Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination

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/10284/7899
Resumo: http://sherpa.ac.uk/romeo/issn/1062-7391/
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spelling Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determinationDiffusionDiffusion coefficientSorptionInflection pointTangent slopehttp://sherpa.ac.uk/romeo/issn/1062-7391/This investigation aims to develop an accurate method to calculate the tangent slope (b) - a fundamental parameter to calculate gas diffusion coefficients under different pressures - using inflection point determinations. The authors also studied the different tangent slope behaviours depending on the experimental gas sorption used. The single Langmuir model, for individual gases, and the extended Langmuir model, for multicomponent gas mixtures, were applied to fit experimental gas sorption isotherm data. Two coals were selected in order to minimize and/or avoid the maceral composition and vitrinite mean random reflectance effects. Samples 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. Results showed that the first and the second derivatives calculated to define the first inflection points represent exactly the final limit of tangent slopes.Springer VerlagRepositório Institucional da Universidade Fernando PessoaRodrigues, CristinaDinis, Maria Alzira PimentaLemos de Sousa, M. J.2019-09-16T08:26:43Z2016-01-01T00:00:00Z2016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10284/7899engAPA: Rodrigues, C. F., Dinis, M. A. P., & Lemos de Sousa, M. J. (2016). Gas Diffusion Coefficient in Coal: Calculation of Tangent Slope Accuracy Through the Inflection Point Determination. Journal of Mining Science, 52(1), 87-101. doi:10.1134/s10627391160101621573-873610.1134/S1062739116010162metadata only accessinfo: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:10284/7899Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:44:49.508813Repositório 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 diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
title Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
spellingShingle Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
Rodrigues, Cristina
Diffusion
Diffusion coefficient
Sorption
Inflection point
Tangent slope
title_short Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
title_full Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
title_fullStr Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
title_full_unstemmed Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
title_sort Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
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
Diffusion coefficient
Sorption
Inflection point
Tangent slope
topic Diffusion
Diffusion coefficient
Sorption
Inflection point
Tangent slope
description http://sherpa.ac.uk/romeo/issn/1062-7391/
publishDate 2016
dc.date.none.fl_str_mv 2016-01-01T00:00:00Z
2016-01-01T00:00:00Z
2019-09-16T08:26:43Z
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/10284/7899
url http://hdl.handle.net/10284/7899
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 Diffusion Coefficient in Coal: Calculation of Tangent Slope Accuracy Through the Inflection Point Determination. Journal of Mining Science, 52(1), 87-101. doi:10.1134/s1062739116010162
1573-8736
10.1134/S1062739116010162
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Springer Verlag
publisher.none.fl_str_mv Springer Verlag
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
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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
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