Abstract
The effect of catalyst deactivation in the plasma catalysis of methanol decomposition is investigated. A dielectric barrier discharge is generated in the Cu/ZnO/γ-Al2O3 catalyst-packed bed reactor. Methanol conversion and generation of CO/CO2 and HC species using the fresh and deactivated catalyst are compared. Catalyst deactivation usually causes a reduction in the synergetic effect of the plasma and catalyst, mainly as a result of changes in the relative generation of primary radicals by the plasma and subsequent interactions between the catalyst-adsorbed and plasma-generated species. The results show that deactivation and changes in catalyst characteristics, as well as active control of the plasma generation technique, can be the controlling parameters in the kinetics of plasma–catalyst reactions.
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