Combustion, performance and emission characteristics of various alcohol blends in a single cylinder diesel engine

The results showed that the ignition delay of the alcohol blends is longer than D100 due to the low cetane number of the alcohol fuels. Their peak cylinder pressures are higher compared to the diesel fuel for all engine loads. In addition, the maximum heat release rates of the alcohol blends are higher than diesel fuel due to the longer ignition delay and excessive oxygen content of alcohols. D100 has the lowest brake specific fuel consumption and the highest brake thermal efficiency compared to alcohol blends for all engine loads because of the higher heating value. B10, E10, and M10 follow D100 respectively in accordance with the heating values of the fuels. Also, alcohol addition causes a slight increase in nitrogen oxides (NOx) emissions while causing a reduction in smoke and carbon monoxide (CO) emissions.