Abstract
The catalytic oxidation of propylene over copper(II)-exchanged X and Y zeolites in the presence of the different major cocations, Mg 2+ , Ca 2+ , Li + , Na + , K + , and H + , was studied as a function of the oxygen/propylene mole ratio in a flow system at 350°C. The catalytic activities and the changes in cupric ion species were studied by gas chromatography and electron spin resonance. The catalytic activity for this reaction is shown to be due to copper species and is greatly dependent on the type of major cocation in the zeolites
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