Impact of Wash Oil Composition on Degradation: A Comparative Analysis of “Light” and “Heavy” Oils

Denis Miroshnichenko (), Artem Bannikov, Leonid Bannikov, Olexandr Borisenko, Andrei Shishkin, Pavels Gavrilovs and Volodymyr Tertychnyi
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Denis Miroshnichenko: Department of Solid Fuel and Gas Processing Technology and Oil Refining Technology, National Technical University “Kharkiv Polytechnic Institute”, Kyrpychova 2, 61002 Kharkiv, Ukraine
Artem Bannikov: Department of Solid Fuel and Gas Processing Technology and Oil Refining Technology, National Technical University “Kharkiv Polytechnic Institute”, Kyrpychova 2, 61002 Kharkiv, Ukraine
Leonid Bannikov: State Enterprise Ukrainian State Scientific Research Institute of Coal Chemistry (SE UKHIN), Vesnina 7, 61023 Kharkiv, Ukraine
Olexandr Borisenko: State Enterprise Ukrainian State Scientific Research Institute of Coal Chemistry (SE UKHIN), Vesnina 7, 61023 Kharkiv, Ukraine
Andrei Shishkin: Faculty of Natural Sciences and Technology, Institute of Materials and Surface Engineering, Riga Technical University, 7 P. Valdena, LV-1048 Riga, Latvia
Pavels Gavrilovs: Faculty of Natural Sciences and Technology, Institute of Materials and Surface Engineering, Riga Technical University, 7 P. Valdena, LV-1048 Riga, Latvia
Volodymyr Tertychnyi: Department of Solid Fuel and Gas Processing Technology and Oil Refining Technology, National Technical University “Kharkiv Polytechnic Institute”, Kyrpychova 2, 61002 Kharkiv, Ukraine

Resources, 2024, vol. 14, issue 1, 1-16

Abstract: This study aims to address the limited understanding of wash oil degradation in benzene units by analysing changes in the composition and properties of fresh and operating oils from different manufacturers. The findings will provide insights into the degradation pathways and stability of these oils. Gas chromatography/mass spectrometry was used to analyse the provided samples, and the dynamic viscosity of the oils was determined using a Brookfield LV DV2T rotational viscometer. During operation, the “heavy” oil (HO) becomes less volatile, while the ”light” oil (LO) becomes slightly more volatile. The viscosity of the HO increases 1.25 times during operation. The LO is characterised by a higher total concentration of alkyl derivatives (48 wt.% compared to 44 wt.% for the HO). LO is enriched with naphthalene and indene, while HO loses 1- and 2-methylnaphthalenes and shows an increase in the concentrations of dibenzofuran, fluorene, anthracene, and phenanthrene. The oxidation products of LO include oxidised alkyl groups, while HO shows oxidised non-substituted hydrocarbons. The practical value of such studies lies in guiding the selection of fresh oil under current operating conditions. LO is more resistant to degradation as an absorbent than heavier wash oil.

Keywords: wash oil; gas chromatography/mass spectrometry; viscosity; aromatic hydrocarbons (search for similar items in EconPapers)
JEL-codes: Q1 Q2 Q3 Q4 Q5 (search for similar items in EconPapers)
Date: 2024
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