Applications of Pulsed Electron Paramagnetic Resonance Spectroscopy to the Identification of Vanadyl Complexes in Asphaltene Molecules. Part 2: Hydrotreatment Monitoring

Applications of Pulsed Electron Paramagnetic Resonance Spectroscopy to the Identification of Vanadyl Complexes in Asphaltene Molecules. Part 2: Hydrotreatment Monitoring

The potential of electron paramagnetic resonance (EPR) spectroscopy to provide structural information on vanadyl species in asphaltene fractions was evaluated. The evolution of the chemical environment of vanadium during the fixed-bed hydrotreating process was studied. This study shows that asphalte...

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Veröffentlicht in:Energy & fuels 2017-03, Vol.31 (3), p.3288-3294
Hauptverfasser: Ben Tayeb, Karima, Delpoux, Olivier, Barbier, Jérémie, Chatron-Michaud, Pascal, Digne, Mathieu, Vezin, Hervé
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container_end_page 3294
container_issue 3
container_start_page 3288
container_title Energy & fuels
container_volume 31
creator Ben Tayeb, Karima
Delpoux, Olivier
Barbier, Jérémie
Chatron-Michaud, Pascal
Digne, Mathieu
Vezin, Hervé
description The potential of electron paramagnetic resonance (EPR) spectroscopy to provide structural information on vanadyl species in asphaltene fractions was evaluated. The evolution of the chemical environment of vanadium during the fixed-bed hydrotreating process was studied. This study shows that asphaltenes are composed of two types of environment: porphyrinic and non-porphyrinic structures. The hydroconversion process reduced by 40% the participation of non-porphyrinic species, while the porphyrinic complexes only diminished by 15%, which demonstrates that porphyrinic species are the most refractory to hydroconversion.
doi_str_mv 10.1021/acs.energyfuels.6b01526
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title Applications of Pulsed Electron Paramagnetic Resonance Spectroscopy to the Identification of Vanadyl Complexes in Asphaltene Molecules. Part 2: Hydrotreatment Monitoring
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