Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 70, Issue -, Pages 196-205Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2016.01.012
Keywords
Activated carbon; Adsorption; Adsorption isotherms; Adsorption kinetics; Difluoroethane
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This study introduces a new adsorbent/refrigerant pair to be used in adsorption cooling applications. Adsorption isotherms and kinetics of Difluoroethane (HFC-152a) onto highly porous activated carbon Maxsorb III at temperatures ranging from 25 to 75C have been investigated. Experimental data of adsorption uptake have been fitted with Dubinin-Astakhov (D-A) and Toth equations. D-A equation is found to be more suitable than Toth equation for fitting the adsorption uptake. Experimental results showed that Maxsorb III can adsorb up to 1.3 kg of HFC-152a per kg of adsorbent. Experimental data of adsorption kinetics have been fitted with linear driving force (LDF) and Fickian diffusion (FD) models. Both LDF and FD models are found to be able to simulate the adsorption kinetics of the proposed pair. Isosteric heat of adsorption has been estimated considering the real gas case. Pressure-temperature- concentration (P-T-C) diagram of the pair has been also presented. (C) 2016 Elsevier Ltd and IIR. All rights reserved.
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