Abstract
The mass-spectrometric investigation of the kinetics of chemisorption under the conditions of linear temperature increase was tested on the example of the hydrolysis of methoxysilyl groups on the surface of aerosil; a constant vapor pressure of the modifier was maintained above the adsorbent. It has been established that the above-mentioned reaction proceeds in the kinetic region according to an impact mechanism, and that its rate is limited predominantly by the entropy factor.
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B. Evans and T. E. White, “Adsorption and reaction of methylchlorosilanes at aerosil surface,” J. Catal.,11, No. 4, 336 (1968).
V. A. Tertykh, A. A. Chuiko, V. M. Mashchenko, and V. V. Pavlov, “Characteristics of the chemisorption of trimethylchlorosilane on silica surface,” Zh. Fiz. Khim.,47, No. 1, 158 (1973).
W. Hertl, “Mechanism of gaseous siloxane reaction with silica,” J. Phys. Chem.,72, No. 4, 1248 (1968).
H. L. Hair and W. Hertl, “Reactions of chlorosilanes with silica surfaces,” J. Phys. Chem.,73, No. 7, 2372 (1969).
A. A. Chuiko, “Chemistry of the SiO2 surface, nature and role of active centers of silica in adsorption and chemisorption processes,” Doctor Dissertation, Kiev (1971).
V. A. Tertykh, V. V. Pavlov, K. I. Tkachenko, and A. A. Chuiko, “Basic regularities in the interaction of silanol groups of silica with alkylchlorosilanes of the series ClnSiCH3(4−n) (n=0-4),” Teor. Éksp. Khim.,11, No. 2, 174 (1975).
W. Hertl, “Mechanism of gaseous siloxane reaction with silica. 2.,” J. Phys. Chem.,72, No. 12, 3993 (1968).
R. J. Cvetanovic and Y. Amenomija, “Application of a temperature-programmed desorption technique to catalyst studies,” Adv. Catal.,17, 103 (1967).
R. J. Cvetanovic and Y. Amenomija, “A temperature-programmed desorption technique for investigation of practical catalysts,” Catal. Rev.,6, 21 (1972).
I. I. Ioffe and L. M. Pis'men, Engineering Chemistry of Heterogeneous Catalysis, [in Russian], Khimiya, Leningrad (1972).
H. Noller and G. Ritter, “Temperature-programmed desorption of methanol, ethanol, propan-1-ol, and propan-2-ol in silica-magnesia mixed oxides,” J. Chem. Soc. Faraday Trans.,80, No. 2, 275 (1984).
V. A. Tertykh, V. V. Pavlov, and V. I. Vatamanyuk, “Influence of the third component on the course of the reaction in the surface layer of silica,” Adsorbtsiya Adsorbenty, No. 4, 57 (1976).
V. A. Tertykh and V. V. Pavlov, “Reactivity of molecules attacking a fixed center,” Adsorbtsiya Adsorbenty, No. 6, 67 (1978).
Yu. I. Gorlov, V. G. Golovatyi, M. M. Konoplya, and A. A. Chuiko, “Field desorption of water from the surface of silica and structure of its hydrate coating,” Teor. Éksp. Khim.,16, No. 2, 202 (1980).
V. A. Roiter and G. I. Golodets, Introduction into the Theory of Kinetics and Catalysis [in Russian], Naukova Dumka, Kiev (1971).
B. N. Laskorin, V. V. Strelko, D. N. Strazhesko, and V. I. Denisov, Sorbents Based on Silica Gel in Radiochemistry [in Russian], Atomizdat, Moscow (1977).
A. A. Chuiko, V. V. Pavlov, A. I. Sherstyuk, and V. A. Tertykh, Kolloidn. Zh.,36, No. 5, 1012 (1974).
S. Glasstone, K. Laidler, and H. Eyring, Theory of Rate Processes, McGraw-Hill (1941).
K. A. Andrianov, Organosilicon Compounds [in Russian], Goskhimizdat, Moscow (1955).
R. C. Baetzold and G. A. Somorjai, “Preexponential factors in surface reactions,” J. Catal.,45, No. 1, 94 (1976).
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Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 21, No. 5, pp. 634–637, September–October, 1985.
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Brei, V.V., Chuiko, A.A. Mass-spectrometric investigation of the kinetics of hydrolysis of methoxysilyl groups on the surface of silica under the conditions of linear temperature increase. Theor Exp Chem 21, 607–610 (1985). https://doi.org/10.1007/BF00944105
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DOI: https://doi.org/10.1007/BF00944105