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CONTENT AND TYPES OF VANADYL PORPHYRINS IN ASPHALTENES AND RESINS OF HEAVY OILS FROM VARIOUS PRODUCTIVE COMPLEXES

Dmitry Milordov

First published: 2017-06-20https://doi.org/10.5593/sgem2017/11/s01.014View metrics

Abstract

Vanadium and nickel exist in oils as porphyrin complexes. Metalloporphyrins are concentrated in the asphaltene-resinous part of the oil, while the maximum content of vanadium and nickel is accounted for by asphaltenes. Up to the present time, information about features of content and distribution of vanadium, nickel, and the types of the corresponding metal complexes in asphaltenes and resins of heavy oils and natural bitumens has a disparate and non-systemic character. In this work, composition and distribution of vanadyl porphyrins in asphaltenes and resins are studied by the example of heavy oils from the Permian and the Carboniferous productive complexes of the deposits from Volga-Ural oil and gas basin. Isolation of vanadyl porphyrins from oil objects was carried out according to original methods. To concentrate vanadyl porphyrins from asphaltenes a precipitation extraction with a polar solvent was used; vanadyl porphyrins from resins were recovered on a chromatographic column. It was found that the content of vanadyl porphyrins in asphaltenes and resins from heavy oils of the Carboniferous productive complex significantly exceeds the content in the oils of the Permian productive complex. For mass-spectrometric studies obtained concentrates were subjected to additional chromatographic purification using sulfocathionite. Using MALDI TOF spectrometry, homologues of ETIO and DPEP of vanadyl porphyrins in asphaltenes and resins of heavy oil were identified, and their ratio was determined.

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Publication details

Title
CONTENT AND TYPES OF VANADYL PORPHYRINS IN ASPHALTENES AND RESINS OF HEAVY OILS FROM VARIOUS PRODUCTIVE COMPLEXES
Authors
Dmitry Milordov
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2017
Pages
109-116
SWS Citekey
Milordov20171109116
ISSN
1314-2704
ISBN
978-619-7105-98-8
Language
en
Publication type
Conference Paper
Keywords
heavy oilvanadyl porphyrinsasphaltenesresinsextraction.
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