INFLUENCE OF PHYSICAL PROPERTIES OF OIL ON THE EFFICIENCY OF DISPERSANT APPLICATION
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Kazanskiy nacional'nyy issledovatel'skiy tehnologicheskiy universitet
2.
Kazanskiy nacional'nyy issledovatel'skiy tehnologicheskiy universitet
3.
Kazan National Research Technological University
Kazan, Russian Federation
Kazan, Russian Federation
4.
KNITU
5.
KNITU
Type:
Article
Pages:
from 96
to 101
Status:
In work
Language:
Russian
Keywords:
DISPERSANT, OIL SPILL, OIL SPILL RESPONSE, OIL GROUP COMPOSITION, MESOSCALE MODELING
Abstract (English):
The use of dispersants to clean oil from the water surface is considered to be a physicochemical method of oil spill response. Their effectiveness depends on a wide range of conditions, including oil properties. Much of the scientific literature on dispersants states the direct influence of density and viscosity on dispersant success. However, these characteristics depend on the group composition of the oil, namely the content of asphaltenes, resins and paraffins. This paper presents the results of studies on the dispersing ability of two dispersants (Corexit grade and an alkyl glucoside-based dispersing composition) on the dispersion efficiency of oils with different physical properties. The tests were conducted in two phases; during the first phase the Baffled Flask Test method (ASTM F3251-21) was used and during the second phase the mesoscale setup described in the authors' previous works was used. The studies show that the efficiency of the investigated dispersing compositions decreases linearly with increasing oil density and viscosity. This dependence is also confirmed by the results obtained on the experimental mesoscale unit. However, by analyzing the results with respect to the group composition, the revealed regularity becomes no longer obvious Thus, the dispersing efficiency of light oils can be explained by the highest content of resins and asphaltenes in them. The studied heavy oils, despite their high density, are characterized by low content of these components. The authors suggest that the role of the content of resinous asphaltene substances, which are natural emulsifiers, becomes less significant with increasing oil density. At the same time, this parameter determines the propensity to the dispersion process for light and medium oils with low density.
The use of dispersants to clean oil from the water surface is considered to be a physicochemical method of oil spill response. Their effectiveness depends on a wide range of conditions, including oil properties. Much of the scientific literature on dispersants states the direct influence of density and viscosity on dispersant success. However, these characteristics depend on the group composition of the oil, namely the content of asphaltenes, resins and paraffins. This paper presents the results of studies on the dispersing ability of two dispersants (Corexit grade and an alkyl glucoside-based dispersing composition) on the dispersion efficiency of oils with different physical properties. The tests were conducted in two phases; during the first phase the Baffled Flask Test method (ASTM F3251-21) was used and during the second phase the mesoscale setup described in the authors' previous works was used. The studies show that the efficiency of the investigated dispersing compositions decreases linearly with increasing oil density and viscosity. This dependence is also confirmed by the results obtained on the experimental mesoscale unit. However, by analyzing the results with respect to the group composition, the revealed regularity becomes no longer obvious Thus, the dispersing efficiency of light oils can be explained by the highest content of resins and asphaltenes in them. The studied heavy oils, despite their high density, are characterized by low content of these components. The authors suggest that the role of the content of resinous asphaltene substances, which are natural emulsifiers, becomes less significant with increasing oil density. At the same time, this parameter determines the propensity to the dispersion process for light and medium oils with low density.
Keywords:
DISPERSANT, OIL SPILL, OIL SPILL RESPONSE, OIL GROUP COMPOSITION, MESOSCALE MODELING
DISPERSANT, OIL SPILL, OIL SPILL RESPONSE, OIL GROUP COMPOSITION, MESOSCALE MODELING
