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Low-temperature thermal removal of template from high silica ZSM-5. Catalytic effect of zeolitic framework
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SYSNO ASEP 0348362 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Low-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, ORCIDSource Title Microporous and Mesoporous Materials. - : Elsevier - ISSN 1387-1811
Roč. 137, 1-3 (2011), s. 8-17Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords TPA+ decomposition ; spatial distribution of organics ; Al, Fe dopants Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/07/1443 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000284557000002 DOI 10.1016/j.micromeso.2010.08.015 Annotation Topochemical 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. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
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