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dc.contributor.author
Pini, Ronny
dc.contributor.author
Ottiger, Stefan
dc.contributor.author
Burlini, Luigi
dc.contributor.author
Storti, Giuseppe
dc.contributor.author
Mazzotti, Marco
dc.contributor.editor
Gale, John
dc.contributor.editor
Herzog, Howard
dc.contributor.editor
Braitsch, Jay
dc.date.accessioned
2021-06-25T11:48:29Z
dc.date.available
2017-06-08T23:32:08Z
dc.date.available
2021-06-25T11:48:29Z
dc.date.issued
2009-02
dc.identifier.issn
1876-6102
dc.identifier.other
10.1016/j.egypro.2009.01.224
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/19366
dc.identifier.doi
10.3929/ethz-b-000019366
dc.description.abstract
The permeability of the coal seam is the main petrophysical property controlling the performance of the ECBM operation, since it affects both the CO2 injection and CH4 recovery. In the present paper, coal swelling of intact coal samples is studied both under unconstrained and constrained conditions. Unconstrained swelling experiments are performed in a view cell under a static high pressure gas atmosphere, whereas gas injection experiments are carried out in a flow cell, where the sample is subjected to a given hydrostatic confinement. Both experiments are performed by using different gases, namely He, CO2, CH4 and N2, and under typical coal seam conditions, i.e. at high pressure and at 45 ∘C. The results of the unconstrained coal sample showed that swelling increases monotonically with pressure up to a few percents for adsorbing gases, with CO2 swelling coal more than CH4 that swells more than N2, whereas for helium, a non-adsorbing gas, volume changes are negligible. The results of the flow experiments were successfully described using a mathematical model consisting of mass balances accounting for gas flow and adsorption, and mechanical constitutive equations for the description of porosity and permeability changes during injection. Results showed increase in permeability with decreasing effective pressure on the sample. Moreover, when CO2 is used a permeability reduction was observed compared to Helium, which can be explained by taking into account the effects of swelling on the flow dynamics.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject
ECBM
en_US
dc.subject
Swelling
en_US
dc.subject
Permeability
en_US
dc.subject
Adsorption
en_US
dc.subject
Modeling
en_US
dc.title
CO2 storage through ECBM recovery: An experimental and modeling study
en_US
dc.type
Conference Paper
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported
dc.date.published
2009-04-09
ethz.book.title
Greenhouse Gas Control Technologies 9
en_US
ethz.journal.title
Energy Procedia
ethz.journal.volume
1
en_US
ethz.journal.issue
1
en_US
ethz.pages.start
1711
en_US
ethz.pages.end
1717
en_US
ethz.size
7 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.event
9th International Conference on Greenhouse Gas Control Technologies (GHGT-9)
en_US
ethz.event.location
Washington, DC, USA
ethz.event.date
November 16-20, 2008
en_US
ethz.identifier.wos
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03392 - Burg, Jean-Pierre (emeritus)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03392 - Burg, Jean-Pierre (emeritus)
ethz.date.deposited
2017-06-08T23:32:28Z
ethz.source
ECIT
ethz.identifier.importid
imp59364ca34f44671225
ethz.ecitpid
pub:31691
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-14T14:39:12Z
ethz.rosetta.lastUpdated
2024-02-02T14:10:22Z
ethz.rosetta.versionExported
true
ethz.COinS
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