Conclusions
-
1.
By a differential isotope method involving14C the authors have investigated the surface mobility of chemisorbed molecules of isopropanol during its dehydration in an adsorption layer on aluminum oxide and aluminosilicate.
-
2.
The chemisorbed alcohol molecules possess marked surface mobility which plays a decisive part in the mechanism of surface regeneration of the active catalyst centers in the process of dehydration.
-
3.
The cessation of the reaction long before the adsorbed alcohol is completely used up is explained by the hypothesis that there is local overpopulation of the active sectors by water formed by the reaction; this hinders further surface regeneration and repetition of the elementary events of dehydration.
Similar content being viewed by others
Literature cited
J. K. Breckshoff and R. J. Van Dongen, in: Structure and Properties of Adsorbents and Catalysts [Russian translation], Mir (1973), p. 82; J. J. Scholten and S. Krejer, ibid., p. 168.
G. Gardes, G. Pajonk, and S. Teichner, J. Catal.,33, 145 (1974).
H. Charcosset and B. Delton, Ind. Chim. Belg.,38, 481 (1973).
I. A. Myasnikov, E. V. Bol'shun, and V. S. Raida, Zh. Fiz. Khim.,47, 2349 (1973).
V. Yu. Borovkov and V. B. Kazanskii, Kinetika i Kataliz,15, 705 (1974).
V. É. Vasserberg, Dissertation [in Russian], Moscow (1965).
I. L. Nakhshunova, V. I. Yakerson, and V. É. Vasserberg, Izv. Akad. Nauk SSSR, Ser. Khim., 2124 (1969).
V. É. Vasserberg, in: Problems of Kinetics and Catalysis [in Russian],12, 229 (1968).
V. É. Vasserberg, A. A. Balandin, and T. V. Georgievskaya, Dokl. Akad. Nauk SSSR,140, 1110 (1961).
R. W. Maatman, J. Catal.,19, 64 (1970).
V. É. Vasserberg, L. Makhlis, and I. Nakhshunova, Izv. Otd. Khim. Nauki B'lg. Akad. Nauk,6, 449 (1973).
L. A. Makhlis and V. É. Vasserberg, Dokl. Akad. Nauk SSSR,203, 888 (1972).
N. P. Keier and S. Z. Roginskii, Dokl. Akad. Nauk SSSR,57, 157 (1947).
P. H. Emmet and I. T. Kummer, J. Amer. Chem. Soc.,73, 2866 (1951).
R. P. Eischens, J. Amer. Chem. Soc.,74, 6167 (1952).
N. P. Keier, in: Problems of Kinetics and Catalysis [in Russian], No. 8, Nauka (1955), p. 224.
Author information
Authors and Affiliations
Additional information
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 493–498, March, 1976.
The authors thank A. V. Mikhalev and G. S. Libinson (All-Union Scientific-Research Institute of Antibiotics) for lending them the high-sensitivity Calvet calorimeter to measure the heats of adsorption.
Rights and permissions
About this article
Cite this article
Makhlis, L.A., Vasserberg, V.É. The mobility of chemisorbed molecules and the surface regeneration of active centers in the dehydration of isopropanol on aluminum oxide and aluminosilicate. Russ Chem Bull 25, 476–480 (1976). https://doi.org/10.1007/BF01106635
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01106635