2018 ЖЫЛ
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№ |
Мақаланың тақырыбы |
Авторлары |
Жыл |
Журналдың атауы |
Қысқаша аннотация |
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1 |
Structure transformations in thin films of CF 3 -CFH 2 cryodeposites. Is there a glass transition and what is the value of T g ? |
Drobyshev, A., Aldiyarov, A., Nurmukan, A., Sokolov, D., Shinbayeva, A.
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2018 |
Applied Surface Science |
In the temperature range 16–100 K, IR spectrometric studies of thermally stimulated transformations in cryocondensed Freon 134a films were carried out. It was found that Freon 134a cryofilms, formed at T = 16 K, under heating range from 70 to 90 K undergo multiple structural transformations of various nature. It was concluded that at a temperature of T g = 72 K, takes place the glassy state transition to the supercooled liquid (G-SCL). At about T = 78 K, crystallization of SCL begins the state of an orientationally disordered plastic crystal. At a transition temperature T trans = 80 K, a second quasi-glass transition occurs from the state of the orientation glass to a plastic crystal with an ordered rotational subsystem. Within temperature range 83–85 K, a plastic crystal-monoclinic crystal phase transition takes place. |
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2 |
Modeling of Heat Mass Transfer in High-Temperature Reacting Flows with Combustion
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Askarova, A.S., Bolegenova, S.A., Maximov, V.Y., Beketayeva, M.T.
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2018 |
High Temperature ttps://doi.org/10.1134/S0018151X1805005X
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A multiprocessor computer system suitable for physical, mathematical, and chemical models, as well as an exact method for the solution of a system of differential equations that describe the actual combustion of a pulverized coal flare, are necessary to study the numerically complex, physicochemical processes occurring in the combustion chambers of power plants. The results of numerical simulation can provide quite a high accuracy. However, the task of setting up a physical and mathematical model with the correct initial and boundary conditions has yet to be completed. In this paper, we studied heat and mass transfer in high-temperature reacting flows during the burning of Karaganda coal in the combustion chamber of an actual power boiler of a thermal power plant in Kazakhstan. The optimal conditions for computational experiments that correspond to real combustion processes are determined. |
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3 |
Processing of biomedical waste in plasma gasifier |
Messerle, V.E., Mosse, A.L., Ustimenko, A.B.
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2018 |
Waste Management https://doi.org/10.1016/j.wasman.2018.08.048
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The problem of treatment of household and biomedical waste containing toxic substances is becoming increasingly important. In contrast to the conventional incineration, plasma gasification of the waste provides reliable destruction of highly toxic dioxins, benzo(a)pyrene and furans. This article presents the results of thermodynamic analysis and experiments on gasification of the waste of various origins in the plasma reactor. The calculations have shown that the maximum yield of synthesis gas in the waste plasma gasification in the air and steam medium was achieved at a temperature not higher than 1600 K. It is shown that in the process of air-plasma and steam-plasma gasification of bone tissue, it is possible to obtain synthesis gas with concentrations 53.4 and 84.9 vol.% having heat of combustion 3510 and 5664 kJ/kg, respectively. In the air and steam plasma gasification of household waste a high-calorific synthesis gas with concentrations 82.4 and 94.5 vol.%, respectively, can be obtained. Its heat of combustion amounts to 13,620 and 18,497 kJ/kg respectively for air and steam gasification. A comparison between the experiment and the calculations showed a good agreement. According to the results of investigations of the waste plasma gasification, no harmful impurities were detected. From the waste organic and mineral mass, respectively, high-calorific synthesis gas and a neutral slag were obtained. |