Synthesis, Structure, and Physicochemical and Catalytic Characterization of the Novel High-Silica Large-Pore Zeolite SSZ-42

✍ Scribed by Cong-Yan Chen; Larry W. Finger; Ronald C. Medrud; Charles L. Kibby; Peter A. Crozier; Ignatius Y. Chan; Thomas V. Harris; Larry W. Beck; Stacey I. Zones

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 424 KB
• Volume: 4
• Category: Article
• ISSN: 0947-6539
• DOI: 10.1002/(sici)1521-3765(19980710)4:7<1312::aid-chem1312>3.0.co;2-k

✦ Synopsis

The novel high-silica zeolite SSZ-42 was synthesized and characterized by X-ray diffraction, scanning electron micrographs, transmission electron micrographs, argon and hydrocarbon adsorption, elemental analysis, 13 C MAS NMR, FTIR, and catalytic reactions. The framework topology of SSZ-42 has been determined from X-ray diffraction data taken from a small single crystal (15 Â 15 Â 35 mm) and refined from powder diffraction data. The crystalline architecture is characterized by an undulating, one-dimensional 12membered T-atom ring (12-MR) channel system. This configuration is a sur-prise given that the measured adsorption capacity is much higher than expected for a one-dimensional channel system. The material is stable up to at least 800 8C under thermal and hydrothermal conditions, and exhibits many interesting characteristics and promises to be a useful catalyst for hydrocarbon processing.