Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy
Cerro Negro (CN) and Furrial asphaltenes have been analyzed using both liquid and solidstate 13C NMR spectroscopy. The spin-lattice relaxation times exhibited by the carbons in the resin containing CN asphaltene samples indicate that these carbons relax more slowly than the equivalent carbons in the...
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2015
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| Առցանց հասանելիություն: | http://hdl.handle.net/10872/11581 |
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| bitstream.checksum.fl_str_mv | 7c020282d630887ba819753d2e4a4c58 b9cf8c24047a85ea0a2211311e68fc11 |
| bitstream.checksumAlgorithm.fl_str_mv | MD5 MD5 |
| bitstream.url.fl_str_mv | https://saber.ucv.ve/jspui/bitstream/10872/11581/2/license.txt https://saber.ucv.ve/jspui/bitstream/10872/11581/1/pekerar1999.pdf |
| dc.contributor.author.none.fl_str_mv | Pekerar, Sara Lehmann, Teresa Méndez, Bernardo Acevedo, Sócrates |
| dc.creator.fl_str_mv | Pekerar, Sara Lehmann, Teresa Méndez, Bernardo Acevedo, Sócrates |
| dc.date.accessioned.none.fl_str_mv | 2015-07-21T19:21:20Z |
| dc.date.available.none.fl_str_mv | 2015-07-21T19:21:20Z |
| dc.date.issued.none.fl_str_mv | 2015-07-21 |
| dc.identifier.issn.none.fl_str_mv | 0887-0624 |
| dc.identifier.uri.none.fl_str_mv | http://hdl.handle.net/10872/11581 |
| dc.language.iso.es_VE.fl_str_mv | en |
| dc.title.es_VE.fl_str_mv | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| dc.type.es_VE.fl_str_mv | Article |
| description | Cerro Negro (CN) and Furrial asphaltenes have been analyzed using both liquid and solidstate 13C NMR spectroscopy. The spin-lattice relaxation times exhibited by the carbons in the resin containing CN asphaltene samples indicate that these carbons relax more slowly than the equivalent carbons in the resin-free samples. This fact suggests a higher mobility of the molecules in the sample in the presence of resins. CP/MAS experiments showed that, in general, all asphaltene samples have rigid alicyclic structures. This fact is consistent with the presence of condensed aliphatic rings. The results of the measurements of the cross-polarization relaxation times obtained from the variable contact-time CP/MAS experiments indicate that Cerro Negro samples are more “mobile” than Furrial. These findings point toward the presence of a larger number of CH2 chains bonding different ring clusters in the Cerro Negro samples. |
| id | SABERUCV_7fe1f2cd8d87f139048e9502dcb0b9fc |
| identifier_str_mv | 0887-0624 |
| language_invalid_str_mv | en |
| network_acronym_str | SABERUCV |
| network_name_str | Repositorio Institucional de la Universidad Central de Venezuela |
| oai_identifier_str | oai:saber.ucv.ve:10872/11581 |
| publishDate | 2015 |
| publishDateSort | 2015 |
| repository.mail.fl_str_mv | sfwrussians@gmail.com |
| repository.name.fl_str_mv | Saber UCV |
| repository_id_str | |
| spelling | Pekerar, SaraLehmann, TeresaMéndez, BernardoAcevedo, Sócrates2015-07-21T19:21:20Z2015-07-21T19:21:20Z2015-07-210887-0624http://hdl.handle.net/10872/11581Cerro Negro (CN) and Furrial asphaltenes have been analyzed using both liquid and solidstate 13C NMR spectroscopy. The spin-lattice relaxation times exhibited by the carbons in the resin containing CN asphaltene samples indicate that these carbons relax more slowly than the equivalent carbons in the resin-free samples. This fact suggests a higher mobility of the molecules in the sample in the presence of resins. CP/MAS experiments showed that, in general, all asphaltene samples have rigid alicyclic structures. This fact is consistent with the presence of condensed aliphatic rings. The results of the measurements of the cross-polarization relaxation times obtained from the variable contact-time CP/MAS experiments indicate that Cerro Negro samples are more “mobile” than Furrial. These findings point toward the presence of a larger number of CH2 chains bonding different ring clusters in the Cerro Negro samples.enMobility of Asphaltene Samples Studied by 13C NMR SpectroscopyArticleLICENSElicense.txtlicense.txttext/plain; charset=utf-81509https://saber.ucv.ve/jspui/bitstream/10872/11581/2/license.txt7c020282d630887ba819753d2e4a4c58MD52ORIGINALpekerar1999.pdfpekerar1999.pdfapplication/pdf85757https://saber.ucv.ve/jspui/bitstream/10872/11581/1/pekerar1999.pdfb9cf8c24047a85ea0a2211311e68fc11MD5110872/11581oai:saber.ucv.ve:10872/115812017-03-13 14:49:39.959Saber UCVsfwrussians@gmail.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 |
| spellingShingle | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| title | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| title_full | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| title_fullStr | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| title_full_unstemmed | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| title_short | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| title_sort | Mobility of Asphaltene Samples Studied by 13C NMR Spectroscopy |
| url | http://hdl.handle.net/10872/11581 |