Akademik Veri Yönetim Sistemi
International Journal of Hydrogen Energy, cilt.145, ss.1056-1070, 2025 (SCI-Expanded, Scopus)
Environmental degradation has driven researchers to investigate zero-carbon and low-carbon fuels. Methylcyclohexane (MCH), a low-carbon and hydrogen-rich liquid fuel, is crucial for exploiting hydrogen in existing internal combustion engines. While MCH has been extensively studied for its hydrogen storage capacity and chemical properties, its direct application in internal combustion engines remains largely unexplored. In this study, MCH was directly mixed with the diesel-biodiesel blend at 5 %, 10 %, and 15 % volumetric ratios to examine the impacts of MCH on the thermophysical properties of fuel mixtures, engine combustion, performance, and pollutant emissions. In addition, the environmental impact rate, environmental degradation cost, and environmental-social cost of exhaust gases emitted from the engine were calculated for each fuel case and compared with those of regular diesel (RD) and diesel-biodiesel blend (B20). The fuel analysis results showed that MCH improved the thermophysical fuel properties of the diesel-biodiesel blend. The enhanced fuel characteristics allowed for better fuel-air mixture formation and combustion in the engine cylinder. Subsequently, MCH offered a 2.56 % increase in thermal efficiency, a 4.88 % improvement in specific fuel consumption, and a reduction in CO, NOx, and smoke opacity by 14.00 %, 4.76 %, and 33.78 % compared to B20. MCH-included fuels outperformed the RD in terms of environmental impact rate, environmental degradation cost, and environmental-social cost of exhaust gases. The findings support MCH's viability as a hydrogen-rich fuel, providing a practical pathway toward efficient combustion and reducing environmental impact in existing engine technologies.