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1.
The results obtained by studying zinc oxide non-stoichiometrization are presented. The kinetic parameters values under nonisothermal conditions were calculated too. Both the nonstoichiometric zinc oxide composition and the kinetic parameter values are depending on the generating substances.
Zusammenfassung Die Ergebnisse der Untersuchungen der Nichtstöchiometrisierung von Zinkoxid werden vorgeführt.Die Werte der kinetischen Parameter unter nicht-isothermen Bedingungen wurden eben falls berechnet.Sowohl die nichtstöchiometrische Zusammensetzung des Zinkoxids als auch die Werte der kinetischen Parameter hängen von der das Phänomen auslösenden Substanz ab.
Résumé On présente les résultats d'une étude sur la formation d'oxyde de zinc non-stchiométrique. Les valeurs des paramètres cinétiques en conditions non-isothermes sont égale ment calculées. La composition de l'oxyde de zinc non-stchiométrique ainsi que les valeurs des paramètres cinétiques dépendent du composé de départ.
, , . .相似文献
2.
A polymer catalyst has been synthesized on the basis of Amberlite IRA-45 anion-exchange resin modified with molybdenum hexacarbonyl. Its catalytic activity in the epoxidation of propylene with tert-butyl hydroperoxide is similar to the activity of Mo(CO)6 used under homogeneous conditions.
, - Amberlite IRA-45, . - Mo(CO)6, .相似文献
3.
A. M. Kamiski 《Reaction Kinetics and Catalysis Letters》1987,34(1):57-62
Pyrolysis of propane in the presence of ethylene and ethylene labeled with14C has been studied in the temperature range 773–1019 K. The disappearance of the inhibiting effect of ethylene on the thermal decomposition of propane with increasing temperature was observed.
14C 773–1019 . .相似文献
4.
《Reaction Kinetics and Catalysis Letters》1979,10(3):271-274
: . - .
Examples are given of the non-uniqueness of the inverse problem of chemical kinetics. i.e. determination of the rate constants from experimental data. The results are interpreted via a kinetic model for the complex reaction of phenol alkylation by methanol on -Al2O3.相似文献
5.
Photoadsorption, photooxidation and photodecomposition of simple molecules on alkali halide surfaces
V. K. Ryabchuk L. L. Basov Yu. P. Solonitzyn 《Reaction Kinetics and Catalysis Letters》1988,36(1):119-124
Data have been obtained on the activities of 19 alkali halides in photoadsorption of O2 and CO2, photooxidation of H2 and CO and photodecomposition of H2O and CO2.
19 O2 CO2, H2 CO H2O CO2.相似文献
6.
V. Cortés Corberán G. Kremenic L. González Tejuca 《Reaction Kinetics and Catalysis Letters》1988,36(1):235-240
The effect of UO3 on the acidity of MoO3–UO3/SiO2 catalysts has been studied by means of infrared spectroscopy of adsorbed pyridine. The surface acidity exhibited a maximum for the same U/(U+Mo) atomic ratio (=0.11) that yielded a maximum in total conversion for isobutene oxidation. The catalytic properties for oxidation are discussed in terms of the acidic properties of the samples.
UO3 MoO3–UO3/SiO2 . U/(U+Mo)=0,11, . , .相似文献
7.
《Reaction Kinetics and Catalysis Letters》1975,3(4):443-448
- (I) (III) -- (40–60% .) H2SO4 W3=k3·[I]·[II]. (I). k1 k2 k3 : 1gk1=–3, 36–1, 11·Ho; 1gk
2
=–2, 84–1, 11·Ho; 1gk3=–2, 35–1, 32·Ho. 10,7; 27,8; 23,8 /, .
The Prins reaction of acetaldehyde (III) with -methylstyrene (I) in 40:60 vol. % water-dioxan in the presence of H2SO4 obeys the rate law W3-k3[I] [II]. In addition to the Prins reaction I undergoes both hydration and dimerization. The rate constants for hydration (k1), dimerization (k2) and for the Prins reaction (k3) depend on the acidity of the medium: lg k1=–3.36–1. 11Ho. lg k2=–2.84–1. 11 Ho. lg k3=2.35–1. 32 Ho. The experimental activation energies are 10.7, 27,8 and 23.8 kcal/mol, respectively.相似文献
8.
G. L. Elizarova L. G. Matvienko N. V. Lozhkina V. N. Parmon 《Reaction Kinetics and Catalysis Letters》1983,22(1-2):49-53
Some peculiarities of reduction of one-electron oxidants, Ru(bpy)
3
3+
and Ru(bpy)2(py)
2
3+
, in the absence of catalysts (when oxidation of the oxidant's ligands occurs) and in their presence (when also oxidation of water to dioxygen occurs) are discussed. Both oxidation reactions are thought to have a common intermediate.
Ru(bpy) 3 3+ Ru(bpy)2(py) 2 3+ ( -) ( ). , .相似文献
9.
Hydrogen influences the activity and selectivity of a Pt/H-ZSM-5 zeolite in ethane aromatization by favoring hydrogenolysis and suppressing dehydrogenation and coking. H2 formed during the reaction inhibits the aromatization activity.
Pt/H-ZSM-5 , . H2, , .相似文献
10.
S. N. Vereshchagin A. G. Anshits V. D. Sokolovskii N. G. Maksimov 《Reaction Kinetics and Catalysis Letters》1984,26(3-4):419-423
Catalytic properties of AlBr3, AlBr3–CuCl2 and AlBr3–NiSO4 in liquid-phase conversion of butane and pentane have been examined. A possibility for the oxidative condensation has been revealed due to both the stoichiometric reduction of Ni2+ and Cu2+ ions entering into the composition of superacid catalysts, and the catalytic oxidation in the presence of bromine as an oxidant. Nature of the centers responsible for the oxidative condensation of lower paraffins is discussed.
AlBr3; AlBr3–CuCl2; AlBr3–NiSO4 . , Ni2+, Cu2+, , . , .相似文献