Dynamic Hydrothermal Synthesis of a b-Oriented MFI Zeolite Film
نویسندگان
چکیده
منابع مشابه
TEM investigation of formation mechanism of monocrystal-thick b-oriented pure silica zeolite MFI film.
The first direct transmission electron microscopic (TEM) observation has been carried out on the continuous monocrystal-thick b-oriented pure silica zeolite MFI films produced by in situ crystallization. The self-supporting film samples for TEM study were fabricated by dissolving the steel substrate with acid. This TEM study is free of those artifacts that are typically associated with TEM samp...
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Ultrathin MFI-zeolite nanosheets can be packed on porous supports to create molecular sieve membranes. The nanosheets on porous support reduce morphological damage seen in regular MFIzeolite crystals [1]. MFI-zeolite belongs to pentasil family of zeolites where the periodic building unit (PerBU) is composed of 12 interconnected SiO4 tetrahedral (T12) units of 41m2 (D2d) symmetry [2]. Rotation o...
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A new route to the synthesis of highly b-oriented zeolite MFI films is demonstrated for the first time using ammonium salts as crystallization-mediating agents in secondary growth. The ammonium salts tailor the crystallization process and silicate-NH4(+) interactions dominate over TPA-NH4(+) interactions so that nucleation was effectively suppressed during secondary growth.
متن کاملFabrication of highly b-oriented MFI monolayers on various substrates.
By surface modification of MFI microcrystals with sec-butanol and pre-coating the substrate with a temporary water layer, a convenient process is developed to directly assemble anisotropic MFI microcrystals into highly b-oriented monolayers on various substrates with different surface conditions.
متن کاملCa-modified MFI zeolite: A study on its synthesis, characterization and catalytic activity
Using hydrothermal synthesis process a series of Mobil Five (MFI) zeolites were synthesized with silica to alumina ratio (SAR) of 50, 100 and 200. The synthesized MFI zeolites were used to exchange with 0.5%, 1.0% and 2.0% Ca(NO3)2 solutions for modification of MFI zeolites to Ca-MFI zeolite. The formation of MFI zeolite phases was identified by XRD and FT-IR analysis. TGA...
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ژورنال
عنوان ژورنال: Chinese Journal of Catalysis
سال: 2011
ISSN: 1872-2067
DOI: 10.1016/s1872-2067(10)60167-2