Optimizing biodiesel blends with green hydrogen fuel: A study on combustion duration, fuel mass burnt, engine performance and emissions

Abstract

Although the combustion of petroleum-based fuels currently satisfies the majority of our energy needs, rapid industrialization has spurred the utilization of alternative energy sources to meet the growing demand for electricity. With the global population on the rise and increasing awareness of the dangers of climate change, there is a greater need to find sustainable and eco-friendly fuels. Utilizing biodiesel derived from non-edible sources is the most efficient and appealing option for meeting energy needs while mitigating environmental impacts. This paper focuses on the preparation and experimental analysis of biodiesel from Karanja oil. Various blends of Karanja biodiesel and regular diesel were produced and stirred to create KB10 (Diesel 90% + Karanja Biodiesel 10%) and KB20 (Diesel 80 % + Karanja Biodiesel 20%). Hydrogen was incorporated into the biodiesel to enhance fuel characteristics, delivered at a rate of 5 L per minute. The emissions and combustion results of the biodiesel blends were compared to those of pure diesel. At full load condition, KB10H5 reported the minimum combustion duration of 25.8°CA with mass fraction burnt of 17.8%. However, the biodiesel blend with 10% and 20% reported the reduced BTE. Highest brake power has been observed at 4.95 kW. The combination of Karanja biodiesel and hydrogen improves fuel quality and reduces the harmful gases emissions such as carbon monoxide and carbon dioxide. It is crucial to ensure that the operation is both efficient and comfortable, and this approach achieved both objectives. In addition, hydrogen energy can also be applied to the railway transportation industry, as a new direction for the green and low-carbon development of intercity transportation, driving the virtuous cycle and innovative development of the hydrogen energy-related industrial chain.