Gas Diffusion in Coal Powders is a Multi-rate Process

Gas migration in coal is strongly controlled by surface diffusion of adsorbed gas within the coal matrix. Surface diffusion coefficients are obtained by inverse modelling of transient gas desorption data from powdered coals. The diffusion coefficient is frequently considered to be dependent on time...

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Detalles Bibliográficos
Autores: Mathias, Simon A.M., Dentz, Marco, Liu, Qingquan
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/198398
Acceso en línea:http://hdl.handle.net/10261/198398
Access Level:acceso abierto
Palabra clave:Coal-bed methane
Diffusion coefficient
Gas desorption
Multi-rate
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spelling Gas Diffusion in Coal Powders is a Multi-rate ProcessMathias, Simon A.M.Dentz, MarcoLiu, QingquanCoal-bed methaneDiffusion coefficientGas desorptionMulti-rateGas migration in coal is strongly controlled by surface diffusion of adsorbed gas within the coal matrix. Surface diffusion coefficients are obtained by inverse modelling of transient gas desorption data from powdered coals. The diffusion coefficient is frequently considered to be dependent on time and initial pressure. In this article, it is shown that the pressure dependence can be eliminated by performing a joint inversion of both the diffusion coefficient and adsorption isotherm. A study of the log–log slope of desorbed gas production rate against time reveals that diffusion within the individual coal particles is a multi-rate process. The application of a power-law probability density function of diffusion rates enables the determination of a single gas diffusion coefficient that is constant in both time and initial pressure. © 2019, The Author(s).Peer reviewedSpringer NatureEuropean Research CouncilDentz, Marco [0000-0002-3940-282X]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/198398reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/617511https://doi.org/10.1007/s11242-019-01376-xSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1983982026-05-22T06:33:51Z
dc.title.none.fl_str_mv Gas Diffusion in Coal Powders is a Multi-rate Process
title Gas Diffusion in Coal Powders is a Multi-rate Process
spellingShingle Gas Diffusion in Coal Powders is a Multi-rate Process
Mathias, Simon A.M.
Coal-bed methane
Diffusion coefficient
Gas desorption
Multi-rate
title_short Gas Diffusion in Coal Powders is a Multi-rate Process
title_full Gas Diffusion in Coal Powders is a Multi-rate Process
title_fullStr Gas Diffusion in Coal Powders is a Multi-rate Process
title_full_unstemmed Gas Diffusion in Coal Powders is a Multi-rate Process
title_sort Gas Diffusion in Coal Powders is a Multi-rate Process
dc.creator.none.fl_str_mv Mathias, Simon A.M.
Dentz, Marco
Liu, Qingquan
author Mathias, Simon A.M.
author_facet Mathias, Simon A.M.
Dentz, Marco
Liu, Qingquan
author_role author
author2 Dentz, Marco
Liu, Qingquan
author2_role author
author
dc.contributor.none.fl_str_mv European Research Council
Dentz, Marco [0000-0002-3940-282X]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Coal-bed methane
Diffusion coefficient
Gas desorption
Multi-rate
topic Coal-bed methane
Diffusion coefficient
Gas desorption
Multi-rate
description Gas migration in coal is strongly controlled by surface diffusion of adsorbed gas within the coal matrix. Surface diffusion coefficients are obtained by inverse modelling of transient gas desorption data from powdered coals. The diffusion coefficient is frequently considered to be dependent on time and initial pressure. In this article, it is shown that the pressure dependence can be eliminated by performing a joint inversion of both the diffusion coefficient and adsorption isotherm. A study of the log–log slope of desorbed gas production rate against time reveals that diffusion within the individual coal particles is a multi-rate process. The application of a power-law probability density function of diffusion rates enables the determination of a single gas diffusion coefficient that is constant in both time and initial pressure. © 2019, The Author(s).
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/198398
url http://hdl.handle.net/10261/198398
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/617511
https://doi.org/10.1007/s11242-019-01376-x
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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