On the Nature of Active Sites for Dehydrogenation of Saturated Hydrocarbons in HZSM-5 Zeolites Modified by Zinc and Gallium Oxides

On the Nature of Active Sites for Dehydrogenation of Saturated Hydrocarbons in HZSM-5 Zeolites Modified by Zinc and Gallium Oxides Full article

Journal

Studies in Surface Science and Catalysis
ISSN: 0167-2991

Output data

Year: 1989, Volume: 49, Pages: 1173-1182 Pages count : 10 DOI: 10.1016/s0167-2991(08)62003-0

Authors

Kazansky V.B. ¹ , Kustov L.M. ¹ , Khodakov A.Yu. ¹

Affiliations

1	N.D. Zelinsky Institute of Organic Chemistry, Academy of Sciences of the USSR, Moscow, V-334, Leninsky prosp. 47 (USSR)

HZSM-5 zeolites modified by zinc or gallium oxides were investigated using highly sensitive diffuse reflectance IR and ESR spectroscopic methods. Modification resulted in formation of strong Lewis acidic sites. For Zn-containing pentasils the Lewis acid-base pairs of Zn-O type localized in the channels were found to be the centres of strong polarization of H-H and C-H bonds as well as the active sites for dehydrogenation and aromatization of saturated hydrocarbons. In Ga-modified zeolites the strong Lewis acidic sites were localized on the external surface of microcrystallites.

Kazansky V.B. , Kustov L.M. , Khodakov A.Y.
On the Nature of Active Sites for Dehydrogenation of Saturated Hydrocarbons in HZSM-5 Zeolites Modified by Zinc and Gallium Oxides
Studies in Surface Science and Catalysis. 1989. V.49. P.1173-1182. DOI: 10.1016/s0167-2991(08)62003-0 OpenAlex

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