Physicochemical Properties and Catalytic Behavior of the Molecular Sieve SSZ-70
2010; American Chemical Society; Volume: 22; Issue: 8 Linguagem: Inglês
10.1021/cm9035677
ISSN1520-5002
AutoresRaymond H. Archer, John Carpenter, Son‐Jong Hwang, Allen W. Burton, Cong-Yan Chen, Stacey I. Zones, Mark E. Davis,
Tópico(s)Mesoporous Materials and Catalysis
ResumoSSZ-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.
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