Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites

In this work, the characterization of the non-covalently bonded compounds present in a set of perhydrous coals of different age and geographical location (Cretaceous coals: UCV and TCV and Jurassic coals: AJV, PGJV, WJVh and WJVl) was carried out by means of a combination of the analyses of the mate...

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Autores: Iglesias, María José, Río Andrade, José Carlos del, Laggoun-Défarge, Fatima, Cuesta, María José, Suárez Ruiz, Isabel
Formato: artículo
Fecha de publicación:2003
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/2607
Acesso em linha:http://hdl.handle.net/10261/2607
Access Level:acceso abierto
Palavra-chave:Perhydrous coal
Vitrinite
Soluble material
Thermal extract
Trapped compounds
NMR
Py–GC/MS (Curie temperature: 350°C)
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spelling Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinitesIglesias, María JoséRío Andrade, José Carlos delLaggoun-Défarge, FatimaCuesta, María JoséSuárez Ruiz, IsabelPerhydrous coalVitriniteSoluble materialThermal extractTrapped compoundsNMRPy–GC/MS (Curie temperature: 350°C)In this work, the characterization of the non-covalently bonded compounds present in a set of perhydrous coals of different age and geographical location (Cretaceous coals: UCV and TCV and Jurassic coals: AJV, PGJV, WJVh and WJVl) was carried out by means of a combination of the analyses of the material soluble in chloroform and the thermal extract. The extract in chloroform was studied through GC/MS and NMR and the thermovaporized fraction was obtained by means of flash pyrolysis at the Curie temperature of 350°C and quantified by on-line GC-MS. The results obtained for the Cretaceous coals confirm that the substances responsible for the hydrogenation are those covalently bonded to the vitrinite network as a result of the modifications undergone by the botanical precursors. Despite the striking similarity in the global characteristics of these two coals (TCV and UCV) significant differences between the material non-covalently bonded to their coal matrices were found. These differences are attributed to the type of resins present in the coals and/or to their different degree of evolution. With respect to the Jurassic coals, the present study allows the process by which the hydrogenated substances were assimilated into their structure to be established. The characterization of the assimilated substances in the WJVl coal reveals an unexpectedly high incorporation of alkanes given the humic origin of this sample. From these results the assimilation of hydrogen-rich substances from the decomposition of the organic remains in the sedimentary environment in which WJVl precursor were deposited, is proposed. The incorporation of products derived from the primary decomposition of organic material is not evident for the WJVh and AJV coals. The substances assimilated into the coal matrices show a higher aromaticity, the aromatic structures of WJVh being more condensed than those found in AJV. The compositional differences between them probably arise from the different source of the hydrogen-rich material. In the case of AJV coal the source was the adsorption of hydrocarbons generated and migrated from the Pliensbachian source-rocks whereas in WJVh, assimilated compounds come from the material generated by the thermal transformation (coalification) of the adjacent organic rocks of similar age. Finally, PGJV shows two types of non-covalently bonded compounds. Solvent extractable material is mainly composed of the first type of compounds, which is predominantly aliphatic in nature with a preponderance of alkanes. The second type of compounds is more aromatic and they are probably located in the close porosity of this coal. They are not accessible to chloroform but they are the most abundant in the thermal extract.The financial support for this work was provided through a contract with the European Community (No. 7220/EC-769).Peer reviewedElsevierEuropean Commission200720072003info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501292130 bytesapplication/pdfhttp://hdl.handle.net/10261/2607reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/26072026-05-22T06:33:51Z
dc.title.none.fl_str_mv Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
title Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
spellingShingle Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
Iglesias, María José
Perhydrous coal
Vitrinite
Soluble material
Thermal extract
Trapped compounds
NMR
Py–GC/MS (Curie temperature: 350°C)
title_short Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
title_full Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
title_fullStr Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
title_full_unstemmed Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
title_sort Chemical-structural characterization of solvent and thermal extractable material from perhydrous vitrinites
dc.creator.none.fl_str_mv Iglesias, María José
Río Andrade, José Carlos del
Laggoun-Défarge, Fatima
Cuesta, María José
Suárez Ruiz, Isabel
author Iglesias, María José
author_facet Iglesias, María José
Río Andrade, José Carlos del
Laggoun-Défarge, Fatima
Cuesta, María José
Suárez Ruiz, Isabel
author_role author
author2 Río Andrade, José Carlos del
Laggoun-Défarge, Fatima
Cuesta, María José
Suárez Ruiz, Isabel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv European Commission
dc.subject.none.fl_str_mv Perhydrous coal
Vitrinite
Soluble material
Thermal extract
Trapped compounds
NMR
Py–GC/MS (Curie temperature: 350°C)
topic Perhydrous coal
Vitrinite
Soluble material
Thermal extract
Trapped compounds
NMR
Py–GC/MS (Curie temperature: 350°C)
description In this work, the characterization of the non-covalently bonded compounds present in a set of perhydrous coals of different age and geographical location (Cretaceous coals: UCV and TCV and Jurassic coals: AJV, PGJV, WJVh and WJVl) was carried out by means of a combination of the analyses of the material soluble in chloroform and the thermal extract. The extract in chloroform was studied through GC/MS and NMR and the thermovaporized fraction was obtained by means of flash pyrolysis at the Curie temperature of 350°C and quantified by on-line GC-MS. The results obtained for the Cretaceous coals confirm that the substances responsible for the hydrogenation are those covalently bonded to the vitrinite network as a result of the modifications undergone by the botanical precursors. Despite the striking similarity in the global characteristics of these two coals (TCV and UCV) significant differences between the material non-covalently bonded to their coal matrices were found. These differences are attributed to the type of resins present in the coals and/or to their different degree of evolution. With respect to the Jurassic coals, the present study allows the process by which the hydrogenated substances were assimilated into their structure to be established. The characterization of the assimilated substances in the WJVl coal reveals an unexpectedly high incorporation of alkanes given the humic origin of this sample. From these results the assimilation of hydrogen-rich substances from the decomposition of the organic remains in the sedimentary environment in which WJVl precursor were deposited, is proposed. The incorporation of products derived from the primary decomposition of organic material is not evident for the WJVh and AJV coals. The substances assimilated into the coal matrices show a higher aromaticity, the aromatic structures of WJVh being more condensed than those found in AJV. The compositional differences between them probably arise from the different source of the hydrogen-rich material. In the case of AJV coal the source was the adsorption of hydrocarbons generated and migrated from the Pliensbachian source-rocks whereas in WJVh, assimilated compounds come from the material generated by the thermal transformation (coalification) of the adjacent organic rocks of similar age. Finally, PGJV shows two types of non-covalently bonded compounds. Solvent extractable material is mainly composed of the first type of compounds, which is predominantly aliphatic in nature with a preponderance of alkanes. The second type of compounds is more aromatic and they are probably located in the close porosity of this coal. They are not accessible to chloroform but they are the most abundant in the thermal extract.
publishDate 2003
dc.date.none.fl_str_mv 2003
2007
2007
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/2607
url http://hdl.handle.net/10261/2607
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 292130 bytes
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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