Solvent-free aerobic oxidation of ethylbenzene over supported Ni catalysts using molecular oxygen at atmospheric pressure |
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Authors: | G Raju P Shiva Reddy J Ashok B Mahipal Reddy A Venugopal |
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Institution: | Catalysis & Physical Chemistry Division, Indian Institute of Chemical Technology, Tarnaka, Hyderabad-500 607, India |
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Abstract: | We investigated the aerobic oxidation of ethylbenzene in the absence of solvent or any additive carded out over Ni on difierent types of supports namely SiO2,hydroxyapatite,SBA-15,and USY Zeolites.The oxidation of ethylbenzene activities was measured in a round bottom flask immersed in oil bath at known reaction temperature.The physicochemical characteristics of the catalysts were examined by BET surface area.XRD.FT-IR and the oxidation activities were correlated with the acidities of the catalysts obtained bv TPD of NH3.It was observed that both hydroxyapatite and USY(13%Na2O)supported Ni catalysts displayed higher ethylbenzene conversion and 80%selectivity towards acetophenone. |
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Keywords: | nickel SBA-15 zeolites hydroxyapatite ethylbenzene oxidation TPD of NH3 |
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