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

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• 作者：Raymond H. Archer ; John R. Carpenter ; Son-Jong Hwang ; Allen W. Burton ; Cong-Yan Chen ; Stacey I. Zones ; Mark E. Davis
• 刊名：Chemistry of Materials
• 出版年：2010
• 出版时间：April 27, 2010
• 年：2010
• 卷：22
• 期：8
• 页码：2563-2572
• 全文大小：1015K
• 年卷期：v.22,no.8(April 27, 2010)
• ISSN：1520-5002

文摘

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), p>29p>Si 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.