Kinetic analysis of 1-butene oxidation to maleic anhydride (MA) with a polyfunctional catalyst
Kinetic analysis of 1-butene oxidation to maleic anhydride (MA) with a polyfunctional catalyst, a phosphorus/vanadium oxide (PVO) with P/V ratios of 1.3:1 or 1.4:1, carried out in a pulse microreactor or a continuous-flow integral microreactor, suggested the presence of two different types of active sites on the catalyst surface responsible for 1-butene oxidation to butadiene (the main intermediate) and oxidation of the latter to MA. Carbon oxides are formed at both types of active sites. Butadiene is probably formed via a redox mechanism involving lattice oxygen, whereas the second stage, which is considerably more selective, involves adsorbed oxygen species. The selectivity of the first stage was improved by adding a bismuth molybdate (2:1 Bi/Mo) at 1:2 by wt to the PVO. This modification also increased considerably the over-all reaction rate and MA yield, which approached that obtained in oxidation of pure butadiene.
- Research Organization:
- Inst. Technol. Chim. Spec. Bologna
- OSTI ID:
- 6199787
- Journal Information:
- Ind. Eng. Chem., Prod. Res. Dev.; (United States), Journal Name: Ind. Eng. Chem., Prod. Res. Dev.; (United States) Vol. 18:4; ISSN IEPRA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADDITIVES
ALKENES
ANHYDRIDES
BISMUTH
BUTADIENE
BUTENES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
DIENES
ELEMENTS
HYDROCARBONS
KINETICS
METALS
MOLYBDATES
MOLYBDENUM COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOSPHORUS
POLYENES
PULSE TECHNIQUES
QUANTITY RATIO
REACTION INTERMEDIATES
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SPECIFICITY
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES
YIELDS