Mechanism of hydrogenolysis and isomerization of oxacycloalkanes on metals. III. Effect of partial pressure of hydrogen on the selectivity of hydrogenolysis of oxacycloalkanes on Pt
The rates of hydrogenolysis and isomerization of methyloxirane, cis- and trans-2,3-dimethyloxirane and 2-methyloxetane were studied on a Pt/C catalyst, as functions of the hydrogen pressure and the temperature. A new phenomenon was observed in the case of 2-methyloxetane: the change in mechanism as the temperature was elevated led to a change in regioselectivity. There is no such effect for methyloxirane, for which the dissociative mechanism is not competitive at high hydrogen pressure. Likewise, the mechanisms of transformation of methyloxirane and the 2,3-dimethyloxiranes are not the same. Methyloxirane probably participated in edgewise adsorption on the surface of the catalyst, while cis-2,3-dimethyloxirane undergoes flat adsorption.
- Research Organization:
- Jozsef Attila Univ., Szeged, Hungary
- OSTI ID:
- 5536258
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 100:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALKANES
CARBON
CATALYST SUPPORTS
CATALYTIC EFFECTS
CATALYTIC REFORMING
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CYCLOALKANES
ELEMENTS
HYDROCARBONS
HYDROGEN
HYDROGENATION
ISOMERIZATION
KINETICS
METALS
NONMETALS
ORGANIC COMPOUNDS
PARTIAL PRESSURE
PLATINUM
PLATINUM METALS
PRESSURE DEPENDENCE
REACTION KINETICS
REFORMER PROCESSES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS