Performance and emission study of sustainable hybrid of Jatropha and waste cooking oil biodiesel-diesel blends on the CI engine

The Indian government has set indicative targets of reducing import dependency by 10% by 2022 and blending of 5% biodiesel in a diesel by 2030, utilizing biofuels produced from indigenous feedstocks in their Biofuel policy declared in 2018. The hybrid biodiesel from non-edible oil and waste oil has the potential to achieve 5% biodiesel blending in a diesel by 2030. Biodiesels produced from jatropha and waste cooking oils were blended in different volume ratios from 5 to 25% of each and blended with diesel. A total of 5 samp les of hybrid biodiesel blends were prep ared and their performance and emission study were carried out on a single-cylinder DI diesel engine. The average reduction in brake power for J5W5, J10W10, J15W15, J20W20, and J25W25 was 2.48, 5.47, 0.81, 3.2, and 2.54% respectively as compared to diesel owing to the lower calorific value of the hybrid biodiesel blends. The blend J10W10 gives the highest average BTE (25.25%) and the lowest average increase in BSFC (2.84%). Blend J25W25 shows a maximum 14% average increase in NOx emission and blend J15W15 gives maximum average reduction (18%) in smoke opacity emission. The performance of hybrid biodiesel in an unmodified diesel engine is comparable to diesel and has the potential to replace diesel fuel.