Study On Liquid-Liquid Equilibrium For Ternary Systems Containing Ethyl Methyl Carbonate At Different Temperatures

In recent years, more and more serious phenomenon of haze makes people pay more attention to environmental issues. Automobile exhaust emission is one of the reasons which cause the phenomenon of haze. In order to reduce the hydrocarbon pollutants such as CO and NO in automobile exhaust emissions, gasoline additive was usually added to gasoline to improve the quality of oil. So it is imminent to research and develop new and environmental-friendly gasoline additive. Ethyl methyl carbonate(EMC) is a kind of new and environmental-friendly ester, which has many advantages such as high oxygen content, low toxicity, insoluble in water and good stability, etc.The liquid-liquid equilibrium(LLE) data for binary system(water + EMC) and ternary systems(water + methanol + EMC),(water + ethanol + EMC) at T =(298.15,293.15, 298.15, 303.15 and 308.15) K and under atmospheric pressure were measured in this work. And further discussion about the possibility of EMC as gasoline additives was made in this paper.The reliability of the experimental values was verified by using the OthmerTobias and Hand equations. The measured LLE data were correlated by using the Modified and Extended UNIQUAC models. For the two measured ternary systems,the average root-mean-square deviation values of correlated results were 0.74 mol% and1.53mol% for the Modified and Extended UNIQUAC models, respectively. The experimental LLE results were correlated by using the Modified and Extended UNIQUAC models successfully which illustrate that the accuracy and reliability of the experimental data measured in this paper are very high and the calculation results for the ternary systems correlated by Modified UNIQUAC model is more accurate.