Amélioration des performances du cycle de refroidissement par adsorption par la pyrolyse du charbon actif Maxsorb III avec du carbonate d'ammonium

Translated title of the contribution: Performance enhancement of adsorption cooling cycle by pyrolysis of Maxsorb III activated carbon with ammonium carbonate

Mohamed Ghazy, Ahmed Askalany, Ali Kamel, Kamal M.S. Khalil, Ramy H. Mohammed, Bidyut Baran Saha

Research output: Contribution to journalArticlepeer-review

Abstract

Maxsorb III is the best available microporous activated carbon. The parent Maxsorb III has been modified by pyrolysis in the presence of ammonia carbonate. The adsorption isotherms and kinetics of HFC404A onto the modified Maxsorb III are experimentally measured over 25 °C to 75 °C. Tóth and Dubinin-Astakhov models are utilized to fit the experimentally measured data. The isosteric heat of adsorption is calculated by applying the Clausius-Clapeyron equation. The adsorption kinetics of the modified Maxsorb III/HFC404A are fitted using the linear driving force model and Fickian Diffusion equation. Experimental measurements indicate that the modified Maxsorb III has a maximum uptake of 2.65 kg.kg−1 of HFC404A at 25 °C, which is the highest reached value till today. Additionally, the adsorption cooling system efficacy is evaluated under typical operating conditions using the modified Maxsorb III/HFC404A pair. The modified Maxsorb III/HFC404A could achieve a specific cooling power (SCP) of 747 W per kg of adsorbent along with a coefficient of performance (COP) of 0.40. Compared to the parent Maxsorb III/HFC404A pair, the pyrolyzed Maxsorb III/HFC404A pair provides the SCP and COP by a factor of 2.23 and 1.7, respectively, which are are the current benchmark.

Translated title of the contributionPerformance enhancement of adsorption cooling cycle by pyrolysis of Maxsorb III activated carbon with ammonium carbonate
Original languageFrench
Pages (from-to)210-221
Number of pages12
JournalInternational Journal of Refrigeration
Volume126
DOIs
Publication statusPublished - Jun 2021

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

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