ISSN:
1572-879X
Schlagwort(e):
Propane dehydrogenation
;
nickel molybdate
;
NiMoO4 propene formation
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract The α- and β-phases of NiMoO4 have been investigated with different techniques (X-ray diffraction, electrical conductivity, IR spectroscopy) in order to tentatively rationalise the different catalytic activities observed in the oxidative dehydrogenation of propane to propene. XRD analyses have shown that at 595 ° C, the β-phase is already present but a temperature of ∼ 700 ° C is required to obtain a full conversion into a pure β-phase. Electrical conductivity showed the presence of anionic vacancies. It is proposed that propene is formed by the reaction of propane with surface O2- anions. The β-phase is almost twice more selective in propene formation than the α-phase for comparable conversion at identical temperatures. This could derive from different oxygen environments on the active catalytic site.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00772070
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