Liquid-liquid equilibria of fuel oxygenate + water + hydrocarbon mixtures. 2

Journal Article · · Journal of Chemical and Engineering Data; (United States)

DOI:https://doi.org/10.1021/je00017a070· OSTI ID:6548502

Hellinger, S ^[1]; Sandler, S I ^[2]

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1. Technische Univ. Berlin (Germany). Inst. fuer Thermodynamik und Reaktiontechnik
2. Univ. of Delaware, Newark, DE (United States)

The liquid-liquid equilibria of water + n-decane, water + n-hexadecane, and water + methylcyclohexane have been measured separately with the two oxygenates 2-methoxy-2-methylbutane (tertiary amyl methyl ether or TAME) and 2-methyl-2-butanol (tertiary amyl alcohol or TAOH) at 25 C. All of these systems exhibit type 2 liquid-liquid phase diagrams, through the shapes of the diagrams for the TAME and TAOH systems are quite different because of the much higher solubility of water in TAOH than TAME. One of the observations from their experimental data is that the addition of either TAME or TAOH to a hydrocarbon + water mixture results in an increased water solubility in the hydrocarbon phase and a decreased hydrocarbon solubility in the aqueous phase. This observation may be important when both the water pollution potential of possible gasoline reformulations and the sensitivity of the gasoline to water are assessed. The authors have found that the general features of the liquid-liquid phase diagrams can be accurately correlated with either the NRTL or UNIQUAC model, through some of the high dilution concentrations are incorrectly described. Finally, the liquid-liquid UNIFAC model leads to qualitatively correct predictions for the liquid-liquid equilibria of the systems studied.

• OSTI ID: 6548502
• Journal Information: Journal of Chemical and Engineering Data; (United States), Journal Name: Journal of Chemical and Engineering Data; (United States) Vol. 40:1; ISSN JCEAAX; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
100300* -- Synthetic Fuels-- Properties & Composition-- (1990-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADDITIVES
ALCOHOLS
ALKANES
AQUEOUS SOLUTIONS
BUTANOLS
CYCLOALKANES
DECANE
DISPERSIONS
ETHERS
FUEL ADDITIVES
HEXADECANE
HYDROCARBONS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION
SOLUBILITY
SOLUTIONS
THERMODYNAMIC PROPERTIES
WATER POLLUTION