Experimental investigation on NG dual fuel engine improvement by hydrogen enrichment

In the present work, NG enrichment with various H2 blends is investigated as a technique for improving dual fuel mode, especially at low loads. Impact on engine performance and emissions is experimentally examined. Total BSFC is considerably reduced. An important benefit in terms of BTE, reaching to increase a 12% with the 10%H2 blend compared to the pure NG case, is also achieved. THC and CO emissions are in general reduced as a result of the improvement of gaseous fuel utilization. CO2 emissions are also in general reduced. Even though a slight increase is in overall observed for NOx emissions, it's almost insignificant.