Influence of Processing Conditions on the Properties of High Paraffin Oil and Sediment Composition

• Published in: Solid fuel chemistry Vol. 58; no. 2; pp. 87 - 91
• Main Authors: Volkova, G. I., Zubarev, D. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.04.2024; Springer Nature B.V
• Subjects: Alkanes; Chemistry; Chemistry and Materials Science; Composition; Molecular weight; Molecular weight distribution; Physical Chemistry; Polymers; Rheological properties; Sediments; Ultrasonic processing; Viscometers; Viscosity; sediment composition; polymer additive; highly paraffinic oil; ultrasonic treatment; viscosity
• ISSN: 0361-5219; 1934-8029
• DOI: 10.3103/S0361521924020149

The influence of ultrasonic treatment, a polymer additive, and their combined effect on the structural and rheological properties of highly paraffinic, low-resin oil and the composition of separated sediments was studied. The oil was processed in an ultrasonic field (field intensity, 6 W/cm 2 ; frequency, 22 kHz; and time, 1–10 min). The sedimentation process was carried out at a medium temperature of 30°C and a cold rod temperature of 5°C. Viscosity–temperature parameters of oil were determined using a Brookfield DV-III ULTRA rotational viscometer. Ultrasonic treatment for 1 min and a polymer additive (0.05 wt %) led to a decrease in the viscosity by a factor of 5 and in pour point by 8°C. The introduction of the additive and the complex effect contributed to changes in the molecular weight distribution of n -alkanes in sediments: a shift of the second distribution maximum to the region of higher molecular weight components and an increase in the concentration of n -alkanes ΣC 17 H 36 –C 33 H 68 .