Gas content derivative data versus diffusion coefficient

Detalhes bibliográficos
Autor(a) principal: Rodrigues, Cristina
Data de Publicação: 2016
Outros Autores: Dinis, Maria Alzira Pimenta, Lemos de Sousa, M. J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10284/7900
Resumo: http://sherpa.ac.uk/romeo/issn/0144-5987/
id RCAP_0abd9d9d56631d88391a97f73ebc220b
oai_identifier_str oai:bdigital.ufp.pt:10284/7900
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Gas content derivative data versus diffusion coefficientDiffusion coefficientGas contentSorptionInflection pointTangent slopeDerivative dataLangmuir modelhttp://sherpa.ac.uk/romeo/issn/0144-5987/The study of the gas diffusion process has a main role in both Coalbed Methane (CBM) production and CO2 injection in geological sequestration projects. The accurate determination of gas diffusion coefficients in unconventional reservoirs such as coal seams, requires a consistent mathematical approach. The study of the gas diffusion process in coal seams was carried out using sorption isotherms. The Langmuir model for individual gases and the extended Langmuir model for multicomponent gas mixtures were applied to fit sorption isotherm data. “Gas content derivative data” and “gas content changes” emerged as crucial mathematical parameters to accurately study the gas diffusion process. The main goal of this paper is to define the degree of interaction between the gas content derivative data and the gas diffusion process. Experiments were performed on three samples selected from two different coals, which were submitted to three different gas compositions, viz 99.999% CH4; 99.999% CO2; and a gas mixture containing 74.99% CH4 + 19.99% CO2 + 5.02% N2, at 35ºC, and at pressures ranging from 0 up to 50 bar. Experimental results obtained from the three samples indicate that during adsorption/desorption processes, the diffusion coefficients increase and the gas content changes decrease when the pressure decreases, due to the sample saturation degrees and to the kinetic mechanisms increase. Additionally, the “gas content derivative data” scattering is slightly lower during the desorption process than during the adsorption process. These behaviors are clearly identified when using methane, but are even more evident when using CO2 and the gas mixture, due to the CO2 interaction with coal porous structure, which induces a considerable resistance to CO2 release. The results show that sample B (CH4 + CO2 + N2) displays higher diffusion coefficient values (this behaviour is mainly related to the presence of N2) than sample C (CH4) and than Sample A (CO2).SAGE PublishingRepositório Institucional da Universidade Fernando PessoaRodrigues, CristinaDinis, Maria Alzira PimentaLemos de Sousa, M. J.2019-09-16T08:31:18Z2016-01-01T00:00:00Z2016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10284/7900engAPA: Rodrigues, C. F., Dinis, M. A. P., & Lemos de Sousa, M. J. (2016). Gas Content Derivative Data Versus Diffusion Coefficient. Energy Exploration & Exploitation, 34(4), 606-620. doi:10.1177/01445987166436292048-405410.1177/0144598716643629info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T02:07:17Zoai:bdigital.ufp.pt:10284/7900Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:44:49.454453Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Gas content derivative data versus diffusion coefficient
title Gas content derivative data versus diffusion coefficient
spellingShingle Gas content derivative data versus diffusion coefficient
Rodrigues, Cristina
Diffusion coefficient
Gas content
Sorption
Inflection point
Tangent slope
Derivative data
Langmuir model
title_short Gas content derivative data versus diffusion coefficient
title_full Gas content derivative data versus diffusion coefficient
title_fullStr Gas content derivative data versus diffusion coefficient
title_full_unstemmed Gas content derivative data versus diffusion coefficient
title_sort Gas content derivative data versus diffusion coefficient
author Rodrigues, Cristina
author_facet Rodrigues, Cristina
Dinis, Maria Alzira Pimenta
Lemos de Sousa, M. J.
author_role author
author2 Dinis, Maria Alzira Pimenta
Lemos de Sousa, M. J.
author2_role author
author
dc.contributor.none.fl_str_mv Repositório Institucional da Universidade Fernando Pessoa
dc.contributor.author.fl_str_mv Rodrigues, Cristina
Dinis, Maria Alzira Pimenta
Lemos de Sousa, M. J.
dc.subject.por.fl_str_mv Diffusion coefficient
Gas content
Sorption
Inflection point
Tangent slope
Derivative data
Langmuir model
topic Diffusion coefficient
Gas content
Sorption
Inflection point
Tangent slope
Derivative data
Langmuir model
description http://sherpa.ac.uk/romeo/issn/0144-5987/
publishDate 2016
dc.date.none.fl_str_mv 2016-01-01T00:00:00Z
2016-01-01T00:00:00Z
2019-09-16T08:31:18Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10284/7900
url http://hdl.handle.net/10284/7900
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv APA: Rodrigues, C. F., Dinis, M. A. P., & Lemos de Sousa, M. J. (2016). Gas Content Derivative Data Versus Diffusion Coefficient. Energy Exploration & Exploitation, 34(4), 606-620. doi:10.1177/0144598716643629
2048-4054
10.1177/0144598716643629
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv SAGE Publishing
publisher.none.fl_str_mv SAGE Publishing
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799130313801072640

Registros relacionados