Experimental Investigations on Hydrogen

The paper mainly aims at improving the performance and reduction in exhaust emissions of an indirect injection diesel engine fuelled with alternative and modern biofuel Pinus Sylvestris oil, which is traditionally oxygenated and obtained from the resins of the Pinus Sylvestris tree. Its physical and chemical properties are similar to the regular petro-diesel fuel and can be used without transesterification directly in diesel engines. However, a lower cetane value hinders its direct use in diesel engines. Therefore, this experiment followed a complementary approach to supplement small dosages of gaseous Hydrogen (GH2) to overcome the adverse emission characteristics. Gaseous Hydrogen was inducted through the inlet manifold and controlled by Timed Manifold Injection (TMI) at 5% to 7% of the total energy in 1% increments. Additionally, preheating the inlet air between 40°C to 60°C at 10°C increments was also performed. The supplementation of 6% GH2 and 40°C preheated air showed better results than conventional diesel operation without any engine modifications. All necessary NFPA Class I Division 2 Group B standards were considered during the handling and use of gaseous Hydrogen.