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The kinetics of ethylene oxidation by PdCl2 and CrO3 complexes supported on silica gel (300 K, closed batch reactor) and the adsorption of C2H4 by silica gel and metal complex reaction centers (M
n
) were studied. A new version of the kinetic distribution method was applied to determine the rate constants of ethylene reactions with metal complexes with consideration for the equilibrium distribution of C2H4 among the reactor gas phase, silica gel, and M
n
. The rate constant of a first-order reaction with respect to Cr(VI) (k
e) remained constant as [M
n
] was increased up to 0.15 mol % with the absence of detectable ethylene adsorption by chromium(VI). In the case of Pd(II)/SiO2, strong ethylene adsorption by palladium(II) was found, and k
e was an exponential function of [M
n
]. This exponential function is indicative of an increase in the specific activity of Pd(II) with palladium concentration on SiO2. Taking into account the adsorption of ethylene (physisorption on SiO2 and chemisorption on Pd(II)), we found an analogy between the kinetic behaviors of Pd(II) in reactions with ethylene on silica gel and with ethylene and other hydrocarbons in solutions. 相似文献
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A pulsed plasma generator ignited by plasma produced by laser radiation is described. The plasma generator can provide a relatively high-velocity plasma jet of specific chemical composition. The principal parameters of the plasma jet (its velocity, charged particle concentration, and temperature) have been measured and the properties of the plasma jet have been found to be independent of the polarity of the plasma generator ring electrode.The authors are grateful to M. A. El'yashevich for discussing the present paper. 相似文献
6.
Variations in the electronic configuration of iron and titanium ions in vitreous systems were studied by the methods of x-ray spectroscopy. It was found that the crystallization temperature and the oxide content in vitreous systems significantly affect the electronic configuration of iron and titanium ions.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 30–34, September, 1976. 相似文献
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