Effect of water on cobalt speciation during solid-state synthesis of Co2+/ZSM5 catalysts : Quantitative study by TPR and XAS
Identifieur interne : 000881 ( Main/Curation ); précédent : 000880; suivant : 000882Effect of water on cobalt speciation during solid-state synthesis of Co2+/ZSM5 catalysts : Quantitative study by TPR and XAS
Auteurs : Hanene Ben Boubaker [Tunisie] ; Mourad Mhamdi [Tunisie] ; Eric Marceau [France] ; Sihem Khaddar-Zine [Tunisie] ; Abdelhamid Ghorbel [Tunisie] ; Michel Che [France] ; Younès Ben Taarit [France] ; Francoise Villain [France]Source :
- Microporous and mesoporous materials [ 1387-1811 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Eau, Cobalt, Analyse quantitative.
English descriptors
- KwdEn :
Abstract
The effect of water on cobalt speciation in the synthesis of Co2+/ZSMS catalysts is quantitatively studied by the combined use of macroscopic and local characterization techniques, TPR and X-ray absorption spectroscopies, respectively. The addition of a small quantity of water to cobalt acetate and zeolite during the preparation of Co2+/ZSM5 by solid-state reaction favors cobalt dispersion and migration into the zeolite. It also inhibits the formation of extraframework phases (Co3O4 particles, cobalt phyllosilicate). Dissociation of solid cobalt acetate upon contact with water is thought to be the driving force for enhanced cobalt migration into the zeolite.
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<series><title level="j" type="main">Microporous and mesoporous materials</title>
<title level="j" type="abbreviated">Microporous mesoporous mater.</title>
<idno type="ISSN">1387-1811</idno>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Catalyst</term>
<term>Cobalt</term>
<term>Heterogeneous catalysis</term>
<term>Quantitative analysis</term>
<term>Solid state</term>
<term>Solid state reaction</term>
<term>Synthesis</term>
<term>Water</term>
<term>Zeolite</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Eau</term>
<term>Cobalt</term>
<term>Etat solide</term>
<term>Synthèse</term>
<term>Zéolite</term>
<term>Catalyseur</term>
<term>Réaction état solide</term>
<term>Analyse quantitative</term>
<term>Catalyse hétérogène</term>
<term>Zéolite ZSM5</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Eau</term>
<term>Cobalt</term>
<term>Analyse quantitative</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">The effect of water on cobalt speciation in the synthesis of Co<sup>2+</sup>
/ZSMS catalysts is quantitatively studied by the combined use of macroscopic and local characterization techniques, TPR and X-ray absorption spectroscopies, respectively. The addition of a small quantity of water to cobalt acetate and zeolite during the preparation of Co<sup>2+</sup>
/ZSM5 by solid-state reaction favors cobalt dispersion and migration into the zeolite. It also inhibits the formation of extraframework phases (Co<sub>3</sub>
O<sub>4</sub>
particles, cobalt phyllosilicate). Dissociation of solid cobalt acetate upon contact with water is thought to be the driving force for enhanced cobalt migration into the zeolite.</div>
</front>
</TEI>
</record>
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