Adsorption isotherms and kinetics of a mixture of Pentafluoroethane, 1,1,1,2-Tetrafluoroethane and Difluoromethane (HFC-407C) onto granular activated carbon

摘要

In this study, experimental and theoretical adsorption isotherms and kinetics of HFC-407C onto activated carbon have been investigated. AquaSorb 2000 granular activated carbon has been used as adsorbent An experimental apparatus has been designed and built and experimental investigations have been carried out across assorted adsorption temperatures that are useful to the operation of adsorption chillers. Experimental data of the adsorption uptake have been fitted with Dubinin-Astakhov (D-A) and Toth equations. Experimental data of the adsorption kinetics have been fitted with linear driving force (LDF) and Fickian diffusion (FD) models. Both models are found to be able to simulate accurately the adsorption kinetics of the proposed pair. Isosteric heat of adsorption has been estimated based on the Clausius-Clapeyron equation considering non-ideal gas consideration. Pressure-temperature-concentration (P-T-C) diagram of the pair has been also presented. The data extracted here are useful for designing adsorption cooling/heat pump systems. (C) 2015 Elsevier Ltd. All rights reserved.