ISSN:
1572-879X
Schlagwort(e):
Magnesia
;
alumina
;
hydrotalcite
;
mixed oxides
;
2-propanol dehydration and dehydrogenation
;
butene isomerization
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract In this work, we investigated the effect of catalyst composition on the surface reactivity of magnesium-aluminum mixed oxides using three probe reactions: dehydrogenation of 2-propanol to propanone, dehydration of 2-propanol to propene, and isomerization of 1-butene. Turnover rates were calculated from the total CO2 adsorption capacity of the mixed oxides, assuming one adsorption site corresponds to one active site. Turnover rates for the dehydrogenation of 2-propanol were independent of the catalyst composition, which is consistent with the structure insensitivity of dehydrogenation reactions. The other two probe reactions followed opposite trends with the Mg:Al ratio: as the Al content of the mixed oxides increased, the turnover rate for 2-propanol dehydration increased while that for 1-butene isomerization decreased. The magnitude of these changes confirms that the mixed oxides are truly interdispersed and not present as separate phases.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00815418
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