Isothermal Vapor–Liquid Equilibrium Data of Propan-1-ol + 2,2,4-Trimethylpentane and Butan-1-ol + 2,2,4-Trimethylpentane at 318.15 K

Abstract

In this research, vaporÀliquid equilibrium (VLE) data were determined at 318.15 K for the mixtures propan-1-ol + 2,2,4-trimethylpentane and butan-1-ol + 2,2,4-trimethylpentane in an isothermic Othmer still with recirculation, where the temperature was kept constant by means of a proportional-integral (PI) cascade control for the vapor phase. The equilibrium concentration for each phase was determined by gas chromatography, and the vapor phase was considered as nonideal. The consistency of the data was verified by means of the Van Ness direct test of thermodynamic consistency, supported by several thermodynamic methods based on the GibbsÀDuhem equation. The correlation of the VLE data was carried out using the Wilson local composition model. The alkanol + 2,2,4-trimethylpentane mixtures studied exhibit positive contributions from ideality and azeotropic behavior.

The Addition of N-Butanol in Ethanol-Isooctane Mixture to Reduce Vapor Pressure of Oxygenated-Gasoline Blend

“…With these properties, ethanol-butanol mixture may be considered as promising oxygenated gasoline In order to design applicable oxygenated (nbutanol/ethanol) -gasoline blend, the knowledge of vapor pressure values for the systems containing ethanol, n-butanol and isooctane is necessary. Several studies have been reported for vapor pressure measurement of the binary systems containing isooctane, ethanol and n-butanol [10][11][12]. There was only one study reporting for vapor pressure of the ternary system containing isooctane, n-butanol and 1-hexene (without ethanol) [13].…”