Akademik Veri Yönetim Sistemi
JOURNAL OF THE ENERGY INSTITUTE, cilt.1, sa.1, ss.10-20, 2025 (SCI-Expanded)
This study examines the impact of methylamine-borane (MAB), a hydrogen-enriched
fuel additive, on the combustion dynamics, emission characteristics, and performance
metrics of gasoline engines. The evaluation was conducted at volumetric
concentrations of 5% (MAB5) and 10% (MAB10). The results indicated a substantial
reduction in carbon monoxide (CO) emissions by 76.79% for MAB5 and 66.39% for
MAB10, as well as a decrease in hydrocarbon (HC) emissions by 21.39% and 35.39%,
respectively. Carbon dioxide (CO₂) emissions were also reduced by 15.29% for MAB5
and 9.76% for MAB10, suggesting an improvement in combustion efficiency. However,
an increase in nitrogen oxides (NOx) emissions was observed, likely due to higher
peak combustion temperatures. Elevated oxygen (O₂) levels in the exhaust were
noted, reflecting alterations in in-cylinder oxygen dynamics and combustion
stoichiometry. Performance analysis revealed that MAB use resulted in higher brakespecific
fuel consumption (BSFC) and lower thermal efficiency, with reductions of
7.69% and 9.93% for MAB5 and MAB10, respectively, attributable to the lower energy
density of MAB relative to gasoline. A decrease in exhaust gas temperature was
observed, suggesting a complex interaction of energy release and heat transfer
processes. Despite the reduction in emissions, the increase in NOx formation
highlights the intensification of combustion phases and greater thermal stress within
the engine cylinder. The findings suggest that MAB, as a hydrogen-enriched fuel
additive, offers notable benefits in emission reduction, but presents challenges such as
reduced performance efficiency and increased thermal management requirements.
These results underscore the need for optimizing additive formulations and operational
parameters to balance the emission reduction potential with performance efficiency in
gasoline engine applications.