Influence of the cobalt salt precursors on the cobalt speciation and catalytic properties of H-ZSM-5 modified with cobalt by solid-state ion exchange reaction
Identifieur interne : 000716 ( Main/Exploration ); précédent : 000715; suivant : 000717Influence of the cobalt salt precursors on the cobalt speciation and catalytic properties of H-ZSM-5 modified with cobalt by solid-state ion exchange reaction
Auteurs : Mourad Mhamdi [Tunisie] ; Sihem Khaddar-Zine [Tunisie] ; Abdelhamid Ghorbel [Tunisie]Source :
- Applied catalysis. A, General [ 0926-860X ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Cobalt, Précurseur, Réaction catalytique, Etat solide, Echange ion, Réaction échange, Réaction état solide, Ammonioxydation, Spectrométrie XANES, Spectrométrie EXAFS, Microscopie électronique transmission, Catalyse hétérogène, Catalyseur sur support, Chlorure de cobalt, Acétate, Nitrate, Formiate, Ethylène, Ethane, Nitrile, Acétonitrile, Analyse chimique, Diffraction RX, Poudre, Adsorption, Spectrométrie IR, Ammoniac, Préparation, Ion cobalt, Zéolite ZSM5.
- Wicri :
- topic : Cobalt.
English descriptors
- KwdEn :
- Acetate, Acetonitrile, Adsorption, Ammonia, Ammoxidation, Catalytic reaction, Chemical analysis, Cobalt, Cobalt chloride, Cobalt ion, EXAFS spectrometry, Ethane, Ethylene, Exchange reaction, Formate, Heterogeneous catalysis, Infrared spectrometry, Ion exchange, Nitrates, Nitrile, Powder, Precursor, Preparation, Solid state, Solid state reaction, Supported catalyst, Transmission electron microscopy, X ray diffraction, XANES spectrometry.
Abstract
Co-ZSM-5 catalysts prepared by either aqueous or solid-state ion exchange using different cobalt precursors (acetate, chloride, nitrate or formate) were studied in the selective ammoxidation of ethylene and ethane to acetonitrile. Co2+ supported catalysts were characterized by chemical analysis, X-ray powder diffraction, N2 adsorption (BET), TEM/EDX, FTIR, XANES and EXAFS spectroscopy, H2 TPR and TPD of ammonia. It was found that all the preparations led to cobalt exchanged metal ion at the bridging oxygen of Si-OH-Al groups or to Co oxide or phyllosilicate. XRD, TEM and H2 TPR indicated the presence of cobalt oxide when cobalt chloride, formate or nitrate was used. TPD of ammonia and FTIR of pyridine, used respectively as probe molecules showed that solid-state exchange catalysts exhibited new Lewis acid sites. The catalyst resulting from cobalt acetate, which contained mostly isolated Co2+ ions in cationic exchange position and cobalt phyllosilicate, showed high activity and selectivity toward acetonitrile.
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 000114
- to stream PascalFrancis, to step Curation: 000181
- to stream PascalFrancis, to step Checkpoint: 000111
- to stream Main, to step Merge: 000722
- to stream Main, to step Curation: 000716
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Influence of the cobalt salt precursors on the cobalt speciation and catalytic properties of H-ZSM-5 modified with cobalt by solid-state ion exchange reaction</title><author><name sortKey="Mhamdi, Mourad" sort="Mhamdi, Mourad" uniqKey="Mhamdi M" first="Mourad" last="Mhamdi">Mourad Mhamdi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis</s1><s2>2092 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Khaddar Zine, Sihem" sort="Khaddar Zine, Sihem" uniqKey="Khaddar Zine S" first="Sihem" last="Khaddar-Zine">Sihem Khaddar-Zine</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis</s1><s2>2092 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Ghorbel, Abdelhamid" sort="Ghorbel, Abdelhamid" uniqKey="Ghorbel A" first="Abdelhamid" last="Ghorbel">Abdelhamid Ghorbel</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis</s1><s2>2092 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">09-0157015</idno><date when="2009">2009</date><idno type="stanalyst">PASCAL 09-0157015 INIST</idno><idno type="RBID">Pascal:09-0157015</idno><idno type="wicri:Area/PascalFrancis/Corpus">000114</idno><idno type="wicri:Area/PascalFrancis/Curation">000181</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000111</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000111</idno><idno type="wicri:doubleKey">0926-860X:2009:Mhamdi M:influence:of:the</idno><idno type="wicri:Area/Main/Merge">000722</idno><idno type="wicri:Area/Main/Curation">000716</idno><idno type="wicri:Area/Main/Exploration">000716</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Influence of the cobalt salt precursors on the cobalt speciation and catalytic properties of H-ZSM-5 modified with cobalt by solid-state ion exchange reaction</title><author><name sortKey="Mhamdi, Mourad" sort="Mhamdi, Mourad" uniqKey="Mhamdi M" first="Mourad" last="Mhamdi">Mourad Mhamdi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis</s1><s2>2092 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Khaddar Zine, Sihem" sort="Khaddar Zine, Sihem" uniqKey="Khaddar Zine S" first="Sihem" last="Khaddar-Zine">Sihem Khaddar-Zine</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis</s1><s2>2092 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author><author><name sortKey="Ghorbel, Abdelhamid" sort="Ghorbel, Abdelhamid" uniqKey="Ghorbel A" first="Abdelhamid" last="Ghorbel">Abdelhamid Ghorbel</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis</s1><s2>2092 Tunis</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><placeName><settlement type="city">Tunis</settlement><region nuts="2">Gouvernorat de Tunis</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Applied catalysis. A, General</title><title level="j" type="abbreviated">Appl. catal., A Gen.</title><idno type="ISSN">0926-860X</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Applied catalysis. A, General</title><title level="j" type="abbreviated">Appl. catal., A Gen.</title><idno type="ISSN">0926-860X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acetate</term><term>Acetonitrile</term><term>Adsorption</term><term>Ammonia</term><term>Ammoxidation</term><term>Catalytic reaction</term><term>Chemical analysis</term><term>Cobalt</term><term>Cobalt chloride</term><term>Cobalt ion</term><term>EXAFS spectrometry</term><term>Ethane</term><term>Ethylene</term><term>Exchange reaction</term><term>Formate</term><term>Heterogeneous catalysis</term><term>Infrared spectrometry</term><term>Ion exchange</term><term>Nitrates</term><term>Nitrile</term><term>Powder</term><term>Precursor</term><term>Preparation</term><term>Solid state</term><term>Solid state reaction</term><term>Supported catalyst</term><term>Transmission electron microscopy</term><term>X ray diffraction</term><term>XANES spectrometry</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Cobalt</term><term>Précurseur</term><term>Réaction catalytique</term><term>Etat solide</term><term>Echange ion</term><term>Réaction échange</term><term>Réaction état solide</term><term>Ammonioxydation</term><term>Spectrométrie XANES</term><term>Spectrométrie EXAFS</term><term>Microscopie électronique transmission</term><term>Catalyse hétérogène</term><term>Catalyseur sur support</term><term>Chlorure de cobalt</term><term>Acétate</term><term>Nitrate</term><term>Formiate</term><term>Ethylène</term><term>Ethane</term><term>Nitrile</term><term>Acétonitrile</term><term>Analyse chimique</term><term>Diffraction RX</term><term>Poudre</term><term>Adsorption</term><term>Spectrométrie IR</term><term>Ammoniac</term><term>Préparation</term><term>Ion cobalt</term><term>Zéolite ZSM5</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cobalt</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Co-ZSM-5 catalysts prepared by either aqueous or solid-state ion exchange using different cobalt precursors (acetate, chloride, nitrate or formate) were studied in the selective ammoxidation of ethylene and ethane to acetonitrile. Co<sup>2+</sup> supported catalysts were characterized by chemical analysis, X-ray powder diffraction, N2 adsorption (BET), TEM/EDX, FTIR, XANES and EXAFS spectroscopy, H<sub>2</sub> TPR and TPD of ammonia. It was found that all the preparations led to cobalt exchanged metal ion at the bridging oxygen of Si-OH-Al groups or to Co oxide or phyllosilicate. XRD, TEM and H<sub>2</sub> TPR indicated the presence of cobalt oxide when cobalt chloride, formate or nitrate was used. TPD of ammonia and FTIR of pyridine, used respectively as probe molecules showed that solid-state exchange catalysts exhibited new Lewis acid sites. The catalyst resulting from cobalt acetate, which contained mostly isolated Co<sup>2+</sup> ions in cationic exchange position and cobalt phyllosilicate, showed high activity and selectivity toward acetonitrile.</div></front></TEI><affiliations><list><country><li>Tunisie</li></country><region><li>Gouvernorat de Tunis</li></region><settlement><li>Tunis</li></settlement></list><tree><country name="Tunisie"><region name="Gouvernorat de Tunis"><name sortKey="Mhamdi, Mourad" sort="Mhamdi, Mourad" uniqKey="Mhamdi M" first="Mourad" last="Mhamdi">Mourad Mhamdi</name></region><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></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000716 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000716 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= CobaltMaghrebV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= Pascal:09-0157015
|texte= Influence of the cobalt salt precursors on the cobalt speciation and catalytic properties of H-ZSM-5 modified with cobalt by solid-state ion exchange reaction
}}
| This area was generated with Dilib version V0.6.32. |  |