Towards an accurate estimation of the isosteric heat of adsorption - A correlation with the potential theory

Ahmed A Askalany; Bidyut B Saha

doi:10.1016/j.jcis.2016.11.040

Towards an accurate estimation of the isosteric heat of adsorption - A correlation with the potential theory

J Colloid Interface Sci. 2017 Mar 15:490:59-63. doi: 10.1016/j.jcis.2016.11.040. Epub 2016 Nov 12.

Authors

Ahmed A Askalany¹, Bidyut B Saha²

Affiliations

¹ Mechanical Engineering Department, Faculty of Industrial Education, Sohag University, Sohag 82524, Egypt. Electronic address: ahmed_askalany3@yahoo.com.
² International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Mechanical Engineering Department, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.

PMID: 27870960
DOI: 10.1016/j.jcis.2016.11.040

Abstract

Accurate estimation of the isosteric heat of adsorption is mandatory for a good modeling of adsorption processes. In this paper a thermodynamic formalism on adsorbed phase volume which is a function of adsorption pressure and temperature has been proposed for the precise estimation of the isosteric heat of adsorption. The estimated isosteric heat of adsorption using the new correlation has been compared with measured values of prudently selected several adsorbent-refrigerant pairs from open literature. Results showed that the proposed isosteric heat of adsorption correlation fits the experimentally measured values better than the Clausius-Clapeyron equation.

Keywords: Adsorbed phase volume; Adsorption; D-A equation; Isosteric heat of adsorption.