مرکز منطقه ای اطلاع رساني علوم و فناوري - Improvement of Performance and Exhaust Emissions in Diesel Engines by Addition of n-hexadecane Material

Abstract :

Physical and chemical properties of fuels significantly affect engine performance and emissions. Various additives are added to the fuel to improve fuel quality, better combustion and reduce emissions. These additives create a catalytic effect for better combustion of hydrocarbons. In this study, the effect of varying fuel properties on engine performance and exhaust emissions of n-hexadecane additive added to diesel fuel was investigated. As a result of the experiments, while the viscosity of n-hexadecane added fuels decreased, the cetane number increased. This improvement in fuel properties leads to better atomization and increased combustion quality when fuel is injected into the fuel cylinder. As a result, the best improvement was obtained at 16% n-hexadecane (DHD16) ratio. At 2800 1/min, the power increases by 1.06% compared to diesel fuel (D0) while the brake specific fuel consumption decreases by 2.38%. Carbon monoxide (CO) emission decreases by 10.24%, hydrocarbon (HC) emission decreases by 19.31% and smoke emission decreases by 19.96%. Improvement of combustion quality caused increase of heat emission while nitrogen oxide (NOx) increased the emission by 6.66%. Due to the increase in cetane number, the maximum cylinder pressure increased and the ignition delay decreased.