About: FTIR and (27)Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons

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About: FTIR and (27)Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A series of micro- and micro-mesoporous H-ZSM-5 zeolites with highly regular and, on the other side, a defective framework were prepared by synthesis and post-synthesis treatment, and their activity was investigated in transformation of methanol to low olefins, aromatics and paraffins. (27)Al MAS NMR and FTIR spectroscopy of OH groups and C N groups of adsorbed d(3)-acetonitrile were used for analysis of the population of framework Al- and Si-related defective sites. Beside framework Al atoms in regular Td coordination, perturbed Td coordinated Al atoms and partly extra-framework Al species, and the internal Si-OH groups as Si-related defects were identified. The increase in the concentration of framework Al- and Si-defective sites in microporous H-ZSM-5 was manifested in methanol transformation in the increased yields of aromatics and paraffins, while highly regular framework preferred formation of low C(2) and C(3) olefins. The non-defective micro-mesoporous H-ZSM-5 prepared by alkaline and subsequent oxalic acid leaching of the zeolite with silanols typical for external crystal surface gave substantially longer catalyst life-time. A series of micro- and micro-mesoporous H-ZSM-5 zeolites with highly regular and, on the other side, a defective framework were prepared by synthesis and post-synthesis treatment, and their activity was investigated in transformation of methanol to low olefins, aromatics and paraffins. (27)Al MAS NMR and FTIR spectroscopy of OH groups and C N groups of adsorbed d(3)-acetonitrile were used for analysis of the population of framework Al- and Si-related defective sites. Beside framework Al atoms in regular Td coordination, perturbed Td coordinated Al atoms and partly extra-framework Al species, and the internal Si-OH groups as Si-related defects were identified. The increase in the concentration of framework Al- and Si-defective sites in microporous H-ZSM-5 was manifested in methanol transformation in the increased yields of aromatics and paraffins, while highly regular framework preferred formation of low C(2) and C(3) olefins. The non-defective micro-mesoporous H-ZSM-5 prepared by alkaline and subsequent oxalic acid leaching of the zeolite with silanols typical for external crystal surface gave substantially longer catalyst life-time. (en)
Title	FTIR and (27)Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons FTIR and (27)Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons (en)
skos:prefLabel	FTIR and (27)Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons FTIR and (27)Al MAS NMR analysis of the effect of framework Al- and Si-defects in micro- and micro-mesoporous H-ZSM-5 on conversion of methanol to hydrocarbons (en)
skos:notation	RIV/61388955:_____/11:00372239!RIV12-GA0-61388955
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GP203/08/P593), P(IAA400400812), P(IAA400400904), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Wichterlová, Blanka Sklenák, Štěpán Tvarůžková, Zdenka Sazama, Petr Dědeček, Jiří Musilová, Zuzana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	200469
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/11:00372239
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	micro-mesoporous H-ZSM-5 zeolite; framework defects; FTIR (en)
http://linked.open.../riv/klicoveSlovo	framework defects micro-mesoporous H-ZSM-5 zeolite FTIR
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[37C9A12D7ED2]
http://linked.open...i/riv/nazevZdroje	Microporous and Mesoporous Materials
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Analysis of Al sites in the framework of zeolites and catalytic activity of correspondink H+ and Fen+ sites Quantum chemistry investigation of inorganic crystalline micro- and mesoporous catalytic systems NMR crystallography of extraframework sites in silicon rich zeolites
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	143
http://linked.open...iv/tvurceVysledku	Dědeček, Jiří Musilová, Zuzana Sazama, Petr Sklenák, Štěpán Tvarůžková, Zdenka Wichterlová, Blanka Gonsiorová, O. Palumbo, L.
http://linked.open...ain/vavai/riv/wos	000291524700013
http://linked.open...n/vavai/riv/zamer	Struktura, reaktivita a dynamika molekulárních a biomolekulárních systémů: teorie, experiment, aplikace
issn	1387-1811
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.micromeso.2011.02.013

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