Collect. Czech. Chem. Commun. 1988, 53, 459-465

IR study of dynamic bahaviour of 2-propanol on alumina

Vladimír Moráveka, Miloš Krausa, L. V. Malyshevab, E. A. Paukshtisb and E. N. Yurchenkob

a Institute of Chemical Process Fundamentals Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol, Czechoslovakia
b Institute of Catalysis, Academy of Sciences of the U.S.S.R., 630 090 Novosibirsk, U.S.S.R.


Dynamic behavior of surface complexes of 2-propanol on aluminia during adsorption and dehydration was studied using IR spectroscopy. Good agreement was found between the first-order rate constants of alkene formation in pulse-flow experiments and that of disapearance of a reactive surface complex. It was shown that the simple surface alkoxide 2-Pr-O-Al remains on the surface constant temperature, but it can be completely removed by hydrolysis, or by heating up to 200 °C. The surface carboxylates are formed very slowly and are stable even in the presence of water vapour at 300 °C.