Probing multi-dynamics of crude oils by high field 2D NMR DOSY and relaxometry

Louis‐Joseph, Alain; Benamsili, Lyès; Korb, Jean-Pierre

doi:10.1016/j.micromeso.2013.02.037

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…For crude oil having asphaltene and confined into the rock sample, the NMR distribution portrait is approximately closer to that of bulk excluding the boosting in the absolute value of the portrait. The work conducted by Louis-Joseph et al develops further the arguments of Zielinski et al…”

Section: Application Of Nmr Spectrocopy On Asphaltenesmentioning

confidence: 73%

“…There are important contributions on the effect of asphaltene presence in probing dynamics of crude oils in bulk and confined states. − Louis-Joseph et al have applied 2D DOSY NMR and NMR relaxometry for analyzing crude oil supplied by Total (EP, France). They have studied four samples: original crude oil sample having 9 wt % asphaltene, maltenes probe without asphaltene, the original sample confined into a porous sandstone rock, and the fourth probe prepared by mixing the original sample and the second one without asphaltene.…”

Section: Application Of Nmr Spectrocopy On Asphaltenesmentioning

confidence: 99%

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NMR Spectroscopy Analysis of Asphaltenes

Mal

2019

Energy Fuels

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In crude oil production and processing, asphaltene aggregation followed by precipitation is a major problem for the oil industry as it causes deactivation of catalysts, blocking pipelines, and deposition on the internal surface of the reservoirs, etc. Asphaltenes, a complex mixture of a broad distribution of molecules, consisting of aromatic cores bonded to aliphatics and porphyrin type molecules with heavy metals, are defined based on solubility. Molecular complexity along with varying molecular weight distribution makes asphaltenes a difficult scientific problem to characterize. Over several decades, many researchers have contributed to characterization, analysis, and determination of structural properties of asphaltenes by various analytical techniques. Nuclear magnetic resonance (NMR) spectroscopy and relaxometry are widely applied for characterizing the chemical structures of asphaltenes, interactions between asphaltenes and maltenes, and dynamical behaviors of asphaltenes in bulk and in confined states. The goal of the current review article is to give an insight into various aspects of asphaltene analysis by NMR spectroscopy and relaxometry. Following a short introduction on asphaltenes and theory of NMR technique, recent contributions on asphaltenes by NMR techniques are summarized and presented. Lessons learned and suggestions on possible future work conclude the present review article.

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Section: Application Of Nmr Spectrocopy On Asphaltenesmentioning

confidence: 73%

Section: Application Of Nmr Spectrocopy On Asphaltenesmentioning

confidence: 99%

NMR Spectroscopy Analysis of Asphaltenes

Mal

2019

Energy Fuels

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“…However, it does not require any particular sample preparation and maintains the original chemical environment of the sample during analysis. It has been used for not only petroleum fraction characterization and to study asphaltene aggregation phenomena ,− but also crude oil sample analysis. − …”

Section: Resultsmentioning

confidence: 99%

Diffusion-Ordered Spectroscopy Nuclear Magnetic Resonance as an Alternative Technique to Improve Asphaltene Characterization

et al. 2018

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An asphaltene sample from a light Arabian crude oil was characterized using several analytical techniques, such as thermogravimetric analysis, nuclear magnetic resonance, Fourier transform infrared spectroscopy, and elemental analysis. The results showed that the sample has a high sulfur content and highly condensed aromatic compounds and the average molecular structure is predominantly of continental/island type; however, the presence of a significant amount of methylene carbons in long alkyl chains is clear. A diffusion-ordered spectroscopy nuclear magnetic resonance experiment (DOSY-NMR) was carried out to detect the presence of asphaltene aggregates, evaluate their size, and shed light on the presence of maltenic occluded species and entrained residual solvent. In the DOSY spectrum, some sample signals were attributed to non-asphaltenic molecules, showing that it is possible to achieve key features of the sample complexity in “one shot”.

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NMR T1 dispersion of crude oils from 10 kHz to 20 MHz

Tromp

Pel

2021

Journal of Magnetic Resonance

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Probing multi-dynamics of crude oils by high field 2D NMR DOSY and relaxometry

Cited by 4 publications

References 6 publications

NMR Spectroscopy Analysis of Asphaltenes

NMR Spectroscopy Analysis of Asphaltenes

Diffusion-Ordered Spectroscopy Nuclear Magnetic Resonance as an Alternative Technique to Improve Asphaltene Characterization

NMR T1 dispersion of crude oils from 10 kHz to 20 MHz

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