Investigation of the relationship between the bulk and surface composition of tin and antimony mixed oxide catalysts and the oxidative dehydrogenation of 1-butene to butadiene

Journal Article · Fri Jun 15 04:00:00 EDT 1979 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(79)90245-8· OSTI ID:6917115

Herniman, H J; Pyke, D R; Reid, R

The oxidative dehydrogenation of 1-butene to butadiene from a feed of 50Vertical Bar3< air, 45Vertical Bar3< nitrogen, 5Vertical Bar3< 1-butene at 150/sup 0/-400/sup 0/C was tested on tin-antimony mixed oxides containing 0-100Vertical Bar3< antimony calcined at 400/sup 0/-1000/sup 0/C for 16 hr or at 1000/sup 0/C to constant weight (2-3 weeks, evaporation of excess Sb/sub 2/O/sub 4/). A correlation of butadiene selectivity with catalyst structure suggested that SnO/sub 2/ has a basic activity for butadiene formation which is improved by the presence of individual surface antimony cations surrounded entirely by tin atoms. Similarly, the formation of carbon dioxide appeared to be associated with surface tin ions surrounded only by other tin ions. The catalysts calcined for 16 hr had poorly defined crystalline bulk phases, incomplete phase separation, and unequilibrated bulk compositions and showed complex composition-activity patterns.

• Research Organization: ICI
• OSTI ID: 6917115
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 58:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical &amp; Physicochemical Properties
400301 -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ALKENES
ANTIMONY COMPOUNDS
ANTIMONY OXIDES
BUTENES
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CORRELATIONS
CRYSTAL STRUCTURE
DEHYDROGENATION
HYDROCARBONS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SURFACES
TESTING
TIN COMPOUNDS
TIN OXIDES