Resin–Paraffin Aggregation Processes in Waxy Oil Revealed by Vanadyl Porphyrin Spin Probe | Sciact - CRIS-system of Boreskov Institute of Catalysis

Resin–Paraffin Aggregation Processes in Waxy Oil Revealed by Vanadyl Porphyrin Spin Probe Full article

Journal

Energy and Fuels
ISSN: 0887-0624 , E-ISSN: 1520-5029

Output data

Year: 2023, Volume: 37, Number: 16, Pages: 11797–11806 Pages count : 10 DOI: 10.1021/acs.energyfuels.3c01707

Tags

Aromatic compounds, Electron paramagnetic resonance spectroscopy, Hydrocarbons, Lipids, Quantum mechanics

Authors

Trukhan Sergey N. ^1,2 , Morozov Evgeny V. ^2,3 , Martyanov Oleg N. ¹

Affiliations

1	Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
2	Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk 660036, Russia
3	Institute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk 660036, Russia

Funding (1)

Russian Science Foundation

21-13-00171 (121060300118-3)

The work demonstrates the great potential of using a vanadyl porphyrin probe to study resin–paraffin aggregation processes in oils. The dynamics and polarity of the local environment of vanadyl octaethylporphine (VOOEP), used as a spin probe, specially introduced into oil with a high content of paraffins and resins, have been studied. It has been found that VOOEP does not enter into paraffin crystallites even at temperatures 25 K below the wax appearance temperature but forms aggregates composed of resin molecules that can be adsorbed onto the surface of paraffins. The proposed approach to the precise simulation of experimental ESR spectra based on the Monte Carlo method in the temperature range in which partial averaging of anisotropic interactions is observed showed that as the temperature decreases from 320 to 200 K, the fraction of aggregates that capture the spin probe increases from 10 to 80%. It has been found that the incorporation of VOOEP into the aggregates is accompanied by an increase in the polarity of the local environment of the spin probe, which is consistent with the proposed mechanism of resin–paraffin aggregation processes in waxy oils.

Trukhan S.N. , Morozov E.V. , Martyanov O.N.
Resin–Paraffin Aggregation Processes in Waxy Oil Revealed by Vanadyl Porphyrin Spin Probe
Energy and Fuels. 2023. V.37. N16. P.11797–11806. DOI: 10.1021/acs.energyfuels.3c01707 WOS Scopus РИНЦ AN OpenAlex

Submitted:	May 17, 2023
Accepted:	Jul 17, 2023
Published online:	Aug 2, 2023
Published print:	Aug 17, 2023

Web of science:	WOS:001039807100001
Scopus:	2-s2.0-85168461692
Elibrary:	54369229
Chemical Abstracts:	2023:1591792
OpenAlex:	W4385481042

DB	Citing
Web of science	4
OpenAlex	5
Scopus	4
Elibrary	3