Experimental investigation on the combustion, performance and pollutant emissions of biodiesel from animal fat residues on a direct injection diesel engine

A decrease of 9% of power output at 1500 rpm was also detected. As per pollutant emissions, a drastic reduction of unburned hydrocarbons between 32% and 45% was obtained with AFRBD (animal fat residue biodiesel). Particulate matter emissions were also reduced at low and medium load ranges, but no differences were detected at high loads. Nitric oxides emissions were also measured and slight increase was detected at low loads and a slight reduction was noticed at full engine load.