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Isobaric Vapour–Liquid Equilibrium Data Measurement for a Binary System of Green Solvent 2-Methyltetrahydrofuran and Acetic acid at 101.3 kPa

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Abstract

Green solvents are eco-friendly solvents that can play significant role in the reduction in health hazard and safety issues caused by classical solvents. The use of green solvents can be supported and enhanced by providing the data banks of these solvents, particularly vapour–liquid equilibrium (VLE) data that are required for the design of separation systems. A dynamic VLE still based on the Raal modification of Yerazunis et al. (1964) apparatus was employed in the measurement of isobaric VLE data. The VLE still was maintained at 101.3 kPa pressure. The thermodynamic consistency of the measured VLE data was confirmed by Herington’s area test and Van Ness’s point-to-point test. The correlation of VLE data was established by excess Gibbs energy models NRTL, Wilson and UNIQUAC and the result showed that all three models were in good agreement with the experimental data. The absolute average deviation in temperature was 0.3953 K, 0.3823 K, 0.3977 K and the absolute average deviation in vapour-phase composition was 0.0053, 0.0052, 0.0053 for NRTL, Wilson and UNIQUAC models, respectively. The relative volatility chart of 2-MeTHF/Acetic acid versus 2-MeTHF liquid mole fraction showing \(\pm \,5\%\) deviation of experimental data from Wilson model data was also depicted. The comparison of the experimental VLE data with the data predicted by UNIFAC and modified UNIFAC Dortmund methods was made. The VLE data were generated through binary interaction parameters from Aspen Hysys for Wilson, NRTL and UNIQUAC models and compared with the experimental data.

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Abbreviations

\({A}_{i}, {B}_{i}, {C}_{i}\) :

Antoine equation constants

\({g}_{{ij}}\) :

Energy parameter characteristic of the i–j interaction in the NRTL equation

\({u}_{{ij}}\) :

Adjustable interaction parameter in the UNIQUAC equation

\(V_i \) :

Molar volume of component i

\({x}_{{i}}\) :

Liquid-phase mole fraction of component i

\({y}_{i}\) :

Vapour-phase mole fraction of component i

N :

Number of data points

\(\alpha _{{ij}}\) :

Nonrandomness parameter in the NRTL equation

\(\gamma _{i} \) :

Activity coefficient of component i

\(\varLambda _{ij} \) :

Two adjustable parameters of the Wilson equation

\(\lambda _{ij} \) :

Energies of interaction between molecules i and j in the Wilson equation

\(\phi _i \) :

Fugacity coefficient of component i or segment fraction

CPME:

Cyclopentyl methyl ether

GSK:

GlaxoSmithKline

2-MeTHF:

2-Methyltetrahydrofuran

NRTL:

Nonrandom two liquid

%AAD:

Percentage average absolute deviation

Pt-100:

Platinum RTD (resistance temperature detector) with a resistance of 100 \(\Omega \) at \(0\,{^{\circ }}\hbox {C}\)

UNIQUAC:

Universal quasi-chemical

JGCM:

Joint Committee for Guides in Metrology

Cal:

Calculated values

Exp:

Experimental values

i, j, k :

Component identity

lit:

Literature values

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Acknowledgements

This project has been supported financially by Gujarat Council on Science and Technology (GUJCOST), Gandhinagar by awarding minor research project (MRP) grant to this project. The infrastructural support provided by the V.V.P. Engineering College, Rajkot is also highly appreciated.

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Authors and Affiliations

  1. Department of Chemical Engineering, V.V.P. Engineering College, Gujarat Technological University, Ahmedabad, India

    Vyomesh M. Parsana

  2. Department of Chemical Engineering, L.D. College of Engineering, Gujarat Technological University, Ahmedabad, India

    Sachin P. Parikh

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  1. Vyomesh M. Parsana
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Correspondence to Vyomesh M. Parsana.

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This research paper has been a part of the research project funded by Gujarat Council on Science and Technology (GUJCOST) by awarding minor research project (MRP) grant worth INR 520,000.00 to the project “Experimental Determination of Vapour–Liquid Equilibrium of Systems Comprising Green Solvents”.

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Parsana, V.M., Parikh, S.P. Isobaric Vapour–Liquid Equilibrium Data Measurement for a Binary System of Green Solvent 2-Methyltetrahydrofuran and Acetic acid at 101.3 kPa. Arab J Sci Eng 44, 5371–5379 (2019). https://doi.org/10.1007/s13369-018-3638-8

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