CobaltMaghrebV1, Main, Exploration, bibRecord, 000881

Effect of water on cobalt speciation during solid-state synthesis of Co2+/ZSM5 catalysts : Quantitative study by TPR and XAS

Identifieur interne : 000881 ( Main/Exploration ); précédent : 000880; suivant : 000882

Effect 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.

RBID : Pascal:06-0410676

Descripteurs français

Pascal (Inist)
- Eau, Cobalt, Etat solide, Synthèse, Zéolite, Catalyseur, Réaction état solide, Analyse quantitative, Catalyse hétérogène, Zéolite ZSM5.
Wicri :
- topic : Eau, Cobalt, Analyse quantitative.

English descriptors

KwdEn :
- Catalyst, Cobalt, Heterogeneous catalysis, Quantitative analysis, Solid state, Solid state reaction, Synthesis, Water, Zeolite.

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.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000160
to stream PascalFrancis, to step Curation: 000135
to stream PascalFrancis, to step Checkpoint: 000171
to stream Main, to step Merge: 000891
to stream Main, to step Curation: 000881

Le document en format XML

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<author><name sortKey="Ben Taarit, Younes" sort="Ben Taarit, Younes" uniqKey="Ben Taarit Y" first="Younès" last="Ben Taarit">Younès Ben Taarit</name>
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<orgName type="university">Université Pierre-et-Marie-Curie</orgName>
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/ZSM5 catalysts : Quantitative study by TPR and XAS</title>
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<author><name sortKey="Khaddar Zine, Sihem" sort="Khaddar Zine, Sihem" uniqKey="Khaddar Zine S" first="Sihem" last="Khaddar-Zine">Sihem Khaddar-Zine</name>
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<author><name sortKey="Ben Taarit, Younes" sort="Ben Taarit, Younes" uniqKey="Ben Taarit Y" first="Younès" last="Ben Taarit">Younès Ben Taarit</name>
<affiliation wicri:level="3"><inist:fA14 i1="04"><s1>Institut de Recherches sur la Catalyse (UPR 5401 CNRS), 2 Avenue Albert Einstein</s1>
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<affiliation wicri:level="4"><inist:fA14 i1="05"><s1>Laboratoire de Chimie Inorganique et Matériaux Moléculaires (UMR 7071 CNRS), Université Pierre et Marie Curie, 4 place Jussieu</s1>
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<country>France</country>
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</affiliation>
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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>
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</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>
<affiliations><list><country><li>France</li>
<li>Tunisie</li>
</country>
<region><li>Auvergne-Rhône-Alpes</li>
<li>Gouvernorat de Tunis</li>
<li>Rhône-Alpes</li>
<li>Île-de-France</li>
</region>
<settlement><li>Orsay</li>
<li>Paris</li>
<li>Tunis</li>
<li>Villeurbanne</li>
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<orgName><li>Université Pierre-et-Marie-Curie</li>
</orgName>
</list>
<tree><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Ben Boubaker, Hanene" sort="Ben Boubaker, Hanene" uniqKey="Ben Boubaker H" first="Hanene" last="Ben Boubaker">Hanene Ben Boubaker</name>
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<name sortKey="Ghorbel, Abdelhamid" sort="Ghorbel, Abdelhamid" uniqKey="Ghorbel A" first="Abdelhamid" last="Ghorbel">Abdelhamid Ghorbel</name>
<name sortKey="Khaddar Zine, Sihem" sort="Khaddar Zine, Sihem" uniqKey="Khaddar Zine S" first="Sihem" last="Khaddar-Zine">Sihem Khaddar-Zine</name>
<name sortKey="Mhamdi, Mourad" sort="Mhamdi, Mourad" uniqKey="Mhamdi M" first="Mourad" last="Mhamdi">Mourad Mhamdi</name>
</country>
<country name="France"><region name="Île-de-France"><name sortKey="Marceau, Eric" sort="Marceau, Eric" uniqKey="Marceau E" first="Eric" last="Marceau">Eric Marceau</name>
</region>
<name sortKey="Ben Taarit, Younes" sort="Ben Taarit, Younes" uniqKey="Ben Taarit Y" first="Younès" last="Ben Taarit">Younès Ben Taarit</name>
<name sortKey="Che, Michel" sort="Che, Michel" uniqKey="Che M" first="Michel" last="Che">Michel Che</name>
<name sortKey="Che, Michel" sort="Che, Michel" uniqKey="Che M" first="Michel" last="Che">Michel Che</name>
<name sortKey="Villain, Francoise" sort="Villain, Francoise" uniqKey="Villain F" first="Francoise" last="Villain">Francoise Villain</name>
<name sortKey="Villain, Francoise" sort="Villain, Francoise" uniqKey="Villain F" first="Francoise" last="Villain">Francoise Villain</name>
</country>
</tree>
</affiliations>
</record>

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Effect of water on cobalt speciation during solid-state synthesis of Co2+/ZSM5 catalysts : Quantitative study by TPR and XAS

Effect of water on cobalt speciation during solid-state synthesis of Co2+/ZSM5 catalysts : Quantitative study by TPR and XAS

Source :

Descripteurs français

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Abstract

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