The use of hydrogen to supply of combustion engines – part 2

The present study reviews the state-of-art regarding the application of H2 in the automotive industry. This part focuses on dual-fuel (DF) internal combustion engines (ICEs) supplied with fuel and H2. This is a continuation of the earlier part, which focused on out-of-engine studies on the effect of H2 combustion processes, ICEs supplied with H2, and vehicles powered by fuel cells (FCs). Using H2 in diesel engines via the DF strategy enables a decrease in diesel fuel consumption and a reduction in harmful exhaust emissions. Using H2 in diesel engines powered by diesel/biodiesel mixtures also allows for reducing reliance on fossil fuels. Also, incorporating nanomaterials or oxygen-containing compounds into diesel fuel formulations may enhance the combustion efficiency of H2-powered diesel engines, thereby increasing thermal efficiency and reducing fuel consumption. However, additional studies are required on this subject.