Thermal analysis and combustion kinetic of heavy oils and their asphaltene and maltene fractions using accelerating rate calorimetry

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dc.contributor.authorRonaldo Santos
dc.contributor.authorVIDAL, V. J. A.
dc.contributor.authorTREVISAN. O. V.
dc.date.accessioned2022-01-12T22:00:23Z
dc.date.available2022-01-12T22:00:23Z
dc.date.issued2014-11-05
dc.description.abstract© 2014 American Chemical Society.This work presents an experimental study on the thermal and kinetic parameters of the oxidation reaction of heavy crude oils to support the in-situ combustion oil recovery technique. An accelerated rate calorimeter was used to investigate the thermal behavior of two Brazilian heavy oils in an open system under constant pressure and continuous heating to 550 °C. The goal was to identify and characterize several oxidation regions and to obtain the activation energy and reaction order. The temperature-time curves showed three clearly distinct regions. During the heating, autoignition was found to have started at 180-220 °C. Then, the reaction curves exhibit a strong exothermic behavior up to 250-350 °C, which represents the low-temperature oxidation. Asphaltenes were found to play a crucial role in the kinetic behavior of the crude oils. The results show that oxygen-addition reactions are dominant from 200 to 300 °C and that bond-scission reactions are dominant above 350 °C. Although the presence of sand and clay improves the contact between the oil and oxygen and accelerates both of these reactions, it has a greater impact on the oxygen-addition reactions. The results provide helpful data for the screening of crude oils as candidates for recovery by in-situ combustion.
dc.description.firstpage7140
dc.description.issuenumber11
dc.description.lastpage7148
dc.description.volume28
dc.identifier.citationDOS SANTOS, R. G.; VIDAL, V. J. A.; TREVISAN. O. V. Thermal analysis and combustion kinetic of heavy oils and their asphaltene and maltene fractions using accelerating rate calorimetry. Energy and Fuels, v. 28, n. 11, p. 7140-7148, nov. 2014.
dc.identifier.doi10.1021/ef5007353
dc.identifier.issn1520-5029
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/3996
dc.relation.ispartofEnergy and Fuels
dc.rightsAcesso Restrito
dc.titleThermal analysis and combustion kinetic of heavy oils and their asphaltene and maltene fractions using accelerating rate calorimetry
dc.typeArtigo
fei.scopus.citations36
fei.scopus.eid2-s2.0-84912059420
fei.scopus.subjectAccelerated rate calorimeters
fei.scopus.subjectAccelerating rate calorimetry
fei.scopus.subjectCombustion kinetics
fei.scopus.subjectContinuous heating
fei.scopus.subjectExothermic behavior
fei.scopus.subjectLow-temperature oxidation
fei.scopus.subjectOxidation reactions
fei.scopus.subjectTemperature-time curves
fei.scopus.updated2023-10-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84912059420&origin=inward
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