Registration Number
0220U101789,
0119U100050
, R & D reports
Title
Hydrofillic and hydrofobic interactions in structured dispersed systems
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Head
Mаkаrov Anаtoliy S., Доктор технічних наук
Registration Date
24-02-2020
Organization
A.V Dumansky Institute of Colloid Chemistry and Water Chemistry
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Object of study: oil-coal emulsions dispersed water-containing composites, coal of different brands, carbon nanomaterials, aliphatic alcohols, surfactants and dispersants. The purpose of the study is to study the effect of particle size distribution, surface properties of coal and carbon nanomaterials on sedimentation and aggregate stability, rheological behavior and electrokinetic properties of composite highly concentrated dispersions. Research methods - rheological, electrokinetic. The influence of the particle size distribution of the dispersed phase on the processes of formation of coagulation structures between coal particles is investigated. Studies have shown that the viscosity of the system decreases with increasing particle diameter. The rheological properties and stability of oil-coal emulsions can be adjusted by changing the particle size distribution of coal depending on the operational need. The processes of physicochemical interaction of particles of hydrophobic and hydrophilic materials with dispersion medium were studied and dispersed water-containing composites based on hydrophobic materials (pyrogenic silica and graphite) were able to accumulate up to 90 wt.% Of water in their composition. The introduction of graphite into the composite not only increases the volume fraction of water in it, but also by 3-10% reduces water loss during drying. It is established that the use of pre-plasma chemical conversion of organo-containing wastewater, which is used as a dispersion medium for composite water-coal fuel, allows improving the operational properties of fuel. Increased sedimentation stability and optimization of effective viscosity are achieved both by enhancing the electrostatic repulsion of suspension particles with increased ξ potential and by achieving a bimodal dispersion phase composition. Scope: Power generating installations, as a boiler oil substitute.
Product Description
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Vygovska Irina A.
Dymytriuk Tetiana M.
Klischenko Roman Ye.
Konoval Oleksandr A.
Kosyhina Iryna M.
Kruchko Iryna M.
Makarova Kateryna V.
Mamchenko Oleksii V.
Pakhar Tetiana A.
Svetnenko Roman S.
Yakupova Iryna V.
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2020-04-02
