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Contribution of mass spectrometry in assessing quality of petroleum fractions: The use of mass spectrometry for assessing asphaltenes.

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Title: Contribution of mass spectrometry in assessing quality of petroleum fractions: The use of mass spectrometry for assessing asphaltenes.
Authors: Pantoja, Patricia Araujo1 pattyuni@yahoo.es, Mendes, Maria Anita1,2, Nascimento, Claudio Augusto Oller1,2
Source: Journal of Petroleum Science & Engineering. Sep2013, Vol. 109, p198-205. 8p.
Subjects: Petroleum analysis, Asphaltene analysis, Mass spectrometry, Matrix-assisted laser desorption-ionization, Petroleum refineries, Precipitation (Chemistry), Heptane
Geographic Terms: Brazil
Abstract: Abstract: This study presents the results of an analysis of crude oil and asphaltene samples using the MALDI TOF technique. Thirty crude petroleum samples (24.53–32.05 API gravity) obtained from a Brazilian refinery were used in this study. Asphaltenes were precipitated from the corresponding crude oil samples with n-heptane. Mass spectra were acquired with a MALDI TOF mass spectrometer in a mass range of 100–1000Da. The main purpose of this study was to analyze the composition of the asphaltene molecules extracted from oil samples according to their molecular composition (molecular weight and composition heteroatoms). The mean composition of the group analyzed was calculated as follows: 17% sulfur-containing molecules, 28% nitrogen-containing molecules, 19% oxygen-containing molecules, 12% sulfur–oxygen-containing molecules and 17% nitrogen–oxygen containing molecules; only 7% of the compounds contained only hydrogen and carbon in their composition. Finally, MALDI TOF analysis can be a very efficient process with a great potential for estimating the physicochemical properties of asphaltenes. A VBA (Visual Basic for Applications) algorithm allowed us to determine the elemental composition of components of asphaltene samples. The elemental composition showed that, despite having the same physical characteristics, the chemical composition of the samples was different. [Copyright &y& Elsevier]
Copyright of Journal of Petroleum Science & Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 92874014
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Contribution of mass spectrometry in assessing quality of petroleum fractions: The use of mass spectrometry for assessing asphaltenes.
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  Data: <searchLink fieldCode="AR" term="%22Pantoja%2C+Patricia+Araujo%22">Pantoja, Patricia Araujo</searchLink><relatesTo>1</relatesTo><i> pattyuni@yahoo.es</i><br /><searchLink fieldCode="AR" term="%22Mendes%2C+Maria+Anita%22">Mendes, Maria Anita</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Nascimento%2C+Claudio+Augusto+Oller%22">Nascimento, Claudio Augusto Oller</searchLink><relatesTo>1,2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Petroleum+Science+%26+Engineering%22">Journal of Petroleum Science & Engineering</searchLink>. Sep2013, Vol. 109, p198-205. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Petroleum+analysis%22">Petroleum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Asphaltene+analysis%22">Asphaltene analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+spectrometry%22">Mass spectrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Matrix-assisted+laser+desorption-ionization%22">Matrix-assisted laser desorption-ionization</searchLink><br /><searchLink fieldCode="DE" term="%22Petroleum+refineries%22">Petroleum refineries</searchLink><br /><searchLink fieldCode="DE" term="%22Precipitation+%28Chemistry%29%22">Precipitation (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Heptane%22">Heptane</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Brazil%22">Brazil</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: This study presents the results of an analysis of crude oil and asphaltene samples using the MALDI TOF technique. Thirty crude petroleum samples (24.53–32.05 API gravity) obtained from a Brazilian refinery were used in this study. Asphaltenes were precipitated from the corresponding crude oil samples with n-heptane. Mass spectra were acquired with a MALDI TOF mass spectrometer in a mass range of 100–1000Da. The main purpose of this study was to analyze the composition of the asphaltene molecules extracted from oil samples according to their molecular composition (molecular weight and composition heteroatoms). The mean composition of the group analyzed was calculated as follows: 17% sulfur-containing molecules, 28% nitrogen-containing molecules, 19% oxygen-containing molecules, 12% sulfur–oxygen-containing molecules and 17% nitrogen–oxygen containing molecules; only 7% of the compounds contained only hydrogen and carbon in their composition. Finally, MALDI TOF analysis can be a very efficient process with a great potential for estimating the physicochemical properties of asphaltenes. A VBA (Visual Basic for Applications) algorithm allowed us to determine the elemental composition of components of asphaltene samples. The elemental composition showed that, despite having the same physical characteristics, the chemical composition of the samples was different. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Petroleum Science & Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.petrol.2013.08.008
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 198
    Subjects:
      – SubjectFull: Petroleum analysis
        Type: general
      – SubjectFull: Asphaltene analysis
        Type: general
      – SubjectFull: Mass spectrometry
        Type: general
      – SubjectFull: Matrix-assisted laser desorption-ionization
        Type: general
      – SubjectFull: Petroleum refineries
        Type: general
      – SubjectFull: Precipitation (Chemistry)
        Type: general
      – SubjectFull: Heptane
        Type: general
      – SubjectFull: Brazil
        Type: general
    Titles:
      – TitleFull: Contribution of mass spectrometry in assessing quality of petroleum fractions: The use of mass spectrometry for assessing asphaltenes.
        Type: main
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            NameFull: Pantoja, Patricia Araujo
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            NameFull: Mendes, Maria Anita
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            NameFull: Nascimento, Claudio Augusto Oller
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          Dates:
            – D: 01
              M: 09
              Text: Sep2013
              Type: published
              Y: 2013
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              Value: 109
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