Gas diffusion coefficient in coal: calculation of tangent slope accuracy through the inflection point determination
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/10284/7899 |
Resumo: | http://sherpa.ac.uk/romeo/issn/1062-7391/ |
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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 |
dc.format.none.fl_str_mv |
application/pdf |
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 |
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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 |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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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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1799130313802121216 |