Catalytic decomposition of potassium monopersulfate: influence of variables

摘要

Potassium monopersulfate has been decomposed inaqueous solution in the presence of Co(II). The effect of the mainoperating variables has been assessed. Minimum variations in pHexert 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.