Experimental investigations of diesel engine emissions and combustion behaviour using addition of antioxidant additives to jamun biodiesel blend

Depletion of fossil fuel, ever increasing demand for the fuel and serious environmental issues leads us to go for alternate fuel to CI engines. The objective of the present work is to explore the possibility of renewable fuels which can perform better than that of diesel fuel in terms of performance, combustion and emission characteristics. Kirloskar make single cylinder, four stroke, water cooled and naturally aspirated, direct injection compression ignition engine is used for the investigation. The engine develops 5.7 hp at rated speed of 1500 rpm. The work aims at to conduct a test in diesel engine to decrease the oxides of nitrogen (NOx) in 20% proportion of jamun biodiesel and 80% proportion of diesel (JA20) using antioxidant additives such as p-phenylenediamine (PPDA), A-tocopherol acetate (AT) and L-ascorbic acid (LA). The inclusion of PPDA, AT and LA into JA20 is very small percentage and shows no variation in properties of blend. From the test results, the PPDA, AT and LA with JA20 are effective in controlling the NOx. Further, 250 mg of PPDA with JA20 decreases the NOx upto 25.4% and also decrease in hydrocarbon (HC), carbon monoxide (CO) and smoke were achieved than JA20 blend without antioxidant additive.

Automated summary

The study aims to test a blend of jamun biodiesel and diesel with 20% and 80% proportions respectively in a diesel engine, along with antioxidant additives like p-phenylenediamine, vitamin E, and vitamin C, to reduce nitrogen oxide emissions. The addition of these antioxidants has been found to effectively control NOx emissions, with a significant decrease achieved using 250 mg of p-phenylenediamine in the blend.