New method of synthesis of hierarchical mordenite of high crystallinity and its application in hydroizomerization of benzene-n-heptane mixture

A new approach to the formation of hierarchical porous structure of mordenite without use of templates is suggested in the presented work. The method is based on the crystallization of mordenite in granules consisting of amorphous aluminosilicate (metakaolin), fumed silica and mordenite crystals, pr...

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Bibliographic Details
Published in:Journal of porous materials 2019-08, Vol.26 (4), p.995-1004
Main Authors: Travkina, O. S., Agliullin, M. R., Kuvatova, R. Z., Pavlova, I. N., Narender, Nama, Kutepov, B. I.
Format: Article
Language:English
Subjects:
Aluminosilicates
Aluminum silicates
Ammonia
Amorphous materials
Benzene
Catalysis
Characterization and Evaluation of Materials
Chemical industry
Chemistry
Chemistry and Materials Science
Crystal structure
Crystallinity
Crystallization
Heptanes
Hydrocarbons
Isomers
Metakaolin
Physical Chemistry
Platinum
Selectivity
Silica fume
Silicon dioxide
Structural hierarchy
Zeolites
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Summary:A new approach to the formation of hierarchical porous structure of mordenite without use of templates is suggested in the presented work. The method is based on the crystallization of mordenite in granules consisting of amorphous aluminosilicate (metakaolin), fumed silica and mordenite crystals, provided that the crystalline phase content must be higher than that of the amorphous phase. The synthesized material is characterized by high crystallinity (up to 92%) with the volume of micro-, meso- and macro-pores of 0.15, 0.20 and 0.18 cm 3 /g, respectively. The research results showed that MOR type zeolite with a hierarchical structure in the H-form has total acidity in ammonia of about 860 µmol/g and after promotion of 0.3% wt platinum exhibits high activity and selectivity in the hydroisomerization of a model mixture of benzene–heptane into methylcyclopentane and isomers of n-heptane.
ISSN:1380-2224
1573-4854
DOI:10.1007/s10934-018-0694-0