Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/320046
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.identifier.isbn1520-5029pt
dc.typeArtigopt_BR
dc.titleRole of asphaltenes and additives on the viscosity and microscopic structure of heavy crude oilspt_BR
dc.contributor.authorPadula, Lilianpt_BR
dc.contributor.authorBalestrin, Lia Beraldo da Silveirapt_BR
dc.contributor.authorRocha, Nelson de Oliveirapt_BR
dc.contributor.authorCarvalho, Carlos Henrique Monteiro dept_BR
dc.contributor.authorWestfahl Jr., Harrypt_BR
dc.contributor.authorCardoso, Mateus Borbapt_BR
dc.contributor.authorSabadini, Edvaldopt_BR
dc.contributor.authorLoh, Watsonpt_BR
unicamp.author.emailwloh@iqm.unicamp.brpt_BR
dc.subjectÓleo pesadopt_BR
dc.subjectÓleo crupt_BR
dc.subjectAsfaltenospt_BR
dc.subjectReologiapt_BR
dc.subjectSAXSpt_BR
dc.subject.otherlanguageHeavy oilpt_BR
dc.subject.otherlanguageCrude oilpt_BR
dc.subject.otherlanguageAsphaltenespt_BR
dc.subject.otherlanguageRheologypt_BR
dc.subject.otherlanguageSAXSpt_BR
dc.description.abstractAn attempt to understand the microscopic origin of the high viscosity of Brazilian heavy crude oils was made combining macroscopic (theological measurements) and microscopic [small-angle X-ray scattering (SAXS) measurements] techniques. A clear relationship between the asphaltene content and viscosity was found, while the removal of asphaltene via flocculation led to a large viscosity drop, confirming them as the origin of high viscosity. The SAXS analyses of crude oils confirmed the presence of asphaltene aggregates as fractal-like particles of colloidal dimensions. Afterward, a systematic investigation was performed on the effects of a series of additives and physical treatments on the crude oil viscosity. Physical methods did not cause any significant viscosity drop as well as more than 80 additives tested. SAXS measurements on oil samples containing toluene and heptane indicated little effect on the asphaltene nanoaggregates within the dimensions probed by SAXS, confirming a general mode of action based on aggregate dilution instead of disruption.en
dc.description.abstractAn attempt to understand the microscopic origin of the high viscosity of Brazilian heavy crude oils was made combining macroscopic (rheological measurements) and microscopic [small-angle X-ray scattering (SAXS) measurements] techniques. A clear relationshpt_BR
dc.relation.ispartofEnergy and fuelspt_BR
dc.publisher.cityWashington, DCpt_BR
dc.publisher.countryEstados Unidospt_BR
dc.publisherAmerican Chemical Societypt_BR
dc.date.issued2016pt_BR
dc.date.monthofcirculationJan.pt_BR
dc.identifier.citationEnergy & Fuels. AMER CHEMICAL SOC, n. 30, n. 5, p. 3644 - 3651.pt_BR
dc.language.isoengpt_BR
dc.description.volume30pt_BR
dc.description.issuenumber5pt_BR
dc.description.firstpage3644pt_BR
dc.description.lastpage3651pt_BR
dc.rightsfechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0887-0624pt_BR
dc.identifier.eissn1520-5029pt_BR
dc.identifier.wosidWOS:000376417600010pt_BR
dc.identifier.doi10.1021/acs.energyfuels.5b02103pt_BR
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/acs.energyfuels.5b02103pt_BR
dc.date.available2016-12-06T18:30:30Z-
dc.date.accessioned2016-12-06T18:30:30Z-
dc.description.provenanceMade available in DSpace on 2016-12-06T18:30:30Z (GMT). No. of bitstreams: 1 000376417600010.pdf: 1093147 bytes, checksum: 569e49e9706d958f2a94a0e4af5120d7 (MD5) Previous issue date: 2016 Bitstreams deleted on 2021-01-06T12:26:41Z: 000376417600010.pdf,. Added 1 bitstream(s) on 2021-01-06T12:27:10Z : No. of bitstreams: 1 000376417600010.pdf: 1174477 bytes, checksum: a07ed48e2f65da151759a051980fd71a (MD5)en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/320046-
dc.description.conferencenome16th International Conference on Petroleum Phase Behavior and Fouling (PetroPhase)pt_BR
dc.description.conferencedateJUN 07-11, 2015pt_BR
dc.description.conferencelocationPlaya del Carmen, MEXICOpt_BR
dc.type.formArtigopt_BR
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