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Excess Molar Enthalpies of Monoethanolamine (MEA) + Primary Alkan-1-ols (C3–C6) and their Fitting with Wilson, NRTL and UNIQUAC Models at 298.15 K

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Abstract

Excess molar enthalpies, \({H}_{\text{m}}^{\text{E}}\) of binary mixtures of monoethanolamine (MEA) with propan-1-ol, butan-1-ol, pentan-1-ol and hexan-1-ol were calculated from calorimetric measurements at 298.15 K using a Parr 1455 solution calorimeter. The excess molar enthalpy \({H}_{\text{m}}^{\text{E}}\) excess partial molar enthalpies, \({H}_{i}^{\text{E}}\) and excess partial molar enthalpies at infinite dilution, \(H_{i}^{{{\text{E}},\infty }}\) were calculated. The sign of \({H}_{\text{m}}^{\text{E}}\) for all mixtures are positive. The obtained values were used to evaluate the nature and type of intermolecular interactions in multicomponent mixtures. The experimental enthalpy data have been correlated with three thermodynamic models, the Wilson, UNIQUAC and NRTL, based on the local composition theory. The maximum \({H}_{\text{m}}^{\text{E}}\) values were observed about 0.6 mol fraction of monoethanolamine (MEA). The experimental results were fitted by the Redlich–Kister polynomial equation. The results were analyzed to discuss the effect of the alkan-1-ols chain length, the orientation and number of the OH groups and the structural deformation of the molecules in the presence of dissimilar molecules.

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Acknowledgements

We are thankful to Bu-Ali Sina University for providing the necessary facilities to carry out the work.

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Authors and Affiliations

  1. Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran

    Fahime Forghani & Hossein Iloukhani

  2. Department of Reasearch and Development, Bu-Ali Sina Food Industrial Company, Hamedan, Iran

    Khatereh Khanlarzadeh

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  1. Fahime Forghani
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  2. Hossein Iloukhani
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  3. Khatereh Khanlarzadeh
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Correspondence to Hossein Iloukhani.

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Forghani, F., Iloukhani, H. & Khanlarzadeh, K. Excess Molar Enthalpies of Monoethanolamine (MEA) + Primary Alkan-1-ols (C3–C6) and their Fitting with Wilson, NRTL and UNIQUAC Models at 298.15 K. J Solution Chem 51, 1–13 (2022). https://doi.org/10.1007/s10953-021-01130-2

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