Destruction processes of oil films of emulsion environment

• Autorzy: Klimov R. A. , Pavlenko A. M.
• Języki publikacji: EN

Abstrakty

EN

Most of the methods aimed at studying the dynamics of growth of vapor bubbles which occur either in the liquid volume or on a superheated surface [1-3]. A peculiarity of emulsion media boiling is that the formation of a vapor phase occurs on the surface of liquid interface if one liquid (for example, oil) is a superficially active substance or in the emulsion there is a superficially active substance (in multicomponent emulsions), which is based on a decrease in the interfacial tension at the interface between the dispersive medium (water) and the dispersion phase (oil) [1, 3-6]. Experimental data [1, 3] indicate that the process of a new phase (vapor) formation is initiated by an internal thermal impact on the surface of the oil particles. Thus, for example, with a sudden pressure decay, the preheated emulsion will be in the supersaturation state of the thermolabile-water phase (the water is superheated against the saturation temperature at a given pressure), i.e. it will contain an excessive amount of heat [7-10]. This heat excess is expended on the work of vapor layer formation and further vaporization. The effect of oil films is ambiguous: on the one hand, when heated, they play the role of thermal resistance, thus, slowing down the heating process; on the other hand, they are the heat carriers which can be used for the formation and growth of the vapor phase and also they are superficially active substance, which contributes to achieving lower water supersaturation temperatures, i.e. early boiling [5]. The consideration of oil thermal effect plays an important role when regarding heat and mass transfer processes during the boiling of emulsion media. Theoretical description and analysis of heat and mass exchange processes in emulsions, associated with the presence of oil and oil films, allows us to study more in detail the process itself, as well as to offer optimal parameters and characteristics for the processes of obtaining and processing a fine emulsion.

Słowa kluczowe

EN

emulsion; oil film; boiling; thermophysical process

• Wydawca: Kielce University of Technology
• Czasopismo: Journal of New Technologies in Environmental Science
• Rocznik: 2018
• Tom: Vol. 2, nr 2
• Strony: 75--83
• Opis fizyczny: Bibliogr. 11 poz. rys., wykr., wzory

Twórcy

autor

Klimov R. A.

• Dnieperovskii State University, Ukraine

autor

Pavlenko A. M.

• Kielce University of Technology, Poland

Bibliografia

• [1] Dolinsky A.A., Pavlenko A.M., Basok B.I.: Thermophysical processes in emulsions. - Kiev, Naukova Dumka, 2005. - 265 p. (In Russian).
• [2] Dolinsky A.A., Ivanitsky G.K.: Theoretical justification of the discrete-pulse energy input. 1. Model of the dynamics of a single vapor buble // Heat-process engineering. - 1995. - Volume 17. - No. 5. - PP. 3-29 (In Russian).
• [3] Pavlenko A.M., Basok B.I.: Laws of boiling of emulsified liquids. / Heat-process engineering. - 2004. - Volume 26. - No. 1. - PP. 21-25 (In Russian).
• [4] Pavlenko A.M., Klimov R.A.: Emulsion boiling features in adiabatic processes // Collection of scientific works of DSTU. - Dneprodzerzhinsk, 2007. - PP. 53-58 (In Russian).
• [5] Pavlenko A.M., Klіmov R.O., Basok B.І.: The development of hydrothermic homogenizing methods / Heat-process engineering. - 2005. - Volume 27. - No. 4. - PP. 64-71 (In Ukrainian).
• [6] Pavlenko A.M., Klimov R.A.: Dynamics of phase transitions in emulsions // System technologies. - 2006. - No. 4 (45). - PP. 40-45 (In Russian).
• [7] Tolubinsky V.I.: Heat transfer during boiling. - Kiev, Publishing house: Naukova Dumka, 1980. - 316 p.
• [8] Dolinsky A.A., Basok B.I.: Discrete-impulse energy transformation in an adiabatically boiling stream. / Heat-process engineering. - 2001. - Volume 23. - No. 4-5. - PP. 5-20 (In Russian).
• [9] Dolinsky A.A., Basok B.I., Nakorchevsky A.I.: Adiabatically boiling flows. - Kiev, Publishing house: Naukova Dumka, 2001. - 208 p. (In Russian).
• [10] Ivanitsky G.K.: Destruction of emulsion droplets in adiabatically boiling flows. / Heat-process engineering. - 1999. - Volume. 21. - No. 4-5. - PP. 10-15 (In Russian).
• [11] Reed R., Prausnitz J., Sherwood T.: Properties of gases and liquids: Reference book. - Leningrad: Khimiya, 1982. - 592 p.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).