Resumo

VOLL, F.A.P.; PALU, F.  e  SANTOS, J.B.O.. Influence of catalyst treatments on the decomposition of hydrogen peroxide on supported palladium catalysts. Lat. Am. appl. res. [online]. 2011, vol.41, n.4, pp.305-310. ISSN 0327-0793.

The decomposition of hydrogen peroxide was studied on Pd catalysts between 293 K and 313 K. The apparent activation energy value was calculated for all the catalysts and it varied between 27 and 55 kJ/mol. For all the catalysts tested, treatment with hydrogen resulted in a significant increase in the reaction rate, as well as a decrease in the apparent activation energy for the reaction. All the reactions were well represented by a first order rate law with respect to H₂O₂. The effect of the treatment with H₂O₂ was studied in successive reactions without catalyst exchange. A small deactivation was observed in the 5.0% Pd/AC and 0.5% Pd/AC catalysts after four H₂O₂ decomposition reactions.

Palavras-chave : Hydrogen peroxide; Palladium Catalyst; Decomposition; Kinetics.

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