Role of Vanadylporphyrins in the Flocculation and
Sedimentation of Asphaltenes of Heavy Oils with High Vanadium Content

Borisova, Yulia Yurevna; Tazeeva, Elvira Gabidullovna; Mironov, Nikolay Alexandrovich; Borisov, Dmitry Nikolaevich; Yakubova, Svetlana Gabidullinovna; Abilova, Guzalia Rashidovna; Sinyashin, Kirill Olegovich; Yakubov, Makhmut Renatovich

doi:10.1021/acs.energyfuels.7b02544.s001

ef7b02544_si_001.pdf (146.51 kB)

Role of Vanadylporphyrins in the Flocculation and Sedimentation of Asphaltenes of Heavy Oils with High Vanadium Content

journal contribution

posted on 2017-11-07, 00:00 authored by Yulia Yurevna Borisova, Elvira Gabidullovna Tazeeva, Nikolay Alexandrovich Mironov, Dmitry Nikolaevich Borisov, Svetlana Gabidullinovna Yakubova, Guzalia Rashidovna Abilova, Kirill Olegovich Sinyashin, Makhmut Renatovich Yakubov

Extraction by N,N-dimethylformamide with further column chromatography allowed obtaining concentrate of vanadylporphyrins from asphaltenes of heavy sulfurous oils with high vanadium content. The prevailing types of vanadylporphyrins, their ratio, and molecular mass distribution were determined. The influence of obtained vanadylporphyrin concentrates on the stability of asphaltenes in the system “solvent/precipitator” was investigated. Kinetic studies using UV–vis spectroscopy have revealed that an increase in the content of vanadylporphyrins in asphaltenes leads to acceleration of their deposition from solution and destabilization of colloidal systems.