Catalytic behavior of vanadium and titanium substituted mesoporous molecular sieves in gas and liquid phase oxidations of hydrocarbons
- Yale Univ., New Haven, CT (United States)
First now, transition metal containing oxides are important oxidation catalysts. Special interest has been devoted to develop systems with uniform pore size distribution, which allow large molecules to reach the active sites inside the structure. In the present paper, a series of vanadium and titanium containing mesoporous molecular sieves of the MCM-41 type have been synthesized by systematically varying the pore size and metal loading. The mesoporous structure was confirmed by XRD and nitrogen adsorption. To obtain information about the incorporated metals, samples were characterized by FTIR, UV-VIS and MAS NMR spectroscopies. Results obtained for oxygen chemisorption and oxidation of methanol and ethanol in the gas phase may be correlated with the pore sizes (bond angles) and the metal content of the catalyst. Further, the influence of the location and coordination of vanadium and titanium inside the MCM-41 structure on the catalytic behavior in the hydroxylation of phenol and epoxidation of olefins will be discussed.
- OSTI ID:
- 370122
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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