Search academic texts

Information × Registration Number 0221U105192, 0121U109538 , R & D reports Title Hydrofillic and hydrofobic interactions in structured dispersed systems popup.stage_title Head Makarov Anatolii S., Доктор технічних наук Registration Date 14-06-2021 Organization A.V Dumansky Institute of Colloid Chemistry and Water Chemistry popup.description2   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 generati Product Description popup.authors Vygovska Irina Anatolyivna Dimitriyk Tetyana Mykolaivna Klishchenko Roman Evgeniyovich Konoval Olexandr Anatoliyovich Kosygina Irina Mikhailivna Kruchko Irina Mykolaivna Makarova Kateryna Viktorivna Mamchenko Olexiy Volodymirovoch Pakhar Tetyana Anatoliyvna Svetnenko Roman Sergiyovich Yakupova Irina Volodymirivna Yakupova Irina Volodymirivna popup.nrat_date 2021-06-14 Close