Partial miscibility behavior of the methane + ethane + n-docosane and the methane + ethane + n-tetradecylbenzene ternary mixtures

Abstract

The llquid-llquld-vapor (LLV) partial miscibility behavior of the mixtures methane + ethane + n-docosane and methane + ethane + n -tetradecylbenzene is experimentally studied by use of a visual cell (stoichiometric) technique. Phase compositions and molar volumes of the three fluid phases In equilibrium are reported as functions of temperature and pressure within the regions. Also presented are LLV phase equilibria data for the binary system ethane + n -tetradecylbenzene. The two ternary systems have constituent binary mixtures that exhibit LLV partial miscibility. In pressure-temperature space, the addition of the third component, methane, promotes growth of the three-phase LLV region from the binary LLV locus toward the vapor pressure curve of methane. The three-phase regions of both ternary systems are bounded from above by an upper critical end point (L-L=V) locus, from below by a lower critical end point (L=L-V) locus, and at low temperatures by a four-phase (SLLV) locus.

Partial Miscibility Behavior of the Ternary Mixture Carbon Dioxide + n-Tetradecane + Methanol

“…Experimental Apparatus and Procedure Fall and Luks (1984) and Jangkamolkulchai and Luks (1989) give a detailed description of the experimental apparatus. The procedures for performing the llg studies are described by Fall et al (1985) and Jangkamolkulchai and Luks (1989).…”

“…Experimental Apparatus and Procedure Fall and Luks (1984) and Jangkamolkulchai and Luks (1989) give a detailed description of the experimental apparatus. The procedures for performing the llg studies are described by Fall et al (1985) and Jangkamolkulchai and Luks (1989). The experimental apparatus employs a stoichiometric approach wherein known amounts of ntetradecane and methanol are added to a volumetrically calibrated visual (glass) equilibrium cell.…”

Multiphase equilibrium behavior of the mixture carbon dioxide + ethane + methanol

“…The procedure for performing llg studies was described in another paper by Fall et al (17). These descriptions were updated by Jangkamolkulchai and Luks (18). The experimental apparatus employs a stoichiometric approach wherein a known amount of methanol is added to a volumetrically calibrated visual (glass) equilibrium cell.…”

Solubility of Solids and Liquids in Supercritical Fluids

“…The reader should refer, for example, to the papers published by the group working in Delft (Peters (1986), de Loos et al (1983, Peters et al (1987), De Leeuw et al (1989) for a complete description of the apparatus and methods, even if they rarely have applied their techniques to the measurement of the solubility of solutes in supercritical fluids. An example of measurement of solubilities by this method is reported by Hong and Lucks (1992): they have used the apparatus previously developed by Fall and Luks (1984) and by Jangkamolkulchai and Luks (1989). They obtained solid-liquid-gas equilibrium data in which the solid phase is infinitesimal.…”