SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (6): 1661-1669.DOI: 10.1016/j.cjche.2020.03.029

• Chemical Engineering Thermodynamics • 上一篇    下一篇

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

Dongwei Wei, Mengying Li, Jing Ma, Baohe Wang   

  1. Key Laboratory for Green Chemical Technology of Ministry of Education, Research and Development Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China
  • 收稿日期:2019-10-08 修回日期:2020-01-30 出版日期:2020-06-28 发布日期:2020-07-29
  • 通讯作者: 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

Dongwei Wei, Mengying Li, Jing Ma, Baohe Wang   

  1. Key Laboratory for Green Chemical Technology of Ministry of Education, Research and Development Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China
  • Received:2019-10-08 Revised:2020-01-30 Online:2020-06-28 Published:2020-07-29
  • Contact: Jing Ma, Baohe Wang

摘要: Excess molar enthalpies, HE, 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 HE data are smoothed using Redlich-Kister equation. The applicability of the Treszczanowicz-Benson, ERAS, Renon-Prausnitz and Chen-Bagley models to correlate HE 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

Abstract: Excess molar enthalpies, HE, 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 HE data are smoothed using Redlich-Kister equation. The applicability of the Treszczanowicz-Benson, ERAS, Renon-Prausnitz and Chen-Bagley models to correlate HE 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