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1 Polish Journal of Chemistry

1 2003

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Catalytic Combustion of Trichloroethylene over Pd-Doped Ti-Pillared Montmorillonites

Bahranowski K., Gaweł A., Janik R., Komorek J., Machej T., Michalik A., Serwicka E., Włodarczyk W.

Polish Journal of Chemistry

2003

Vol. 77 / nr 5

675-682

Palladium (0.8 wt.%) was introduced onto Ti-pillared montmorillonite samples by means of incipient wetness technique either before or after calcination of the pillared matrix. Combustion of trichloroethylene (TCE) has been chosen to test the catalytic properties of clay catalysts in deep oxidation of chlorinated volatile organics. The results were referred to the performance of a commercial catalyst. Both materials based on pillared clays were more active than the reference sample. The clay sample doped after calcination was better of the two and gave complete combustion of TCE at temperature by 100 K lower than the commercial catalyst. This material showed also the highest selectivity to HCl at maximum TCE conversion. Further improvement of the clay catalyst performance in terms of the HCl yield and suppression of chlorine evolution was achieved by addition of the methanol vapour to the reaction mixture. The results are discussed in terms of textural and acidic properties of the investigated catalysts.