal combustion highly contributing global CO2 emissions), have motivated this work. autoignition characteristics different alternative diesel-type (hydrotreated vegetable oil, advanced biodiesel blends conventional diesel fuel polyoxymethylene dimethyl ether 1-butanol) under dual-fuel operation H2, NH3, CH4 were studied constant volume chamber at 535 600 °C. high reactivity was replaced by gaseous up 40 % energy. main delay time significantly affected not only type low fuel, ammonia considerably retarding autoignition, but also nature being less sensitive presence H2-carrier fuel. Results proved that higher (quantified through cetane number), lower influence on time.