Browsing by Author "Ischenko, Olena"

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    The influence of oxidation and heat treatment on the bromination of activated carbon surface
    (Видавництво Львівської політехніки, 2013) Klypa, Kristina; Veselovskyi, Volodymyr; Zaderko, Oleksandr; Diyuk, Vitaliy; Ischenko, Olena
    Abstract – The bromination of activated carbon as a method of the surface functionalization of carbon materials was investigated. It was found that the bromination with an aqueous solution of Br2•KBr is accompanied by the oxidation of the surface. The influence of the surface oxidation and heat treatment on the bromination of activated carbon samples was examined. It was found that the heat treatment can partially or fully recover the reactivity of the surface of the oxidized carbon materials by removing the oxygen-containing functional groups.
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    The kinetic regularities of selective carbon monoxide oxidation over mixed oxide catalysts based on Cu, Co, Fe
    (Видавництво Львівської політехніки, 2013) Veselovskyi, Volodymyr; Zakharova, Tatyana; Ischenko, Olena
    Abstract – The kinetics of CO and H2 oxidation over mixed oxide catalysts based on transition metals (Cu, Co, Fe) were tested in the CO-PROX reaction. The experimental results showed that the CO oxidation rate was essentially independent of H2 and O2 concentrations, while the H2 oxidation rate was practically independent of CO and O2 concentrations. It was shown that the experimental kinetic regularities of CO oxidation could be described by the Mars-van Krevelen equation. In the CO oxidation, the reaction orders were 1 and 0 with respect to the partial pressure of CO and O2, respectively