Com a series of vanadium incorporated rice husk

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Unformatted text preview: ir catalytic performance was tested in the oxidation 5+ of acetophenone at 70 °C. RH-10V (10 % V ) was found to be the most efficient catalyst in the oxidation of acetophenone (36.28 % conversion) yielding 2-hydroxyacetphenone, benzoic acid 3 hydroxyacetophenone, phenol and ethanoic acid as products. 5+ 158 3rd ICYC 2010 Universiti Sains Malaysia MAT-P10 23rd-25th June 2010 COBALT INCORPORATED SILICA CATALYST FOR THE OXIDATION OF PHENOL Jeyashelly Andas, Farook Adam and Ismail Ab. Rahman School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] Highly mesoporous cobalt incorporated rice husk silica catalyst with 5-20 wt. % metal loading was synthesized via a cheap solvent extraction and sol-gel technique under benign condition. The resultant heterogeneous catalysts were characterized by several analytical and spectroscopic techniques. TEM analysis of RH-15Co and RH-20Co revealed the presence of cobalt nanoparticles. The prepared catalysts were evaluated in the oxidation of phenol employing aqueous H 2O2 as the oxidant and water as the solvent. The oxidation yielded only Catechol (CAT) and Hydroquin one (HQ). RH-10Co was found to be superior in the oxidation of phenol yielding 82.5 % conversion. Further increase in the cobalt loading (>10 wt. %) reduced the phenol conversion. The catalyst was stable over leaching and can be regenerated without significant loss for several cycles. MAT-P11 THE PREPARATION AND CHARACTERIZATION OF CrAg BIMETALLIC HETEROGENEOUS CATALYST FOR THE OXIDATION OF n-HEPTANE Arvin Ramasanthiran and Farook Adam School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] RHA-5Ag, RHA-5Cr and RHA-5Cr5Ag were synthesized from rice husk ash silica (RHA) via sol-gel technique. TEM results of all the catalysts showed an orderly arrangement of pores. FTIR and EDX analysis confirmed the presence of Ag and/or Cr in all the synthesized catalysts. The prepared catalysts were evaluated in the oxidation of n-heptane in the presence of H 2O2 as the oxidant and acetonitrile as the solvent at 80 °C. Catalytic performa...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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