LAPSE:2020.1270
Published Article
LAPSE:2020.1270
Qualitative and Quantitative Analysis of Heavy Crude Oil Samples and Their SARA Fractions with 13C Nuclear Magnetic Resonance
Ilfat Rakhmatullin, Sergey Efimov, Vladimir Tyurin, Marat Gafurov, Ameen Al-Muntaser, Mikhail Varfolomeev, Vladimir Klochkov
December 22, 2020
Nuclear magnetic resonance (NMR) approaches have unique advantages in the analysis of crude oil because they are non-destructive and provide information on chemical functional groups. Nevertheless, the correctness and effectiveness of NMR techniques for determining saturates, aromatics, resins, and asphaltenes (SARA analysis) without oil fractioning are still not clear. In this work we compared the measurements and analysis of high-resolution 13C NMR spectra in B0 ≈ 16.5 T (NMR frequency of 175 MHz) with the results of SARA fractioning for four various heavy oil samples with viscosities ranging from 100 to 50,000 mPa·s. The presence of all major hydrocarbon components both in crude oil and in each of its fractions was established quantitatively using NMR spectroscopy. Contribution of SARA fractions in the aliphatic (10−60 ppm) and aromatic (110−160 ppm) areas of the 13C NMR spectra were identified. Quantitative fractions of aromatic molecules and oil functional groups were determined. Aromaticity factor and the mean length of the hydrocarbon chain were estimated. The obtained results show the feasibility of 13C NMR spectroscopy for the express analysis of oil from physical properties to the composition of functional groups to follow oil treatment processes.
Keywords
13C NMR spectroscopy, aromaticity, crude oil, oil fraction, quantitative composition, SARA
Subject
Suggested Citation
Rakhmatullin I, Efimov S, Tyurin V, Gafurov M, Al-Muntaser A, Varfolomeev M, Klochkov V. Qualitative and Quantitative Analysis of Heavy Crude Oil Samples and Their SARA Fractions with 13C Nuclear Magnetic Resonance. (2020). LAPSE:2020.1270
Author Affiliations
Rakhmatullin I: Institute of Physics, Kazan Federal University, 18 Kremlevskaya St., Kazan 420008, Russia; Department of Physical Chemistry, Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russia
Efimov S: Institute of Physics, Kazan Federal University, 18 Kremlevskaya St., Kazan 420008, Russia
Tyurin V: Institute of Physics, Kazan Federal University, 18 Kremlevskaya St., Kazan 420008, Russia
Gafurov M: Institute of Physics, Kazan Federal University, 18 Kremlevskaya St., Kazan 420008, Russia; Department of Physical Chemistry, Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russia [ORCID]
Al-Muntaser A: Department of Physical Chemistry, Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russia
Varfolomeev M: Department of Physical Chemistry, Butlerov Institute of Chemistry, Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russia [ORCID]
Klochkov V: Institute of Physics, Kazan Federal University, 18 Kremlevskaya St., Kazan 420008, Russia
Journal Name
Processes
Volume
8
Issue
8
Article Number
E995
Year
2020
Publication Date
2020-08-16
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr8080995, Publication Type: Journal Article
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LAPSE:2020.1270
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doi:10.3390/pr8080995
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Dec 22, 2020
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CC BY 4.0
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Dec 22, 2020
 
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Dec 22, 2020
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Calvin Tsay
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