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Characterization and catalytic activity of nickel-zeolite catalysts. I. Reduction properties of nickel ions in zeolites

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

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

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โœฆ Synopsis

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, whereas the degrees of nickel reduction in NiH-Y and NiH-M were slight. It was assumed that the reducibilities were mainly affected by both the occupying sites of nickel ions and the acidic hydroxyl groups in zeolites.

๐Ÿ“œ SIMILAR VOLUMES

Characterization and catalytic activity
Characterization and catalytic activity of nickel-zeolite catalysts. II. Effects of hydroxyl groups on reduction of nickel ions in mordenites
โœ Minoru Suzuki; Kazuo Tsutsumi; Hiroshi Takahashi ๐Ÿ“‚ Article ๐Ÿ“… 1982 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 627 KB

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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 w

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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