Characterizations of Activated Carbon-Methanol Adsorption Pair Including the Heat of Adsorptions

Jun W. Wu, S. Hadi Madani, Mark J. Biggs, Pendleton Phillip, Chen Lei, Eric J. Hu

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

This paper presents adsorption isotherms and isosteric heats of adsorption for methanol vapor adsorption for two commercially available activated carbon samples - 207EA granules and WS-480 pellets (Calgon Carbon, U.S.A.) - which were also fully characterized using nitrogen sorption at 77 K. The heat of adsorption of methanol as a function of loading was determined using the Clausius-Clapeyron approach with isotherms obtained at 5 °C, 15 °C, and 25 °C. The isosteric heats of adsorption increased sharply at the small coverage due to increasing effect of condensation heat with coverage. The heat reached a maximum and then varies little with loading, with the average values at around 46.6 kJ/mol for 207EA and 45.1 kJ/mol for WS-480. The higher heats of adsorption for the former activated carbon reflect its more microporous nature (around 78 % compare to 62 % for WS-480 activated carbon). The heat of adsorption data is also comparable to that obtained elsewhere for other activated carbons.

Original languageEnglish
Pages (from-to)1727-1731
Number of pages5
JournalJournal of Chemical and Engineering Data
Volume60
Issue number6
DOIs
Publication statusPublished - 11 Jun 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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