Liquid-liquid equilibria of fuel oxygenate + water + hydrocarbon mixtures. 1

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

DOI:https://doi.org/10.1021/je00017a069· OSTI ID:6562771

Peschke, N ^[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 authors have measured the liquid-liquid equilibria of water + 2, 2, 4-trimethylpentane and water + toluene separately with the four oxygenates ethanol, 2-methoxy-2-methylpropane (methyl tert-butyl ether or MTBE), 2-methoxy-2-methylbutane (tert-amyl methyl ether or TAME), and 2-methyl-2-butanol (tert-amyl alcohol or TAOH) at 25 C. Ethanol with the water + hydrocarbon systems forms a type 1 liquid-liquid phase diagram, while the other water + hydrocarbon + oxygenate systems the authors studied form a type 2 phase diagram. An implication of this is that the addition of ethanol to a water + hydrocarbon mixture leads to a greatly increased solubility of the hydrocarbon in water and water in the hydrocarbon, while the addition of any of the other oxygenates studied leads to no measurable increase in the hydrocarbon solubility in water, and perhaps even a decrease in the solubility. This observation may be important when assessing both the water pollution potential of possible gasoline reformulations and the sensitivity of the gasoline to water. The authors have found that their experimental data can be accurately correlated with either the NRTL or UNIQUAC models. Finally, the liquid-liquid UNIFAC model leads to reasonable, qualitatively correct predictions for the liquid-liquid equilibria of the systems studied.

• OSTI ID: 6562771
• 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
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADDITIVES
ALCOHOLS
ALKANES
ALKYLATED AROMATICS
AQUEOUS SOLUTIONS
AROMATICS
BUTANOLS
DIAGRAMS
DISPERSIONS
EQUATIONS
EQUATIONS OF STATE
ETHANOL
ETHERS
FUEL ADDITIVES
HYDROCARBONS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
POLLUTION
RISK ASSESSMENT
SOLUBILITY
SOLUTIONS
THERMODYNAMIC PROPERTIES
TOLUENE
WATER POLLUTION