Structural and diffusion characterizations of steam-stable mesostructured zeolitic UL-ZSM-5 materials

Langmuir : the ACS Journal of Surfaces and Colloids
Hoang Vinh-ThangSerge Kaliaguine

Abstract

A series of mesoporous UL-ZSM-5 materials (Si/Al = 50) with different micro- and mesoporosity as well as crystallinity was prepared following the procedure proposed in one of our recent studies (Trong-On, D.; Kaliaguine, S. Angew. Chem. Int. Ed. 2001, 40, 3248-3251. Trong-On, D.; Kaliaguine, S. U.S. Patent 6,669,924, B1, 2003). These materials have zeolitic structure in the form of nanoparticles intergrown in the walls of the amorphous wormhole-like aluminosilicate mesopores of Al-Meso-50, which was used as a precursor in the synthesis. The structure, crystallinity, and textural properties of the synthesized materials, as well as a reference ZSM-5 zeolite sample, were determined by X-ray diffraction (XRD), transmission electron microscopy (TEM)/scanning electron microscoy (SEM) analyses, Fourier transform infrared spectroscopy (FTIR), 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR), and nitrogen adsorption/desorption techniques. The acid properties were examined by FTIR of adsorbed pyridine. UL-ZSM-5 materials were shown to be highly hydrothermally stable. The diffusion of two C7 hydrocarbons, i.e., n-heptane and toluene, in four UL-ZSM-5 materials with different microporosities, related acidities, and crystall...Continue Reading

References

Dec 20, 2002·Angewandte Chemie·Do Trong On, Serge Kaliaguine
Jan 16, 2003·Journal of the American Chemical Society·Do Trong On, Serge Kaliaguine
Feb 7, 2003·Physical Review Letters·Suresh K Bhatia, David Nicholson
Oct 4, 2003·Physical Review Letters·Owen G JeppsDebra J Searles
May 18, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Hoang Vinh-ThangSerge Kaliaguine
Sep 3, 2001·Angewandte Chemie·Do Trong On, Serge Kaliaguine

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Citations

Apr 4, 2013·Chemical Reviews·Hoang Vinh-Thang, Serge Kaliaguine
Jun 20, 2007·Chemistry, an Asian Journal·Jia Hui XuJian Hua Zhu

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