Effect of additives on the antiknock properties and Reid vapor pressure of gasoline

The performance of two new oxygenated additives, ethyl acetate and methyl acetate was evaluated on the Reid vapor pressure (RVP),density and Research octane number (RON) of two types of gasoline with different chemical compositions and well defined characteristics (density, volatility and octane numbers). The measured RON and RVP values were compared with those of ethanol and MTBE additives. The gasolines were blended with four different percentages (v/v) of ethyl acetate and methyl acetate. The octane rating of gasoline was found to increase continuously and linearly with the addition of the oxygenated compounds and RVP remain unchanged with the addition of the oxygenated compounds.