Physicochemical Properties and Catalytic Behavior of the Molecular Sieve SSZ-70

SSZ-70 is synthesized using 1,3-bis(isobutyl)imidazolium, 1,3-bis(cyclohexyl)imidazolium, and 1,3-bis(cycloheptyl)imidazolium structure directing agents (SDAs), and the solids obtained are characterized by powder X-ray diffraction (XRD), 29Si magic angle spinning nuclear magnetic resonance (MAS NMR)...

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Bibliographic Details
Published in:Chemistry of materials 2010-04, Vol.22 (8), p.2563-2572
Main Authors: Archer, Raymond H, Carpenter, John R, Hwang, Son-Jong, Burton, Allen W, Chen, Cong-Yan, Zones, Stacey I, Davis, Mark E
Format: Article
Language:English
Subjects:
Catalysis and Catalysts
Porous Materials (including Meso- and Micro-Porous Materials)
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Summary:SSZ-70 is synthesized using 1,3-bis(isobutyl)imidazolium, 1,3-bis(cyclohexyl)imidazolium, and 1,3-bis(cycloheptyl)imidazolium structure directing agents (SDAs), and the solids obtained are characterized by powder X-ray diffraction (XRD), 29Si magic angle spinning nuclear magnetic resonance (MAS NMR), electron microscopy, nitrogen and hydrocarbon adsorption, and thermogravimetric analyses. The physicochemical properties of SSZ-70 show that it is a new molecular sieve that has similarities to MWW-type materials. The catalytic behavior of SSZ-70 is evaluated through the use of the constraint index (CI) test. Distinct differences in the reactivity between Al-SSZ-70 and SSZ-25 (MWW) are observed and are the consequences of the structural differences between these two molecular sieves.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm9035677