Elsevier

Fluid Phase Equilibria

Volume 239, Issue 2, 31 January 2006, Pages 183-187
Fluid Phase Equilibria

Total pressure and excess Gibbs energy for the ternary mixture di-isopropyl ether + 1-propanol + benzene and its corresponding binary systems at 313.15 K

https://doi.org/10.1016/j.fluid.2005.11.014Get rights and content

Abstract

Total pressure measurements are reported for the ternary system ‘di-isopropyl ether + 1-propanol + benzene’ and two of the binary systems involved ‘di-isopropyl ether + 1-propanol’ and ‘1-propanol + benzene’ at 313.15 K. Data reduction by Barker's method provides correlations for GE using the Margules equation for the binary systems and the Wohl expansion for the ternary system. Wilson, NRTL and UNIQUAC models have been applied successfully to both the binary and the ternary systems.

Introduction

Accurate vapour–liquid equilibria measurements are essential for the improvement and the development of thermodynamic models. Also they are useful for simulation, design, production and efficiency in industrial plants.

The static technique used for measuring total pressure allows high accuracy data of phase equilibria not only for binary mixtures also for ternary systems, which are scarce in literature.

Oxygenated compounds such as ethers and alcohols are used as blending agents in the formulation of new gasolines for enhancing the octane number and reducing emissions. Our group is contributing to a better knowledge of them through the measurements of vapour–liquid equilibrium of binary and ternary systems containing ethers, alcohols and hydrocarbons, and some of them have been included in the most well-known databases.

In this paper, a new ternary system di-isopropyl ether + 1-propanol + benzene and two of the binary systems involved di-isopropyl ether + 1-propanol and 1-propanol + benzene are reported, the third binary was measured before [1].

Only data for 1-propanol + benzene at 313.15 K have been found in the literature [2], [3] and a comparison has been carried out.

Section snippets

Materials and experimental method

All the materials used were purchased from Fluka Chemie AG and were of the highest purity available, chromatography quality reagents (of the series puriss. p.a.) with a purity >99.0% (GC) for di-isopropyl ether, >99.5% (GC) for benzene and >99.9% (GC) for 1-propanol. They were degassed prior to measurements using a modified distillation method based on the technique of Van Ness and Abbott [4], under vacuum. In Table 1, the vapour pressures of the pure compounds measured in this work are

Results

Data reduction for the binary and ternary mixtures was done by Barker's method according to well-established procedures [7], [8]. The non-ideality of the vapour phase was taken into account with the virial equation of state, truncated after the second term. The second virial coefficients are calculated by Hayden and O’Connell method [9] using the coefficients given by Dymond and Smith [10], these values are given in Table 1.

The five-parameter Margules equation has been used for data correlation

Discussion

Both binary systems measured in this work are quite good correlated using the five-parameter Margules equation. The root mean square deviation between experimental and calculated pressure is 6 Pa with a maximum deviation of 10 Pa for DIPE + 1-propanol and they are 13 and 20 Pa, respectively, for benzene + 1-propanol. Experimental px data for the binary systems are shown in Fig. 1. In Fig. 1 the calculated vapour phase compositions are also plotted.

These binary systems present a large positive

Acknowledgement

Support for this work came from the Spanish Ministry of Science and Technology, project PPQ2002-04414-C02-02.

References (19)

  • J.M. Rhodes et al.

    Fluid Phase Equilib.

    (2001)
  • L.M. Lozano et al.

    Fluid Phase Equilib.

    (1995)
  • J.J. Segovia et al.

    Fluid Phase Equilib.

    (1997)
  • D. Ambrose et al.

    J. Chem. Thermodyn.

    (1976)
  • D. Ambrose et al.

    J. Chem. Thermodyn.

    (1987)
  • D. Ambrose

    J. Chem. Thermodyn.

    (1981)
  • C.R. Chamorro et al.

    Entropie

    (1999)
  • P. Oracz

    Int. DATA Ser. Sel. Data Mixtures, Ser. A

    (1996)
  • H.C. Van Ness et al.

    Ind. Eng. Chem. Fundam.

    (1978)
There are more references available in the full text version of this article.

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