Experimental data and modeling for excess enthalpies of 2-Pentanol with n-alkanes (C7-C9) at T=(293.15, 298.15 and 303.15) K

doi:10.1016/j.cjche.2020.03.029

Abstract

Abstract: Excess molar enthalpies, H^E, for the binary mixtures of 2-pentanol with n-alkanes(n-heptane, n-octane, and n-nonane) have been determined at three different temperatures T=(293.15, 298.15 and 303.15) K and normal atmospheric pressure over the entire composition range using a Calvet microcalorimeter. All mixtures show endothermic mixing with the maximum values of the excess enthalpies occurring in the n-alkane-rich region. The H^E data are smoothed using Redlich-Kister equation. The applicability of the Treszczanowicz-Benson, ERAS, Renon-Prausnitz and Chen-Bagley models to correlate H^E of studied mixtures is tested, and the agreement between experimental and theoretical results is satisfactory. Each model includes a self-association equilibrium constant that represents hydrogen bonding and an adjustable parameter that reflects physical interactions.

Key words: Excess molar enthalpy, 2-Pentanol, n-Alkane, Redlich-Kister equation, Correlation

摘要： Excess molar enthalpies, H^E, for the binary mixtures of 2-pentanol with n-alkanes(n-heptane, n-octane, and n-nonane) have been determined at three different temperatures T=(293.15, 298.15 and 303.15) K and normal atmospheric pressure over the entire composition range using a Calvet microcalorimeter. All mixtures show endothermic mixing with the maximum values of the excess enthalpies occurring in the n-alkane-rich region. The H^E data are smoothed using Redlich-Kister equation. The applicability of the Treszczanowicz-Benson, ERAS, Renon-Prausnitz and Chen-Bagley models to correlate H^E of studied mixtures is tested, and the agreement between experimental and theoretical results is satisfactory. Each model includes a self-association equilibrium constant that represents hydrogen bonding and an adjustable parameter that reflects physical interactions.

关键词: Excess molar enthalpy, 2-Pentanol, n-Alkane, Redlich-Kister equation, Correlation

Dongwei Wei, Mengying Li, Jing Ma, Baohe Wang. Experimental data and modeling for excess enthalpies of 2-Pentanol with n-alkanes (C7-C9) at T=(293.15, 298.15 and 303.15) K[J]. Chinese Journal of Chemical Engineering, 2020, 28(6): 1661-1669.

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