A new adsorption-desorption model for water adsorption in porous carbons

Horikawa, T, Sekida, T, Hayashi, J, Katoh, M and Do, DD (2011) A new adsorption-desorption model for water adsorption in porous carbons. Carbon, 49 2: 416-424. doi:10.1016/j.carbon.2010.09.038

Author Horikawa, T
Sekida, T
Hayashi, J
Katoh, M
Do, DD
Title A new adsorption-desorption model for water adsorption in porous carbons
Journal name Carbon   Check publisher's open access policy
ISSN 0008-6223
Publication date 2011-02
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.carbon.2010.09.038
Volume 49
Issue 2
Start page 416
End page 424
Total pages 9
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2011
Language eng
Abstract A new model is proposed to describe the adsorption and desorption branches of water adsorption in carefully synthesized mesoporous carbon materials. This model is an extension of a previous adsorption-desorption model proposed by Do et al. We prepared mesoporous resorcinol-formaldehyde carbon cryogels (RFCCs) by sol-gel polycondensation of resorcinol with formaldehyde in a slightly basic aqueous solution, followed by drying with freeze-drying and then carbonizing the RF cryogels at a high temperature under a nitrogen atmosphere. The resulting carbon materials have different surface and pore properties, which are valuable in the study of their effects on water vapor adsorption and desorption on RFCCs. The experimental data were used to test the model, and we have found that the model describes reasonably well all the data. We have also observed some interesting, but not unexpected, results in the analysis: the water cluster size in mesopore is larger than that in micropore, and the hysteresis loop of adsorption-desorption in mesopores is greater than that in micropores. © 2010 Elsevier Ltd. All rights reserved.
Keyword Activated carbon
Vapor adsorption
Isotherm model
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 24 September 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
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Created: Sun, 30 Jan 2011, 00:06:30 EST