The catalytic activity and selectivity of monovalent Y-zeolites for n-butene isomerization

The catalytic activity of Na, H-Y zeolite samples with a varying Si/Al ratio (2·5 to 20) in the transformation of methanol was determined. The amounts of formed individual aliphatic hydrocarbons as function of reaction time were correlated with the amount of Bronsted and Lewis centres on the catalysts. The effect of coke formation on the over-all course of the reaction has been demonstrated.

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Catalytic activity of differently prepared, fully exchanged lanthanum Y zeolites

Zeolites ◽

10.1016/s0144-2449(88)80312-9 ◽

1988 ◽

Vol 8 (3) ◽

pp. 228-231 ◽

Cited By ~ 12

Author(s):

David Keir ◽

Edward F.T. Lee ◽

Lovat V.C. Rees

Keyword(s):

Catalytic Activity ◽

Y Zeolites

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ChemInform Abstract: CHARACTERIZATION AND CATALYTIC ACTIVITY OF NICKEL(2+)-EXCHANGED X AND Y ZEOLITES. II. REDUCIBILITY OF NI2+ BY LOW-MOLECULAR-WEIGHT OLEFINS AND THE DIMERIZATION ACTIVITY OF THE NI2+-ZEOLITES

Chemischer Informationsdienst ◽

10.1002/chin.198532031 ◽

1985 ◽

Vol 16 (32) ◽

Author(s):

A. BARTH ◽

J. HOFFMANN

Keyword(s):

Molecular Weight ◽

Catalytic Activity ◽

Low Molecular Weight ◽

Y Zeolites ◽

Abstract Characterization

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Annihilation of the Catalytic Activity in Butene Isomerization of Porous Vycor Glass by Washing with EDTA Aqueous Solution

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.50.3411 ◽

1977 ◽

Vol 50 (12) ◽

pp. 3411-3412 ◽

Cited By ~ 8

Author(s):

Shoji Hirai ◽

Akira Morikawa ◽

Yoshio Ishinaga ◽

Kiyoshi Otsuka ◽

Yuji Wada

Keyword(s):

Aqueous Solution ◽

Catalytic Activity ◽

Vycor Glass ◽

Porous Vycor Glass ◽

Butene Isomerization

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Effect of Li, Na, K and Cs on Vacuum Decomposition of Tetraammineplatinum(II) in Zeolites. Catalytic Activity in CO + NO Reaction

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19950428 ◽

1995 ◽

Vol 60 (3) ◽

pp. 428-442 ◽

Cited By ~ 3

Author(s):

Jana Nováková ◽

Libor Brabec ◽

Ludmila Kubelková

Keyword(s):

Catalytic Activity ◽

Decomposition Rate ◽

Reaction Rate ◽

Hydrogen Reduction ◽

Pt Catalyst ◽

Y Zeolites ◽

Oxygen Layer ◽

Zeolite Structure ◽

X Zeolites ◽

Vacuum Decomposition

[Pt(NH3)4]2+ ions were exchanged for alkali (Li, Na, K and Cs) in -X and -Y zeolites and decomposed in vacuum. TPR after this decomposition showed that autoreduction accompanying this process reduced roughly 2/3 of all Pt2+ to Pt0. The extent of the autoreduction rose with the ammonia pressure over the zeolite. The decomposition rate increased with increasing electropositivity of the alkali ion and this effect completely overlapped that of the zeolite structure. The CO + NO reaction rate also increased from Li to Cs, but -X zeolites were substantially more active than the -Y ones. Oxygen layer on the resulting Pt catalyst affected positively the reaction rate. The dispersion of Pt particles was relatively low, when compared to that obtained by decomposition of the Pt tetraammine complex in oxygen followed by hydrogen reduction. However, the reaction rate was higher.

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