SOME CHARACTERISTICS OF TRANSITION-METAL CONTAINING Y-ZEOLITE IN CO HYDROGENATION

Abstract

The cobalt-containing Y-zeolite catalysts were prepared by excess water (EW), ion-exchange (IE) and carbonyl impregnation (CI) methods. The activity and selectivity in CO hydrogenation is explained in terms of the acidity modification and metal distribution. Characterization by electron paramagnetic and ferromagnetic resonance spectroscopy and TPSR was in good agreement with the catalytic property. Temperature programmed surface reaction (TPSR) for methane formation is proposed as a tool to determine the location of metal species, especially in CI catalysts.