Isobaric (vapour + liquid) equilibrium for N-methyl-2-pyrrolidone with branched alcohols |
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| Authors: | P. Gnanakumari P. Venkatesu Cheng-Ting Hsieh M.V. Prabhakara Rao Ming-Jer Lee Ho-mu Lin |
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| Affiliation: | 1. Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India;2. Department of Chemistry, University of Delhi, Delhi 110 007, India;3. Department of Chemical Engineering, National Taiwan University of Science and Technology, 43 Keelung Road, Section 4, Taipei 106-07, Taiwan |
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| Abstract: | The (vapour + liquid) equilibrium (VLE) and boiling temperature measurements have been determined at 95.3 kPa as a function of composition for the binary liquid mixtures of N-methyl-2-pyrrolidone (NMP) with branched alcohols using a Swietoslawski-ebulliometer. The branched alcohols include 2-propanol, 2-butanol, 2-methyl-l- propanol, 2-methyl-2-propanol, and 3-methyl-l-butanol. The experimental temperature-composition (T–x) results were used to estimate Wilson parameters and then used to calculate the equilibrium vapour compositions and the excess Gibbs free energy at T = 298.15 K. The experimental temperature-composition (T, x) results were correlated with the Wilson, the NRTL and the UNIQUAC models. The experimental results are interpreted in terms of intermolecular interactions between constituent molecules. |
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