共查询到10条相似文献,搜索用时 187 毫秒
1.
E. M. Sadovskaya S. A. Pokrovskaya Y. A. Yabrov A. A. Ivanov 《Reaction Kinetics and Catalysis Letters》1989,39(2):431-436
Based on numerical analysis of experimental data, the main ideas of the reaction mechanism have been confirmed and kinetic principles of the non-steady=state reaction have been determined.
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2.
B. B. Zharkov L. B. Galperin V. L. Medzhinskii L. F. Butochnikova A. N. Krasilnikov I. D. Yakovleva 《Reaction Kinetics and Catalysis Letters》1986,32(2):457-462
Presence of two maxima on the DTA curves of coked catalysts is attributed to the metal-catalyzed oxidation of less polymerized coke in a higher temperature region.
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3.
Liquid-phase hydrogenation of cyclohexene by dihydrogen in the presence of dimolybdenum tetraacetate
Catalytic liquid-phase hydrogenation of cyclohexene in DMF by dihydrogen in the presence of dinuclear bridged complex Mo2(OAc)4 has been studied. A kinetic equation for the steady-state rate of cyclohexene hydrogenation and the activation parameters are suggested.
Mo2(OAc)4. .相似文献
4.
A. I. Vagin V. I. Erofeev I. V. Kalechits 《Reaction Kinetics and Catalysis Letters》1982,21(3):309-314
According to kinetic studies on the reduction of commercial Co–Mo/Al2O3 and model catalysts in H2 at 523–773 K, the kinetic curves for the reduction process have been determined. The reduction rate is shown to be higher for the commercial catalyst. Activation energies Eact for the reduction of several forms of Mo and Co in Co–Mo/Al2O3 catalysts are presented.
H2 523–773 . , : Mo Co .相似文献
5.
Ohne Zusammenfassung
Determination of organochloroinsecticide residues in soilsI. Determination of -, -, -, -, -HCH and HCB相似文献
6.
Comparison of adsorptive properties of Rh–Al2O3 catalysts in relation to H2, O2 and CO as adsorbates points to different surface interactions between the adsorbates and metallic surface of the catalysts. The differences may result from the changing composition of bimetal surface in relation to the catalyst composition and/or from the changing stoichiometry of surface interactions of the adsorbates.
H2, O2 CO Rh–Ag/Al2O3 . , , () .相似文献
7.
D. Duprez P. Pereira J. Barbier R. Maurel 《Reaction Kinetics and Catalysis Letters》1980,13(3):217-223
Two deactivation factors of Rh/-Al2O3 catalysts in toluene steam dealkylation are examined: deactivation during working and sulfur poisoning. Onstream deactivation is only due to coke deposit. Specific activity per free exposed fraction of the metal is constant. Sulfur is a strong non-selective poison which may hinder coke formation.
Rh/-Al2O3 : . . . , .相似文献
8.
A simple glass device is described acting as stopcock and winch at the same time. The device is especially suitable for the dislocation of solid sample holders in IR cells.
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9.
P. V. Srinivasulu M. Adinarayana B. Sethuram T. Navaneeth Rao 《Reaction Kinetics and Catalysis Letters》1985,27(1):167-172
Kinetics of OsO4 catalyzed oxidation of chalcones by Ce4+ has been studied in aqueous acetic-sulfuric acid medium in the temperature range 313 to 338 K. The order in [oxidant] is zero while the order with respect to [substrate] and [catalyst] are each fractional. The rate of the reaction decreased with increase in percentage of acetic acid while [H+] had practically no effect on the rate The rates of various substituted chalcones (with substituents in the phenyl. ring attached to the moiety) are in the orderp-CH3>m-CH3>H>p-Cl>m-Cl>m-NO2>p-NO2. A mechanism in which formation of a cyclic ester between chalcone and OsO4 in a fast step followed by its decomposition in a rate-determining step is envisaged.
Ce4+, OsO4, - 313–338 . —, —. , [H+] . ( , : -CH3>-CH3>H>-Cl>-NO2>-NO2. , OsO4 , , .相似文献
10.
Differential scanning calorimetry has been applied to derive the fusion enthalpies and entropies of series of mono and dimethylphenols, mono and dichlorophenols, and mono and dinitrophenols.
Zusammenfassung DSC wurde verwendet zur Ermittlung der Schmelzenthalpie und Entropie der Reihen von Mono- und Dimethylphenolen, Mono- und Dichlorphenolen, Mono- und Dinitrophenolen.
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