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Type: Journal article
Title: Characterizations of activated carbon-methanol adsorption pair including the heat of adsorptions
Author: Wu, J.
Madani, S.
Biggs, M.
Phillip, P.
Lei, C.
Hu, E.
Citation: Journal of Chemical and Engineering Data, 2015; 60(6):1727-1731
Publisher: American Chemical Society
Issue Date: 2015
ISSN: 0021-9568
Statement of
Jun W. Wu, S. Hadi Madani, Mark J. Biggs, Pendleton Phillip, Chen Lei, and Eric J. Hu
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
Rights: © 2015 American Chemical Society
DOI: 10.1021/je501113y
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