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Isothermal Vapor-Liquid Equilibria at 333.15K and Thermodynamic Excess Properties for the Binary System of Methanol+Dimethyl Carbonate  

Han, Kyu-Jin (Division of New Materials Engineering, College of Engineering, Chungnam National University)
Park, So-Jin (Division of New Materials Engineering, College of Engineering, Chungnam National University)
Publication Information
Korean Chemical Engineering Research / v.43, no.3, 2005 , pp. 387-392 More about this Journal
Abstract
Recently, dimethyl carbonate (DMC) is considered as an alternative of MTBE (methyl tert-butyl ether), additive for non-leaded gasoline with their fast biodegradation rate and low toxicity. DMC is usually synthesized so far by oxidative carbonylation of methanol, and recently developed synthetic process is also started with methanol. Since the phase equilibria of the system, consisted of DMC and methanol or other reaction products on different temperature and pressure is necessary for the optimum separation process design and operation. However the reported phase equilibria and physical properties for DMC mixtures in the Dortmund Data Bank (DDB; thermodynamic property data bank) are quite rare. Besides, infinitely dilute properties are not found. In this work, isothermal vapor-liquid equilibria at 333.15 K for methanol+DMC binary system and mixing properties, excess molar volume and viscosity deviation at 298.15 K are directly measured and correlated. Additionally, infinitely dilute activity coefficient of methanol in the DMC solvent at three different temperatures are measured and compared with predicted values using modified UNIFAC (Dortmund).
Keywords
Dimethyl Carbonate; Vapor-liquid Equilibrium; Excess Molar Volume; Viscosity Deviation; Infinitely Dilute Activity Coefficient;
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