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Characterization and catalytic activity of nickel-zeolite catalysts. IV. Effects of support on dispersion of nickel and catalytic activity

โœ Scribed by Minoru Suzuki; Kazuo Tsutsumi; Hiroshi Takahashi

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
646 KB
Volume
2
Category
Article
ISSN
0144-2449

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โœฆ Synopsis

The dispersion states of reduced nickel on zeolites and their activities were studied on a series of nickel-zeolites A, X, Y and nickel-mordenites. The dispersion of nickel was affected by the types of zeolite support, and increased in the order; NiNa-Y < NiNa-X < NiNa-M NiNa-A. The reduced nickel was highly dispersed in NiSr-A, NiCa-A and NiBa-A. All sites active to hydrogen chemisorption act as sites for the hydrogenolysis of ethane in nickelzeolites A, X and Y.

๐Ÿ“œ SIMILAR VOLUMES

Characterization and catalytic activity
Characterization and catalytic activity of nickel-zeolite catalysts. III. Effects of parent-cations on dispersion of nickel and activity of benzene hydrogenation
โœ Minoru Suzuki; Kazuo Tsutsumi; Hiroshi Takahashi ๐Ÿ“‚ Article ๐Ÿ“… 1982 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 753 KB

A series of nickel-zeolite catalysts with alkaline earth, lanthanum and hydrogen ions as parent-cations in zeolite Y were prepared. The degrees of nickel ion reduction and the dispersion states of reduced nickel were affected by the extent of nickel-exchange and by the types of parent-cations in zeo

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Nickel-zeolite Y of various parent cation types, NiNa-A and NiNa-M were prepa'red. The reducibilities of nickel ions in these zeolites were evaluated by hydrogen consumption measurement. The nickel ions were reduced markedly by hydrogen in NiCa-Y, NiSr-Y and NiBa-Y in contrast to that of NiNa-Y, whe

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Characterization and catalytic activity of nickel-zeolite catalysts. II. Effects of hydroxyl groups on reduction of nickel ions in mordenites
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A series of nickel, hydrogen-mordenites including various amounts of hydroxyl groups were prepared, and the effects of the hydroxyl groups on the degree of nickel reduction were studied. The reducibility of nickel ions decreased with the increase of acidic hydroxyl groups in mordenites. The effect o