Catalytic activity of H-forms of zeolites in the isomerization of supercritical n-pentane and their physicochemical properties

Catalytic activity of H-forms of zeolites in the isomerization of supercritical n-pentane and their physicochemical properties Full article

Journal

Kinetics and Catalysis
ISSN: 1608-3210 , E-ISSN: 0023-1584

Output data

Year: 2010, Volume: 51, Number: 5, Pages: 736-742 Pages count : 7 DOI: 10.1134/s0023158410050162

Authors

Bogdan V.I. ¹ , Koklin A.E. ¹ , Kazanskii V.B. ¹

Affiliations

1	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia

The acidic properties of the H-forms of zeolites ZSM-5, Beta, Y, and mordenite are studied by diffuse reflectance IR spectroscopy using n-pentane as a probe molecule. The decreasing order of Brønsted acid site strengths is constructed. The isopentane selectivity in n-pentane isomerization under supercritical conditions (260°C, 130 atm) increases in the order H-ZSM-5 < H-Beta < H-mordenite(11) ≈ H-Y with decreasing strength of Brønsted sites. Catalytic data are analyzed jointly with the results of physicochemical studies of H-mordenite (temperature-programmed ammonia desorption, benzene adsorption, and IR spectroscopy). Under the supercritical conditions, the conversion of n-pentane on mordenite is determined by the total acidity of the zeolite and also by the accessibility of the acid sites inside the zeolite channels to the reactant.

Bogdan V.I. , Koklin A.E. , Kazanskii V.B.
Catalytic activity of H-forms of zeolites in the isomerization of supercritical n-pentane and their physicochemical properties
Kinetics and Catalysis. 2010. V.51. N5. P.736-742. DOI: 10.1134/s0023158410050162 WOS Scopus OpenAlex

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