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N. A. Galimova N. N. Lobanov Z. V. Pskhu E. A. Platonov M. S. Tret’yakova V. D. Yagodovskii 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(2):338-340
We studied how treatment of 0.64 wt % Pt/SiO2 catalyst with a glow-discharge plasma in O2 and a high-frequency plasma in H2 (HF H2) influences the cyclohexane dehydrogenation reaction. The effect of plasmochemical treatment on the average diameter of platinum
particles was established by the method of X-ray diffraction analysis. It was found that oxygen plasma increases the surface
area of the metal by ∼15% and diminishes activity by raising the activation energy and reducing the number of active centers
per unit surface of the metal. The HF H2 plasma increases the reaction rate constant many times over, due to the number of active centers per unit surface of the
metal rising sharply while the size of the Pt particles remains unchanged. 相似文献
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V. D. Yagodovskii Z. V. Pskhu N. Yu. Isaeva T. V. Yagodovskaya R. A. Kifyak K. S. Belyaeva 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2009,83(5):732-736
The influence of glow discharge plasma in oxygen and argon and high-frequency discharge plasma in hydrogen on the activity of the AP-64 (Pt/γ-Al2O3) catalyst in the dehydrogenation of cyclohexane was studied. The catalytic experiments were performed in a flow unit and under static conditions in a vacuum. Under flow conditions, catalyst treatment with plasmas in O2 and Ar decreased the yield of benzene by ~50% but strengthened temperature hysteresis because of the formation of active carbon on the surface of the catalyst. Under static conditions, argon plasma and high-frequency discharge H2 plasma multiply increased the rate of the reaction because of an increase in the number of active centers, whereas an oxygen plasma decreased the rate of the reaction by two times because of an increase in activation energy. The determination of the order of the reaction led us to suggest that the stage scheme of the reaction did not change after plasma chemical catalyst treatments. 相似文献
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A. V. Pskhu 《Mathematical Notes》2005,77(3-4):546-552
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Technical Physics - We propose a method for describing damped vibrations of a beam with a built-in end considering the dynamic hysteresis that determines mechanical energy dissipation due to... 相似文献
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A. V. Pskhu 《Differential Equations》2017,53(9):1160-1164
We construct an explicit representation of the solution of a multidimensional Abel integral equation of the second kind with partial fractional integrals in terms of the Wright function. 相似文献