Collect. Czech. Chem. Commun. 1989, 54, 2998-3002

Influence of water on activity, selectivity and deactivation of zeolites in acetone transformation

Jiří Čejka and Pavel Jírů

The J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, 182 23 Prague 8


The suppression of the deactivation of acid forms of zeolites in acetone transformation was studied by adding water vapours to the feed. Both conversion of acetone and yield of isobutene increased remarkably. Water prevents the substitution of bridging hydroxyls for coke species and limits the aldolization steps, which are decisive for catalyst deactivation.