A multi-scale model for CO2 sequestration enhanced coalbed methane recovery

Wang, G. X., Wei, X., Rudolph, V., Wei, C. and Qin, Y. (2009) A multi-scale model for CO2 sequestration enhanced coalbed methane recovery. Frontiers of Chemical Engineering in China, 3 1: 20-25. doi:10.1007/s11705-009-0138-0

Author Wang, G. X.
Wei, X.
Rudolph, V.
Wei, C.
Qin, Y.
Title A multi-scale model for CO2 sequestration enhanced coalbed methane recovery
Journal name Frontiers of Chemical Engineering in China   Check publisher's open access policy
ISSN 1673-7474
Publication date 2009-01-07
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11705-009-0138-0
Volume 3
Issue 1
Start page 20
End page 25
Total pages 6
Editor Wang, J.
Place of publication China
Publisher Gaodeng Jiaoyu Chubanshe
Collection year 2010
Language eng
Subject C1
090499 Chemical Engineering not elsewhere classified
859803 Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation)
Abstract This paper presents a multi-scale model to simulate the multicomponent gas diffusion and flow in bulk coals for CO2 sequestration enhanced coalbed methane recovery. The model is developed based on a bi-dispersed structure model by assuming that coal consists of microporous micro-particles, meso/macro-pores and open microfractures. The bi-disperse diffusion theory and the Maxwell-Stefan approach were incorporated in the model, providing an improved simulation of the CH4-CO2/CH4-N2 counter diffusion dynamics. In the model, the counter diffusion process is numerically coupled with the flow of the mixture gases occurring within macro-pores or fractures in coal so as to account for the interaction between diffusion and flow in gas transport through coals. The model was validated by both experimental data from literature and our CO2 flush tests, and shows an excellent agreement with the experiments. The results reveal that the gas diffusivities, in particular the micro-pore diffusivities are strongly concentration-dependent.
Keyword Multi-scale Model
Gas Transport
Coalbed Methane
CO2 Sequestration
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
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Created: Sun, 11 Apr 2010, 11:30:01 EST by Amanda Lee on behalf of School of Chemical Engineering