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Fast Catalytic Oxidation Of Phenol Over Modified Zeolite L Nanocrystals, Eng-Poh Ng Dr.
Fast Catalytic Oxidation Of Phenol Over Modified Zeolite L Nanocrystals, Eng-Poh Ng Dr.
Eng-Poh Ng
Iron modified zeolite L nanocrystals (Fe/KL) were synthesized hydrothermally by the incorporation of Fe3+ in zeolite L lattice. XRD results showed an increase in the inter-planar spacing and lattice parameters. Transition characteristic of the tetrahedral Fe3+ species were observed in the UV–Vis spectrum. The oxidation of phenol in the presence of acetic acid over Fe/KL gave 93.40% conversion in 30 min with selective formation of 77.47% catechol and 22.53% hydroquinone. The catalytic activity was significantly enhanced by the addition of acetic acid. It was found that the acetic acid was oxidized by hydrogen peroxide to form peracetic acid, which served …