Isothermes et cinétique d'adsorption d'une paire d'adsorption de carbone actif/difluoroéthane: théorie et expériences

Translated title of the contribution: Adsorption isotherms and kinetics of activated carbon/Difluoroethane adsorption pair: Theory and experiments

Mohamed Ghazy, K. Harby, Ahmed A. Askalany, Bidyut Baran Saha

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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 75°C have been investigated. Experimental data of adsorption uptake have been fitted with Dubinin–Astakhov (D–A) and Tóth equations. D–A equation is found to be more suitable than Tóth 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.

Original languageFrench
Pages (from-to)196-205
Number of pages10
JournalInternational Journal of Refrigeration
Volume70
DOIs
Publication statusPublished - Oct 1 2016

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Adsorption isotherms
Activated carbon
Adsorption
Kinetics
Experiments
Adsorbents
Refrigerants
Cooling
Gases
Temperature

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

Cite this

Isothermes et cinétique d'adsorption d'une paire d'adsorption de carbone actif/difluoroéthane : théorie et expériences. / Ghazy, Mohamed; Harby, K.; Askalany, Ahmed A.; Saha, Bidyut Baran.

In: International Journal of Refrigeration, Vol. 70, 01.10.2016, p. 196-205.

Research output: Contribution to journalArticle

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AB - 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 75°C have been investigated. Experimental data of adsorption uptake have been fitted with Dubinin–Astakhov (D–A) and Tóth equations. D–A equation is found to be more suitable than Tóth 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.

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