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D. V. Konev T. A. Kravchenko A. I. Kalinichev N. V. Sotskaya L. N. Polyanskii 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2006,80(8):1309-1314
The rate of the reduction of molecular oxygen from water with a low-capacity copper-containing electron-ion exchanger at various initial ionic forms, grain radii, and sizes of metal particles dispersed into pores. The applicability of the mixed-diffusion and diffusional-kinetic models incorporating a first-order irreversible reaction to describing the system under study was examined. The kinetic parameters of the system were determined within the framework of these models. It was found that the limiting stage of the process in the stationary mode is the internal diffusion of oxygen molecules to the redox sorbent particle. The increase in the rate of the absorption of oxygen by samples containing copper of higher dispersity was observed at the initial stage of the process and was likely associated with an increase in the surface area of the reactive interface. 相似文献
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O. A. Ustinov S. A. Yakunin A. I. Polyanskii V. A. Baluev M. G. Shtutsa L. P. Sukhanov 《Russian Journal of Applied Chemistry》2005,78(10):1636-1639
A pilot installation for catching of nitrogen oxides with water-condensation aerosols, with a throughput of 10 m3 h?1, was tested. A shell-and-tube industrial pilot installation for catching of nitrogen oxides with water-condensation aerosols, with a throughput of 1800 m3 h?1, was fabricated and tested. 相似文献
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M. Yu. Chaika T. A. Kravchenko L. N. Polyanskii V. A. Krysanov 《Russian Journal of Electrochemistry》2008,44(11):1244-1250
Electrochemical reduction of molecular oxygen was studied on a [dispersed copper]-[macroporous KU-23 15/100S sulfocation exchanger with various metal concentrations] composite electrode. It was found that a high proton concentration in the ion-exchange matrix causes a decrease in the oxygen reaction overvoltage. The nanostructured state of copper particles causes stabilization of the intermediate product, i.e., hydrogen peroxide. Using the rotating disk electrode method, it was detected that the process is limited by external diffusion of oxygen to composite grains. The oxygen reaction is mostly concentrated on the grain surface and surface layers; oxygen is reduced in the bulk due to dispersed copper oxidation. 相似文献
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S. A. Soldatova G. S. Gimranova Zh. A. Mamyrbekova K. B. Polyanskii S. V. Akbulatov A. T. Soldatenkov 《Chemistry of Heterocyclic Compounds》2007,43(11):1420-1425
4-Aryl-1,2,3,6-tetrahydropyridinium quaternary salts which have a benzoylmethyl or ethoxycarbonylmethyl group on atom N-1
generate N-ylides when heated in the presence of NaH and they can rearrange in situ with contraction or expansion of the six-membered
heterocycle to give substituted pyrrolidines (as a result of a [2,3]-sigmatropic rearrangement) or 1H-tetrahydroazepine derivatives
(via Stevens rearrangement). The presence of an aryl substituent at position C-4 in the tetrahydropyridine ring allows to
avoid the formation of elimination products and changes the direction of the reaction towards the preparation of the tetrahydroazepines.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1670–1676, November, 2007. 相似文献