The kinetics of the oxidation of 1-butene and butadiene over a vanadium-phosphorus mixed oxide catalyst prepared by reduction of V,O, in an organic medium were investigated. Increased 1-butene concentration in the feed strongly inhibited the rate of maleic anhydride formation but did not affect the rate of formation of the other products (methyl vinyl ketone, crotonaldehyde, acetaldehyde, and carbon oxides). The inhibition was interpreted by a Langmuir- Hinshelwood type model where the ratedetermining step is the reaction between adsorbed oxygen and the intermediate butadiene adsorbed on two adjacent sites. The rates of formation of the other byproducts are interpreted by expressions which correspond to the reaction between 1-butene or butadiene adsorbed on one site and adsorbed or gaseous oxygen. Satisfactory fit of the derived rate expression with the experimental data was obtained
Cavani F., Centl G., Trifiro F. (1983). Oxidation of 1-Butene and Butadiene to Maleic Anhydride. 2. Kinetics and Mechanism. INDUSTRIAL & ENGINEERING CHEMISTRY PRODUCT RESEARCH AND DEVELOPMENT, 22(4), 570-577 [10.1021/i300012a011].
Oxidation of 1-Butene and Butadiene to Maleic Anhydride. 2. Kinetics and Mechanism
Cavani F.;
1983
Abstract
The kinetics of the oxidation of 1-butene and butadiene over a vanadium-phosphorus mixed oxide catalyst prepared by reduction of V,O, in an organic medium were investigated. Increased 1-butene concentration in the feed strongly inhibited the rate of maleic anhydride formation but did not affect the rate of formation of the other products (methyl vinyl ketone, crotonaldehyde, acetaldehyde, and carbon oxides). The inhibition was interpreted by a Langmuir- Hinshelwood type model where the ratedetermining step is the reaction between adsorbed oxygen and the intermediate butadiene adsorbed on two adjacent sites. The rates of formation of the other byproducts are interpreted by expressions which correspond to the reaction between 1-butene or butadiene adsorbed on one site and adsorbed or gaseous oxygen. Satisfactory fit of the derived rate expression with the experimental data was obtainedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
