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Low-temperature thermal removal of template from high silica ZSM-5. Catalytic effect of zeolitic framework

  1. 1.
    SYSNO ASEP0348362
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleLow-temperature thermal removal of template from high silica ZSM-5. Catalytic effect of zeolitic framework
    Author(s) Jirka, Ivan (UFCH-W) RID, ORCID
    Sazama, Petr (UFCH-W) RID, ORCID
    Zikánová, Arlette (UFCH-W) RID
    Hrabánek, Pavel (UFCH-W) RID
    Kočiřík, Milan (UFCH-W) RID, ORCID
    Source TitleMicroporous and Mesoporous Materials. - : Elsevier - ISSN 1387-1811
    Roč. 137, 1-3 (2011), s. 8-17
    Number of pages10 s.
    Languageeng - English
    CountryNL - Netherlands
    KeywordsTPA+ decomposition ; spatial distribution of organics ; Al, Fe dopants
    Subject RIVCF - Physical ; Theoretical Chemistry
    R&D ProjectsGA203/07/1443 GA ČR - Czech Science Foundation (CSF)
    CEZAV0Z40400503 - UFCH-W (2005-2011)
    UT WOS000284557000002
    DOI10.1016/j.micromeso.2010.08.015
    AnnotationTopochemical and catalytic effects of ZSM-5 zeolite framework in the course of thermal degradation of tetrapropyl ammonium (TPA+) template upon calcination under oxidative (air) and inert (nitrogen, N2) atmosphere was analyzed using elemental analysis, X-ray Photoelectron Spectroscopy (XPS) and absorption UV–Vis–NIR spectroscopy. It has been demonstrated that template residues were selectively removed from the interior of the crystals. The concentration of (N (C)-containing template species was less-than-or-equals, slant1 atom per unit cell (u.c.)) by prolonged (24 h) calcination in air already at temperature Tmax = 310 °C (N-containing template species) and Tmax = 330 °C (C-containing template species). Calcination in N2 requires temperatures higher by about 20 °C. The surface region of ZSM-5 crystals contained, however, a substantial amount of template residua (20–30% of N-containing and not, vert, similar60% of C-containing species) even at Tmax = 430 °C.
    WorkplaceJ. Heyrovsky Institute of Physical Chemistry
    ContactMichaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
    Year of Publishing2011
Number of the records: 1  

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