Combined effect of hydrogen and with Julifora biodiesel blend (JFB20) on the combustion, performance and emission characteristics of a direct-injection diesel engine

Abstract

The effect of hydrogen (H2) gas share to the Julifora biodiesel blended fuel (JFB20) on the performance, combustion, and emission parameters of a CI engine was performed in this paper. Julifora biodiesel was prepared using 2-stage transesterification process and their properties were evaluated according to ASTM methods. Engine tests were carried out on a single cylinder diesel engine using hydrogen (4 lpm and 8 lpm) and JFB20 fuel samples and their results were compared with diesel. The hydrogen (H2) gas was introduced into the inlet manifold of a diesel engine at a volume flow rates of 4 lpm and 8 lpm, respectively. From the experimental results, BTE for the H2 (hydrogen) mixed with JFB20 fuel was improved by 18.4%, and BSFC was reduced by 13.6%. The induction of H2 gas along with JFB20 fuel increased the heat release rate (HRR) and cylinder pressure (CP) compared to the JFB20 fuel. The Properties of MFB, Exhaust gas temperature and ignition delay for all fuel samples were also determined. Although the NOx emissions were significantly improved, the tailpipe emissions such as HC, CO and smoke opacity were decreased. It is concluded that hydrogen gas along with biodiesel are viable alternative fuels for diesel engines. A qualitative study was performed to establish the Engine performance, combustion and emission magnitude fuelled with combination of Hydrogen and with Julifora biodiesel blend (JFB20).