Title :

Applications of Pulsed Electron Paramagnetic Resonance Spectroscopy to the Identification of Vanadyl Complexes in Asphaltene Molecules. Part 1: Influence of the Origin of the Feed

Author(s) :

Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Delpoux, Olivier [Auteur]
IFP Energies nouvelles [IFPEN]
Barbier, Jérémie [Auteur]
IFP Energies nouvelles [IFPEN]
Marques, Joao [Auteur]
IFP Energies nouvelles [IFPEN]
Verstraete, Jan [Auteur]
IFP Energies nouvelles [IFPEN]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Journal title :

Energy & Fuels

Abbreviated title :

Energy Fuels

Volume number :

29

Pages :

4608-4615

Publisher :

American Chemical Society (ACS)

Publication date :

2015-06-25

ISSN :

1520-5029

English keyword(s) :

Hydrocarbons
Electron paramagnetic resonance spectroscopy
Vanadium
Nitrogen
Aromatic compounds

HAL domain(s) :

Chimie/Chimie théorique et/ou physique

English abstract : [en]

The most abundant metals in heavy feedstocks, vanadium and nickel, are mainly concentrated in the asphaltene fraction, a petroleum fraction that precipitates in the presence of paraffinic solvents. Characterization of ...
Show more >The most abundant metals in heavy feedstocks, vanadium and nickel, are mainly concentrated in the asphaltene fraction, a petroleum fraction that precipitates in the presence of paraffinic solvents. Characterization of vanadium and nickel complexes is therefore important to the development of demetalation and conversion strategies used to process heavy crude oils. The dependence of vanadyl structures upon the geographic origin of feedstocks and their evolution during hydroprocessing in an ebullated-bed pilot unit were studied. The aim of this contribution is to assess the possibilities of the electron paramagnetic resonance (EPR) spectroscopy to provide information on the structure of the vanadyl species. This work shows that pulsed EPR spectroscopy is a powerful technique that allows us to distinguish several types of environments of vanadium species, among which are porphyrinic ligands, even in very complex samples, such as C7 asphaltenes, from heavy feedstocks.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Research team(s) :

Propriétés magnéto structurales des matériaux (PMSM)

Submission date :

2021-06-17T13:47:46Z
2021-09-07T06:55:02Z
2021-09-10T10:29:08Z