Elsevier

Fluid Phase Equilibria

Volume 227, Issue 1, 1 January 2005, Pages 37-39
Fluid Phase Equilibria

Bubble temperature measurements on the binary mixtures formed by decane with a variety of compounds at 95.8 kPa

https://doi.org/10.1016/j.fluid.2004.10.027Get rights and content

Abstract

Bubble temperatures at 95.8 kPa, over the entire composition range are measured for the binary mixtures formed by decane with cyclohexanone, 1,2-dimethoxyethane, tetrahydrofuran and ortho-, meta- and para-xylenes, making use of a Swietoslawski type ebulliometer. The liquid phase composition versus temperature measurements is found to be well represented by the Wilson model.

Introduction

This investigation leading to the vapor–liquid equilibria of the binary mixtures formed by decane with the variety of compounds (noted in the abstract) is in continuation of our recent systematic studies on the phase equilibria of the binary mixtures formed by alcohols, hydrocarbons and chlorohydrocarbons [1], [2]. There are no published vapor–liquid equilibrium data on the systems chosen for the present study for comparison.

Section snippets

Method

A Swietoslawski type ebulliometer, very similar to the one described by Hala et al. [3] is used for the present set of experiments. The ebulliometer is connected to a vacuum pump and a dry nitrogen gas cylinder, with a closed end manometer in line, to enable the measurement and maintenance of the total pressure of the system within ±0.1 kPa of the chosen value 95.8 kPa, by adjusting the opening of: the needle valve of the gas cylinder or the by pass line of the vacuum pump. A mercury-in-glass

Results and discussion

The experimental composition (x1) versus temperature (T) data, summarized in Table 2 (which also includes estimated values of the vapor phase composition, y1) is fitted to the Wilson model.lnγ1=ln(x1+Λ12x2)+x2[{Λ12/(x1+Λ12x2)}{Λ21/(x2+Λ21x1)}]lnγ2=ln(x2+Λ21x1)+x1[{Λ21/(x2+Λ21x1)}{Λ21/(x1+Λ12x2)}]withΛ12=(V2L/V1L)exp[(λ12λ11)/RT]andΛ21=(V1L/V2L)exp[(λ12λ22)/RT]where λ's are the energies of interaction denoted by the subscripts. The optimum Wilson parameters are obtained by minimizing

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    Fluid Phase Equilib.

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    Vapour Liquid Equilibrium

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There are more references available in the full text version of this article.

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