Registration Number
0224U001706,
(0122U000179)
, R & D reports
Title
Investigation of the influence of physicochemical factors on the processes of structure formation in composite carbon-containing dispersed systems
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Вплив колоїдно-хімічних факторів на стабільність характеристики композиційних карбонвмісних дисперсних систем
Head
Makarov Anatolii S., д.т.н.
Registration Date
26-01-2024
Organization
National Academy of Sciences of Ukraine A.V.Dumansky Institute of Colloid Chemistry and Water Chemistry
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Investigation of the influence of physicochemical factors on the processes of structure formation in composite carbon-containing dispersed systems. Creation of liquid, concentrated, environmentally friendly fuel based on coal, modified micro- and nanocarbon structures with dispersion medium based on organ-containing wastewater of different composition and development of means to regulate its properties using dispersants, intensifiers, emulsifiers, stabilizers of mineral and organic origin
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The structural and mechanical properties of composite carbon-containing dispersed systems based on coal of various degrees of metamorphism and pyrocarbon in the presence of carbon-containing micro- and nanomaterials were investigated. The process of plasmochemical conversion of organics-containing wastewater and the formation of highly dispersed carbon was studied. It is shown that two types of carbon-containing degradation products are formed. The first type is a finely dispersed hydrophobic material, which is dominated by particles ranging in size from 1 to 5 microns, with particles of the order of hundreds of nanometers. The second type consists of hydrophilic particles with a size of >50 microns, which are prone to sedimentation.
The study of the effect of the introduction of finely dispersed micro- and nanomaterials into the composition of composite water-coal fuel showed that they can increase the concentration of the solid phase without reducing the aggregation and sedimentation stability of suspensions. Composite organochemical suspensions with an effective viscosity of up to 1.5 Pa∙s, a solid phase concentration of up to 62%, and a sedimentation stability of > 14 days were obtained. It has been established that the best stabilizers of pyrocarbon-based dispersed systems in the presence of dispersed micro- and nanocomposites are additives based on sulfated naphthalene formaldehyde, with a 1.4-1.7-fold increase in sedimentation stability. These systems can be used as high-calorie liquid fuels as a substitute for fuel oil at power generating enterprises in Ukraine.
It has been shown that in a mixture of nanosized methyl silica, water, and sodium bicarbonate, depending on the method of high-speed mixing of the components, a "dry" powder, a creamy mass, or a two-phase mixture of aqueous and suspension components can be formed. "The dry powder is a silica-encapsulated droplet of aqueous sodium bicarbonate solution and can be used as an effective fire retardant in
Product Description
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Dubrovina Liubov Vasylivna
Klischenko Roman Evgeniyovych
Konoval Olexandr Anatoliyovich
Korniienko Ivan Volodymyrovych
Kosygina Irina Mikhailivna
Kruchko (Potapchuk) Irina Mykolaivna
Mamchenko Olexiy Volodimirovich
Pakhar Tetyana A
Shkutkova Helena Valeriivna
Yakupova Irina Volodymirivna
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2024-01-26
