Investigating the Combustion Performance and Emission of Biodiesel Pollutants Produced from Three New Non-Edible Oils in a Diesel Engine

The emissions of three new species of biodiesel (Common sage, Rosmarinus officinalis and Mentha oil) and their combustion performance in a diesel engine were investigated. The results show that by increasing the ratio of biodiesel mixed with diesel fuel, the amount of torque decreases with increasing engine speed, and the closest results to diesel fuel are related to common sage biodiesel. common sage biodiesel showed that the power produced is 1 to 2% higher than other biodiesels. The highest specific brake fuel consumption was observed in mint biodiesel. The outgoing gas temperature for common sage is between 1 and 3% lower than the other two types of biodiesel. All biodiesels reduced nitrogen oxides, carbon monoxide, and sulfur dioxide. The highest rate of reduction in soot turbidity was 85%, in the case of common sage biodiesel.