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dc.contributor.authorB. Melnichenko, Yuri
dc.contributor.authorHe, Lilin
dc.contributor.authorSakurovs, Richard
dc.contributor.authorL. Kholodenko, Arkady
dc.contributor.authorBlach, Tomasz
dc.contributor.authorMastalerz, Maria
dc.contributor.authorRadlinski, Andrzej
dc.contributor.authorCheng, Gang
dc.contributor.authorF.R. Mildner, David
dc.date.accessioned2017-05-03T11:14:43Z
dc.date.available2017-05-03T11:14:43Z
dc.date.issued2012
dc.date.modified2013-06-11T04:31:02Z
dc.identifier.issn0016-2361
dc.identifier.doi10.1016/j.fuel.2011.06.026
dc.identifier.urihttp://hdl.handle.net/10072/51386
dc.description.abstractFluid-solid interactions in natural and engineered porous solids underlie a variety of technological processes, including geological storage of anthropogenic greenhouse gases, enhanced coal bed methane recovery, membrane separation, and heterogeneous catalysis. The size, distribution and interconnectivity of pores, the chemical and physical properties of the solid and fluid phases collectively dictate how fluid molecules migrate into and through the micro- and meso-porous media, adsorb and ultimately react with the solid surfaces. Due to the high penetration power and relatively short wavelength of neutrons, small-angle neutron scattering (SANS) as well as ultra small-angle scattering (USANS) techniques are ideally suited for assessing the phase behavior of confined fluids under pressure as well as for evaluating the total porosity in engineered and natural porous systems including coal. Here we demonstrate that SANS and USANS can be also used for determining the fraction of the pore volume that is actually accessible to fluids as a function of pore sizes and study the fraction of inaccessible pores as a function of pore size in three coals from the Illinois Basin (USA) and Bowen Basin (Australia). Experiments were performed at CO 2 and methane pressures up to 780 bar, including pressures corresponding to zero average contrast condition (ZAC), which is the pressure where no scattering from the accessible pores occurs. Scattering curves at the ZAC were compared with the scattering from same coals under vacuum and analysed using a newly developed approach that shows that the volume fraction of accessible pores in these coals varies between ~90% in the macropore region to ~30% in the mesopore region and the variation is distinctive for each of the examined coals. The developed methodology may be also applied for assessing the volume of accessible pores in other natural underground formations of interest for CO 2 sequestration, such as saline aquifers as well as for estimating closed porosity in engineered porous solids of technological importance
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom200
dc.relation.ispartofpageto208
dc.relation.ispartofissue1
dc.relation.ispartofjournalFuel
dc.relation.ispartofvolume91
dc.rights.retentionY
dc.subject.fieldofresearchPhysical Sciences not elsewhere classified
dc.subject.fieldofresearchPhysical Chemistry (incl. Structural)
dc.subject.fieldofresearchChemical Engineering
dc.subject.fieldofresearchMechanical Engineering
dc.subject.fieldofresearchcode029999
dc.subject.fieldofresearchcode0306
dc.subject.fieldofresearchcode0904
dc.subject.fieldofresearchcode0913
dc.titleAccessibility of pores in coal to methane and carbon dioxide
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2012
gro.hasfulltextNo Full Text
gro.griffith.authorBlach, Tomasz P.
gro.griffith.authorRadlinski, Andrzej P.


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