Mo03 MOLYBDENUM OXIDE

Mo03 MOLYBDENUM OXIDE 30.322 2.3631E-01 -3.7096E-04 3.0598E-07 -9.4632E-11 298 1068 solid... 

In order to circumvent this problem the rate-determining step was bypassed by using more reactive reagents, allyl alcohol and allyl iodide. These allylic probes were expected to adsorb on the molybdenum oxide surface to provide, respectively, M-O-C and M-C bonded intermediates. These studies were carried out with a sample of 9.0 wt% Mo03/Si02, which Raman spectroscopy and x-ray diffraction showed to consist of fine (- 5nm) crystallites of M0O3 (23). 

Other denuder coatings for NH3 include molybdenum oxide, from which ammonia is thermally desorbed and converted to NO for measurement as in the tungstic acid method with Mo03 as the coating, some of the NH3 thermally desorbs directly in the form of NO (Langford et al., 1989). In addition, oxalic acid has been used as a coating and the NH3 collected as ammonium... 

It has been demonstrated that highly selective and active catalysts can be formed by activating either oxidized molybdenum carbide Mo2C or molybdenum oxide Mo03 itself with a hydrocarbon/hydrogen mixture. The active catalysts obtained from the two sources are similar in their catalytic behaviour and are probably both molybdenum oxycarbide (MoO Cy). They are selective for the isomerization of a number of n-hydrocarbons with the main products always consisting of monomethyl isomers but with an important contribution from the dibranched products,... 

As a catalyst for propylene oxidation, Bi203 itself has fairly low activity and yields primarily the products of complete oxidation. Pure molybdenum trioxide has an even lower activity, but is fairly selective. In combination, however, remarkable activity and selectivity for propylene oxidation is obtained. Although industrial catalysts contain silica and phosphate as well as Bi203 and Mo03, many fundamental studies have employed catalysts containing only bismuth and molybdenum oxides in an attempt to determine the structure of the catalytically active phase. As a result of such studies, it is now known that bismuth molybdate catalysts display their superior properties only if the catalyst composition lies within the composition range of Bi/Mo = f to f (atomic ratio). 

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