Gas content derivative data versus diffusion coefficient
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
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/ |
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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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