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Processes 2019, 7(4), 180; https://doi.org/10.3390/pr7040180

Immersion Enthalpy of Activated Carbon–Cyclohexane and Activated Carbon–Hexane. Difference in the Solid–Liquid Interaction Enthalpy Due to the Structure of the Solvent

1
Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Bogotá, Carrera 30 No 45-03, Bogotá Colombia 111321, Colombia
2
Departamento de Química. Facultad de Ciencias. Universidad de los Andes. Carrera 1 este No 18A-10, Bogotá 111321, Colombia
*
Author to whom correspondence should be addressed.
Received: 8 March 2019 / Revised: 19 March 2019 / Accepted: 21 March 2019 / Published: 28 March 2019
(This article belongs to the Special Issue Thermodynamics: Modeling and Simulation)
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Abstract

The enthalpy of immersion for five activated carbons (with different surface chemistry) in cyclohexane and hexane was determined in order to observe the intensity of the solid–liquid interaction. The enthalpy of immersion was related to the properties of activated carbons, such as micropore volume, total basic groups content, and the EoWo product, that characterized each solid-liquid system. The values for the immersion enthalpy were between −21.2 and −91.7 J g−1 for cyclohexane and between −16.4 and −66.1 J g−1 for hexane. It showed greater interaction between the cyclohexane and the activated carbons and it was related to the properties of this adsorbate, such as molecular size and molecular arrangement. The difference in the enthalpy of immersion between the solvents per unit of micropore volume for the set of activated carbons was calculated obtaining a value of −487 J cm−3. View Full-Text
Keywords: enthalpy of immersion; activated carbon; hexane; cyclohexane enthalpy of immersion; activated carbon; hexane; cyclohexane
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hernández-Monje, D.; Giraldo, L.; Moreno-Piraján, J.C. Immersion Enthalpy of Activated Carbon–Cyclohexane and Activated Carbon–Hexane. Difference in the Solid–Liquid Interaction Enthalpy Due to the Structure of the Solvent. Processes 2019, 7, 180.

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