Catalytic decomposition of potassium monopersulfate: influence of variables

Borralho, Maria Teresa; Gimeno, Olga; Rivas, Javier; Carbajo, Maria

http://hdl.handle.net/10400.26/1550

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Authors

Borralho, Maria Teresa

Gimeno, Olga

Rivas, Javier

Carbajo, Maria

Abstract(s)

Potassium monopersulfate has been decomposed in aqueous solution in the presence of Co(II). The effect of the main operating variables has been assessed. Minimum variations in pH exert a considerable influence on the process kinetics. Thus, when no pH adjustment is considered, the actual effect of variables like initial monopersulfate and/or catalyst concentration may be hindered. As expected, temperature enhances the monopersulfate decomposition rate by following the Arrhenius law. The activation energy in the proximity of 85 kJ/mol has been obtained. Amongst the different solids tested in the monopersulfate decomposition, only the perovskite LaTi0.15Cu0.85O3 has shown a significant catalytic activity.