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Characterization of ZnO and Modified ZnO Catalysts for Anaerobic Oxidation of Cyclohexanol

Author Affiliations

  • 1University Institute of Chemical Technology, North Maharashtra University, Jalgaon – 425001, INDIA
  • 2Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Pune-411008, INDIA

Res.J.chem.sci., Volume 3, Issue (7), Pages 38-44, July,18 (2013)

Abstract

Cyclohexanone is an important intermediate because of its use in the manufacture of e-caprolactum which is used for the production nylon 6. In the present work ZnO which acts as a amphoteric oxide is synthesized in the laboratory and characterized by XRD and BET surface area. This was modified by metal impregnation using aqueous solutions of sodium and boron salts qualitatively and quantitatively. The samples were calcined in the muffle furnace and were subjected to XRD investigation to check formation of new inorganic phases on impregnation. The ZnO and modified ZnO catalysts were screened using a downflow integral laboratory reactor at identical experimental parameters at atmospheric pressure. The effect of temperature, flow rate and type and quantity of metal loading on activity and selectivity of the title reaction studied. Activation energy, thermodynamic properties of parent and modified catalysts are evaluated. A rate equation has been applied. The inorganic phases responsible for dehydration and dehydrogenation of cyclohexanol are identical using JCPDS diffraction files.

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