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IJCT Vol.17(1) [January 2010] >


Title: Gas-phase oxidant-free oxidation of cyclohexanol over V2O5-MoO3-M2O (M = Na, K, Cs) catalysts
Authors: Vyawahare, Y K
Chumbhale, V R
Pardhy, S A
Samuel, V
Aswar, A S
Keywords: Cyclohexanol
Dehydrogenation
Dehydration
V2O5-MoO3
Electronegativity
Issue Date: Jan-2010
Publisher: CSIR
Abstract: Oxidant-free oxidation (dehydrogenation) of cyclohexanol is carried out in a down-flow integral laboratory scale reactor using different alkali doped catalysts. The effect of reaction temperature, contact time (W/F) and doping of alkali metals is studied to check its effect on nature of prominent products of the reaction (cyclohexanone and cyclohexene). At lower temperature the cyclohexanone prevails whereas at higher temperature cyclohexene is observed in prominence. Acid-modified catalysts (with boron and phosphorous) facilitated cyclohexene selectivity whereas alkali modified catalysts facilitated cyclohexanone selectivity. Calcination of sodium modified catalyst at different temperatures under static condition affect characteristic phase intensity and cyclohexanone selectivity. XRD investigation showed formation of different inorganic phases as the characteristic of dopant. Cesium modified catalyst showed better dehydrogenation activity.
Page(s): 43-49
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.17(1) [January 2010]

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