Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine
Artículo de revista
2022-04-05
Lubricants
Suiza
: Hydrogen is considered one of the main gaseous fuels due to its ability to improve thermal
performance in diesel engines. However, its influence on the characteristics of lubricating oil is
generally ignored. Thus, in the present investigation, an analysis of the effect on the physical and
chemical properties of lubricating oil with mixtures of diesel fuel–hydrogen was carried out, and the
environmental impacts of this type of mixture were assessed. The development of the research was
carried out using a diesel engine under four torque conditions (80 Nm, 120 Nm, 160 Nm and 200 Nm)
and three hydrogen gas flow conditions (0.75 lpm, 1.00 lpm and 1.25 lpm). From the results, it was
possible to demonstrate that the presence of hydrogen caused decreases of 3.50%, 6.79% and 4.42% in
the emissions of CO, HC, and smoke opacity, respectively. However, hydrogen further decreased
the viscosity of the lubricating oil by 26%. Additionally, hydrogen gas produced increases of 17.7%,
29.27%, 21.95% and 27.41% in metallic components, such as Fe, Cu, Al and Cr, respectively. In general,
hydrogen favors the contamination and oxidation of lubricating oil, which implies a greater wear
of the engine components. Due to the significantly negative impact of hydrogen on the lubrication
system, it should be considered due to its influence on the economic and environmental cost during
the engine’s life cycle.
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