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Please use this identifier to cite or link to this item: http://purl.org/purl/2322

Title: Vanadia supported on ceria: Characterization and activity in liquid-phase oxidation of ethylbenzene
Authors: Radhika, T
Sugunan, S
Keywords: Vanadia
Ethylbenzene oxidation
Issue Date: Feb-2007
Publisher: Elsevier
Abstract: Vanadia/ceria catalysts (2–10 wt% of V2O5) were prepared by wet impregnation of ammonium metavanadate in oxalic acid solution. Structural characterization was done with energy dispersive X-ray analysis (EDX), powder X-ray diffraction (XRD), BET surface area measurements, FT-IR spectroscopy and nuclear magnetic spectral analysis (51V MASNMR). XRD and 51V MASNMR results show highly dispersed vanadia species at lower loadings and the formation of CeVO4 phase at higher V2O5 loading. The catalytic activity of catalysts was conducted in liquid phase oxidation of ethylbenzene with H2O2 as oxidant. The oxidation activity is increased with loading up to 8 wt% V2O5 and then decreased with further increase in V2O5 content to 10 wt%. Different vanadia species evidenced by various techniques were found to be selective towards ethylbenzene oxidation. The CeVO4 formation associated with increased concentration of vanadia on ceria results the production of acetophenone along with 2-hydroxyacetophenone.
URI: http://dyuthi.cusat.ac.in/purl/2322
ISSN: 1566-7367
Appears in Collections:Dr. Sugunan S

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