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1

Analysis of process of emulsions transport in hydrophilic/oleophilic granular porous media driven by capillary force

Shtyka O. S., Przybysz Ł., Błaszczyk M., Sęk J. P.

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2018

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nr 21(2)

85--101

EN

The research focuses on the issues concerning a process of multiphase liquids transport in granular porous media driven by the capillary pressure. The current publication is meant to introduce the results of experimental research conducted to evaluate the kinetics of the imbibition and emulsions behavior inside the porous structures. Moreover, the influence of the dispersed phase concentration and granular media structure on the mentioned process was considered. The medium imbibition with emulsifier-stabilized emulsions composed of oil as the dispersed phase in concentrations of 10 vol%, 30 vol%, and 50 vol%, was investigated. The porous media consisted of oleophilic/hydrophilic beads with a fraction of 200–300 and 600–800 μm. The experimental results provided that the emulsions imbibition in such media depended stronger on its structure compare to single-phase liquids. The increase of the dispersed phase concentration caused an insignificant mass decreasing of the imbibed emulsions and height of its penetration in a sorptive medium. The concentrations of the imbibed dispersions exceeded their initial values, but reduced with permeants front raise in the granular structures that can be defined as the influential factor for wicking process kinetics.

2

Transport of emulsions in granular porous media driven by capillary force

Shtyka O., Przybysz Ł., Sęk J.

Acta Innovations

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2018

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no. 26

38--44

EN

The transport of liquids driven by capillary suction-pressure and balanced by both viscous drag force and gravity acceleration is known as spontaneous imbibition. The prediction of spontaneous imbibition in porous media is of importance due to its relevance as a fundamental phenomenon in numerous industrial technologies as well as in nature. A vast majority of the experimental results and mathematical models concerning the imbibition process of single-phase liquids are considered and analyzed in the literature. The present research focuses on two-phase liquids transport in porous medium driven by capillary force. The penetrating liquids were surfactant-stabilized emulsions with the different dispersed phase concentrations. The discussed issues are the influence of porous bed composition and inner phase concentration on the height of an emulsion penetration, which allows to predict the velocity of imbibition process. From a practical point of view, the experimental results give the possibility to evaluate: productivity of granular sorbents applied to recover the environment, efficiency of building materials wetting with multiphase liquids, process of oil-derived pollutants migration in porous media, e.g. soil and other rock structures, etc.

3

Wpływ parametrów emulgowania na jakość produktu

Shtyka O., Błaszczyk M., Sęk J., Przybysz Ł.

Przemysł Chemiczny

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2017

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T. 96, nr 2

396--399

PL

Wytwarzanie emulsji powinno być tak zoptymalizowane, by przy zadanych parametrach emulgacji (czas, energia mieszania) uzyskać układy o określonych właściwościach. Szczególnie istotnym parametrem określającym jakość emulsji jest rozkład rozmiarów kropel wewnętrznej fazy emulsji oraz średnia średnica kropel reprezentująca ten rozkład. Dokonano analizy zależności pomiędzy rozkładem rozmiarów kropel fazy wewnętrznej emulsji typu olej w wodzie a ilością energii zużytej w procesie emulgowania. Na podstawie własnych rozważań teoretycznych oraz danych eksperymentalnych zaproponowano zależność modelową pozwalającą przewidzieć nakłady energetyczne konieczne do uzyskania emulsji o określonych właściwościach, udziale cieczy wewnętrznej i ciągłej oraz wymaganym średnim rozmiarze kropel oleju. Analizie poddano pięć emulsji o różnym stężeniu przy pięciu różnych czasach homogenizacji. Określono także zależność średniej średnicy kropel olejowych od czasu trwania tego procesu.

EN

Size distribution of com. vegetable oil droplets dispersed in aq. phase (oil content 5-40% by vol., stirring rate 12 000 rpm at 23°C, stirring time 10-180 s) was studied by optical microscopy (magnification ×40) coupled with digital camera. The increasing stirring time resulted in decreasing droplet size. The emulsions with higher oil concns. showed a larger diameter of the droplets.

4

Influence of emulsion inner phase concentration on permeability of deposit during flow through porous media

Przybysz Ł., Błaszczyk M., Sęk J.

Acta Innovations

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2017

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no. 23

25--34

EN

The issue of emulsion flow through porous media plays an important role in the development of land purification methods from various oily substances, as well as during the oil extraction process. The concentration of the emulsion dispersed phase exerts a strong influence on the rheological properties. The oil in water emulsions (O/W), that have a concentration of less than 0.5 (or 50%), show Newtonian behavior, and those with higher concentrations non-Newtonian. The flow of such systems through the structure of the porous medium is, therefore, also dependent on the variable rheological properties of the liquid. When the emulsion flows through the porous medium, a reduction of the relative permeability occurs. Due to that the transport may be very effectively limited, as the pores of deposit are being blocked by oil droplets. The paper presents studies on emulsion flow, with various concentrations, through a granular bed. It allowed to track changes in the permeability of the deposit over time. The results of experimental studies of transport and elution of highly concentrated emulsions from granular structures are also presented. This enabled tracking of changes in flow resistance of the emulsion through the porous bed in time. Moreover, the development of the mathematical model, which allows us to define the relationship between the bed blockage degree and the concentration of the emulsion internal phase could be the result of the experimental works. The results of such studies are very widely used in practice, among other things, in the issues of migration of pollutants, such as petroleum substances, in the soil layers. The development of knowledge in this field may contribute to the optimization of existing oil recovery techniques and methods of remediation of soil from organic substances.

5

Influence of granular bed parameters on emulsion flow and elution process of oil-in-water emulsion

Błaszczyk M., Pacholski P., Przybysz Ł., Sęk J.

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2016

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nr 19(4)

325--337

EN

Emulsion flow through porous structure is used in many processes in the field of chemical engineering. Good examples of practical applications are Enhanced Oil Recovery (EOR) techniques, soil remediation and treatment of oily wastewater. The emulsion transport in through porous media is not easy to describe, due to rheological behavior of emulsions and porous structure properties. In case of emulsified system flow through porous bed it is possible to observe the retention of oil on porous structure, and reduction of permeability of bed. In the presented study, we tried to investigate the influence of porous bed parameters on oil-in-water emulsion behavior during its flow and elution from porous structure. In experiments we used porous beds with varied particle size range and with different lengths. We measured pressure drop and related permeability changes in time. The turbidimetric and microscopic analysis that we conducted allowed us to check how concentration of emulsion changed during its flow and elution from porous structure.

6

Transport emulsji typu olej w wodzie przez struktury ziarniste

Błaszczyk M., Sęk J., Przybysz Ł.

Inżynieria i Aparatura Chemiczna

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2016

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Nr 1

8--9

PL

W pracy przedstawiono badania przepływów emulsji typu olej w wodzie przez złoża ziarniste oraz jej wymywania ze złoża za pomocą wody. Mierzono zmiany oporów przepływu podczas przemieszania się tych płynów przez media ziarniste oraz zmiany struktury emulsji wypływającej ze złoża w czasie trwania procesu i analizowano wpływ stężenia fazy wewnętrznej, stopnia granulacji złoża oraz jego długości. Stwierdzono stopniowy spadek przepuszczalności, czasową redukcję stężenia fazy olejowej oraz zmiany rozkładu rozmiarów kropel wypływającej ze złoża emulsji. Wyniki badań mogą przyczynić się do bardziej precyzyjnej oceny efektywności zarówno wtórnych metod wydobycia ropy jak i remediacji gleb.

EN

The paper presents studies of oil-in-water emulsions flow through granular media and the studies of elution of these liquids from the bed with the use of water. The changes in flow resistance during the movement of such fluids through granular media and changes in the structure of emulsion flowing out from the reservoir during the process were measured and the influence of internal phase concentration, degree of bed granulation and its length were analyzed. A gradual decrease in permeability, temporary reduction of oil phase concentration and changes in the distribution of droplets sizes in emulsion flowing out of the bed was recorded. The research results may contribute to more accurate evaluation of effectiveness of secondary oil recovery methods and soil remediation.

7

Rola zjawiska podczerwieni w procesie detekcji wycieków chłodniczych

Stęplewska U., Wróbel-Jędrzejewska M., Sender W., Ruleta P., Przybysz Ł.

Chłodnictwo : organ Naczelnej Organizacji Technicznej

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2012

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R. 47, nr 1-2

40-43

8

Opis procesu nasiąkania struktur porowatych za pomocą równania kinetycznego

Sęk J., Błaszczyk M., Przybysz Ł.

Inżynieria i Aparatura Chemiczna

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2010

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Nr 1

97-98

PL

Zaproponowano nowe równanie modelowe pozwalające na opis przebiegu procesu nasiąkania struktur porowatych. Wykorzystano postać zależności wykorzystywanej zazwyczaj do opisu kinetyki reakcji chemicznych. Dokonano jej modyfikacji wprowadzając koncepcję potencjału złoża porowatego czyli jego zdolności do pochłonięcia określonej ilości cieczy. Uwzględniono w rozważaniach teoretycznych fakt, że w praktyce, na skutek działania czynników zewnętrznych wartość tego potencjału nigdy nie jest w pełni wykorzystana. Przydatność proponowanego modelu potwierdzono na drodze eksperymentalnej. Wykazano, że pozwala on na opis przebiegu procesu nasiąkania z dokładnością rzędu dziesięciu procent w całym okresie jego trwania.

EN

A new modeling equation was proposed for the description of imbibition processes. The classical kinetic equation was modified using a concept of imbibitions potential, i.e. overall ability of porous structure of liquid sorption. It was also taken into account that in practice, due to side effects, this potential was never fully exploited. Applicability of the proposed model was confirmed on basis of experimental investigations. It was found that the data could be approximated with the accuracy of about ten percent in the whole range of sorption process.