Impact of Fuel Hydrogenation and Fuel Additives on Dual Biodiesel Mixture for Improving Combustion and Emission Characteristics in Compression Ignition Engine

In this study, the Palm and Juliflora biodiesel (PJ100) mixture is prepared in the proportion of (50% palm biodiesel by volume and 50% juliflora biodiesel by volume). The different fuel samples were prepared with PJ100 and diesel. 20% of PJ100 + 80% of diesel (B20), Partial hydrogenation of PJ100 was carried out and prepared 20% of hydrogenated PJ100+80% of diesel (HB20) and 2000 ppm of DTBP (Di-tert-butyl peroxide) additive was added with B20 (B20 + DTBP). The above fuel samples examined a single-cylinder diesel engine’s combustion and emission characteristics. An autoclave reactor was used for the hydrogenation of PJ biodiesel, and gas chromatography was used to evaluate the fatty acid composition of biodiesel. Tamson FBT equipment was used to verify the filterability characteristics of all the biodiesel blends and diesel. The FBT results show that B20 and HB20 are 1.36 and 1.4, respectively, which aligns with the ASTM standard (D2068-14). Ignition delay and combustion duration of HB20 and B20+DTBP are significantly improved than the B20 blend. The Brake thermal efficiency of HB20 is 7.7% higher than B20. Similarly, NOx emission was reduced in HB20, and B20+DTBP fuels were 8.66% and 9.74%, respectively, compared to the B20 blend. Based on the above findings, a partial hydrogenation (HB20) blend has been a better way to improve the trade-off qualities than adding DTBP with B20.