Pore Accessibility of Methane and Carbon Dioxide in Coals

Bae, J.-S., Bhatia, S. K., Rudolph, V. and Massarotto, P. (2009) Pore Accessibility of Methane and Carbon Dioxide in Coals. ENERGY & FUELS, 23 6: 3319-3327. doi:10.1021/ef900084b

Author Bae, J.-S.
Bhatia, S. K.
Rudolph, V.
Massarotto, P.
Title Pore Accessibility of Methane and Carbon Dioxide in Coals
Journal name ENERGY & FUELS   Check publisher's open access policy
ISSN 0887-0624
Publication date 2009-05
Year available 2009
Sub-type Article (original research)
DOI 10.1021/ef900084b
Volume 23
Issue 6
Start page 3319
End page 3327
Total pages 9
Editor Klein, M. T.
Place of publication USA
Publisher American Chemical Society Publications
Collection year 2010
Language eng
Subject 050301 Carbon Sequestration Science
850602 Energy Storage (excl. Hydrogen)
Abstract Two Australian coals were heat-treated, and the accessibility of the pore space to CH4 and CO2 was investigated. Samples heat-treated at 573 and 673 K exhibit larger adsorption/desorption hysteresis and smaller surface areas (measured by CO2 adsorption at 273 K) than untreated samples. For samples heat-treated at 773 K, however, the surface area increased by 50% and the hysteresis was lower, compared to untreated samples. These results demonstrate that volatile hydrocarbons at pore mouths are the cause of energy barriers that prevent adsorbing molecules from passing through. A conceptual model is proposed to illustrate changes in activation energy at constricted pore mouths. Also, the results suggest that both adsorption and desorption isotherms should be measured to determine kinetically inaccessible pore spaces in order to correctly estimate CH4 recovery and CO2 storage capacity. The results have importance to the problem of estimating CH4 recovery and CO2 storage capacity for CO2 geosequestration as part of a CO2-enhanced coal bed methane recovery operation.
Keyword High-Pressure Adsorption
Argonne Premium Coals
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 20 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 03 Sep 2009, 07:54:11 EST by Mr Andrew Martlew on behalf of School of Chemical Engineering