2005•Journal of Jilin UniversityRequires access
Characterization and Ethane Ammoxidation Property of Cobalt Ion-exchanged H-and Na-Form ZSM-5 Zeolites
Weicheng Pan
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Abstract
Various Co-HZSM-5 and Co-NaZSM-5 zeolites,prepared by means of liquid-phase ion-exchange method,were characterized by means of NH_3-TPD,IR,UV-Vis and H_2-TPR for studying the relationship(between) the acid-base or redox properties and the catalytic ammoxidation performance of ethane.For both types of Na-and H-ZSM-5,the introduction of Co~(2+) cations results in the formation of two new types of Lewis acid sites.The presence of co-cations(i.e.H~+ and Na~+) has a great effect on the redox properties of Co~(2+) ions,thus influencing the catalytic activity and selectivity for the reaction of ethane ammoxidation.