Collect. Czech. Chem. Commun. 2001, 66, 575-587

Kinetics of Oxidative Dehydrogenation of Isobutyric Acid Over K2HPMo12O40 Catalyst

Pavel Čičmaneca,*, Josef Tichýa and Blanka Wichterlováb

a Department of Physical Chemistry, University of Pardubice, Čs. Legií 565, CZ-532 10 Pardubice, Czech Republic
b J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague 8, Czech Republic


The kinetics of oxidative dehydrogenation of isobutyric acid has been studied in gas phase over the K2HPMo12O40 catalyst. The rate of consumption of isobutyric acid and of formation of methacrylic acid and acetone depending on the degree of conversion of isobutyric acid indicated an autocatalytic reaction mechanism. A model of MoVI-O-MoV site has been suggested and the autocatalytic process to be due to formation of this site.

Keywords: Oxidations; Isobutyric acid; Methacrylic acid; Oxidative dehydrogenation; Heteropoly acid; Phosphomolybdates; Heterogeneous catalysis.

References: 10 live references.