Akademik Veri Yönetim Sistemi
Biofuels, 2026 (SCI-Expanded, Scopus)
This study investigates the impact of hydrogen enrichment (3, 6, and 9 LPM) and cerium oxide (CeO2) nanoparticle doping (50 and 100 ppm) on the combustion, performance, and emission behavior of a compression ignition (CI) engine fueled with a 20% eucalyptus biodiesel–diesel blend (BD20). Experimental trials were conducted under variable engine load conditions to comprehensively evaluate ignition delay (ID), cylinder pressure, heat release rate (HRR), brake thermal efficiency (BTE), brake specific energy consumption (BSEC), and key exhaust emissions. Hydrogen induction significantly improved combustion characteristics, with peak pressure rising to 85 bar and HRR increasing by 63.7 J/°CA. The shortest ignition delay (10.0°CA) was achieved with BD20 + H2 (9 LPM) + Ce100 at full load, reflecting a 44% reduction compared to diesel. BTE improved by up to 14.5%, while BSEC decreased by 23.9% over BD20. Emission analysis showed notable reductions in CO (−24.0%), HC (−13.2%), and smoke (−11.3%) with increasing hydrogen and CeO2 concentrations. However, NOx emissions increased by 20.9%, attributed to elevated combustion temperatures from hydrogen’s high reactivity. The novelty of this work lies in its integrated investigation of eucalyptus biodiesel, hydrogen, and CeO2 nanoparticles in a dual-fuel mode, which has been sparsely addressed in earlier literature.