Abstract
We have reported earlier that modification of commercial graphite Pt-supported catalysts with Teflon fluorinated polymeric coating of a very strong hydrophobic nature can significantly improve catalytic activity for aerial oxidation of water-insoluble alcohols such as anthracene methanol in supercritical carbon dioxide (scCO 2). Thus, this paper presents some further characterization of these new catalyst materials and the working fluid phase during the catalysis. Using the same Teflon-modified metal catalysts, this paper addresses the oxidation of another water-insoluble alcohol molecule, m- hydrobenzoin in scCO 2. It is found that conversion and product distribution of this diol oxidation critically depend on the temperature and pressure of the scCO 2 used, which suggest the remarkable solvent properties of the scCO 2 under these unconventional oxidation conditions.
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