A combined effect of stoichiometric-oxygen-hydrogen gas and alumina nanoparticles on CI engine operating characteristics

This study focuses on using alumina nanoparticles (NPs) and stoichiometric-oxygen-hydrogen (SOH) gas from water electrolyzer as fuel additives. The engine experiments were performed using a 4-stroke, single-cylinder, air-cooled, direct injection diesel engine at 2000 rpm and different loads. Four different concentrations of alumina NPs were used (25, 50, 75 and 100 mg/l) while a constant flowrate of 0.2 l/min of SOH was used. Two base fuels, diesel (D100) and 30% diesel + 70% diesel (B30), were considered. Minimum reduction by 6.8% and 15.6% in bsfc were noticed for 75 mg/l of alumina NPs in in D100 and B30, respectively. A 55% average reduction in bsfc was achieved by addition of SOH to D100. For D100-SOH, the bsfc was noticed to increase with the addition of alumina NPs. The addition of SOH gas to B30 reduced bsfc by 8% compared to B30. The addition of alumina NPs to B30-SOH fuel increased bsfc. The addition of alumina NPs to D100 increased NOx emissions by 12% while a 28% reduction was noticed with the addition of SOH. For B30 and B30-SOH base fuels, scattered profiles of NOx were monitored.

Automated summary

The study found that adding alumina nanoparticles and SOH gas can reduce fuel consumption and nitrogen oxide emissions of diesel engines. However, the effects may vary depending on the combination of different base fuels and additives.