Adsorption parameter and heat of adsorption of activated carbon/HFC-134a pair

Wai Soong Loh, M. Kumja, Kazi Afzalur Rahman, Kim Choon Ng, Bidyut Baran Saha, Shigeru Koyama, Ibrahim El Sharkawy

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


This article presents the adsorption isotherms of HFC-134a and activated carbon Maxsorb III measured using the constant-volume-variable-pressure method. The adsorption isotherms cover temperature ranges from 293 to 338 K and pressures up to 0.7 MPa. The trends of the experimental isotherms for activated carbon are found to be identical in all cases with previous studies except that the vapor uptake is slightly higher. The adsorption characteristic of the Dubinin-Ashtakov equation has been regressed from the experimental isotherms data and the maximum specific uptake is 2.15 kg of adsorbate adsorbed per kilogram of activated carbon. The heat of adsorption, which is concentration and temperature dependent, has also been extracted from the experiments.

Original languageEnglish (US)
Pages (from-to)910-916
Number of pages7
JournalHeat Transfer Engineering
Issue number11
StatePublished - Jan 2010

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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