Experimental investigations on the performance and emission characteristics of hydrogen enriched Bio-CNG in a common rail direct injection dual fuel diesel engine

• Published in: International journal of hydrogen energy Vol. 88; pp. 579 - 593
• Main Authors: Singh, Manish Kumar, Chaudhary, Vinay Prakash, Lata, D.B.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 28-10-2024
• Subjects: Alternative fuel; CRDI diesel engine; Dual-fuel diesel engine; Hydrogen; Hydrogen-enriched BCNG; Alternative fuel; Dual-fuel diesel engine; Hydrogen; Hydrogen-enriched BCNG; CRDI diesel engine
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2024.09.236

The current energy and environmental problems demand the replacement of fossil fuels with renewable fuels. Research shows that hydrogen-enriched CNG fuels enhance the thermal efficiency of diesel engines while reducing gaseous emissions. This experimental work investigates the performance and emissions parameters of a diesel engine in dual fuel mode with hydrogen-enriched Bio-CNG (HBCNG). It is performed on a single-cylinder, four-stroke common rail direct injection (CRDI) diesel engine at 1500 rpm and 3.5 kW. The outcomes of this experiment are compared to a neat diesel operation. It is observed that at low load with 30% gaseous fuel substitution (GFS), brake thermal efficiency decreases by 13.70% and 15.53% for hydrogen and BCNG-enriched diesel, respectively. Similarly, at medium load, with the gaseous mixture of 40% H2 and 60% BCNG co-combusted with 60% diesel, the BTE improves by 15.83%. At high load, 40% gaseous fuel mixture (40% H2 + 60% BCNG) combustion with diesel results in 21.25% enhanced BTE. Moreover, at the same load condition and GFS, emissions of HC increase by 41.59%, CO decreases by 30%, CO2 decreases by 55.36%, and NOx decreases by 25.94%.
•The experiment is performed on a common rail direct injection diesel engine.•Hydrogen and Bio-CNG enriched diesel are used as the fuel.•Hydrogen and Bio-CNG mixture proportion in diesel are varied between 0 and 40%.•The engine load is varied between 0 and 80%.•The performance and emission parameters enhanced for 40% gaseous fuel mixture.