Mehmet DEMİRALP, Mehmet ÇELİK, İlker ÖRS, Cihan BAYINDIRLI

Investigation of Effect of n-hexane Additives in Biodiesel in Combustion and Exhaust Emissions in Diesel Engines

There are various studies concerning biodiesel fuel and its spraying, combustion and emission properties within the diesel engines. In the diesel engines, the hazardous emissions such as carbonmonoxide (CO), carbondioxide (CO2), hydrocarbon (HC) and particle matter (PM) decreased along with the use of biodiesel. But a slight increase in azotoxit (NOx) emissions was observed due to the use of biodiesel which is an oxygenated fuel. In this study; by volume 4% 12% and 20% n-hexane were added in biodiesel which produced by transesterification method from cottonseed oil. Engine tests were carried out at 6 min-1. The maximum moment obtained at 1400 min-1. The maximum increase in moment is 3.95% in CHX20 fuel, while the specific fuel consumption is reduced by 5.52%. At 1400 min-1, the maximum of cylinder pressure and heat dissipation is increased by increasing of additive ratio. As the n-hexane ratio increases, the emissions of CO, HC and smoke decrease while NOx emissions increase

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