Titania-Supported Cobalt and Cobalt–Phosphorus Catalysts: Characterization and Performances in Ethane Oxidative Dehydrogenation
Identifieur interne : 000057 ( Istex/Curation ); précédent : 000056; suivant : 000058Titania-Supported Cobalt and Cobalt–Phosphorus Catalysts: Characterization and Performances in Ethane Oxidative Dehydrogenation
Auteurs : Younes Brik [Maroc] ; Mohamed Kacimi [Maroc] ; Mahfoud Ziyad [Maroc] ; François Bozon-Verduraz [France]Source :
- Journal of Catalysis [ 0021-9517 ] ; 2001.
English descriptors
- KwdEn :
Abstract
TiO2-supported Cobalt and cobalt–phosphorus catalysts prepared by impregnation are characterized by XRD, XPS, Laser Raman Spectroscopy (LRS), and Diffuse Reflectance Spectroscopy (DRS) and investigated in ethane oxidative dehydrogenation (ODH). At low cobalt loadings, the carrier is essentially covered by octahedral Co2+ ions, whereas at concentrations superior to 3.7 wt% formation of the Co3O4 spinel is observed. The best performance in ethane ODH is achieved at 550°C with the sample containing 7.6 wt% Co. The reaction begins with a conversion of 33% and a selectivity around 75%, then it decreases to reach after 150 min on stream a stationary state at 22% of conversion and 60% selectivity. This loss of 30% of the initial activity may be associated with a decrease of the specific surface area and the concomitant formation of CoTiO3 and Co2TiO4, as revealed by LRS, in situ DRS, and XPS analysis. The activity in ethane ODH seems to be mainly related to the presence of Co2+ ions octahedral sites. Addition of phosphorus to Co(7.6)/TiO2 catalysts results in the reduction of Co3+ ions and a growth of amorphous cobalt–phosphorus compounds which provoke a severe decrease of the catalyst performance.
Url:
DOI: 10.1006/jcat.2001.3262
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: Pour aller vers cette notice dans l'étape Curation :000244
Links to Exploration step
ISTEX:5E4B0C11F0F91CC04A1D0BD495507FCBC5C62515Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Titania-Supported Cobalt and Cobalt–Phosphorus Catalysts: Characterization and Performances in Ethane Oxidative Dehydrogenation</title>
<author><name sortKey="Brik, Younes" sort="Brik, Younes" uniqKey="Brik Y" first="Younes" last="Brik">Younes Brik</name>
<affiliation wicri:level="1"><mods:affiliation>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat, Morocco</mods:affiliation>
<country xml:lang="fr">Maroc</country>
<wicri:regionArea>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kacimi, Mohamed" sort="Kacimi, Mohamed" uniqKey="Kacimi M" first="Mohamed" last="Kacimi">Mohamed Kacimi</name>
<affiliation wicri:level="1"><mods:affiliation>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat, Morocco</mods:affiliation>
<country xml:lang="fr">Maroc</country>
<wicri:regionArea>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Ziyad, Mahfoud" sort="Ziyad, Mahfoud" uniqKey="Ziyad M" first="Mahfoud" last="Ziyad">Mahfoud Ziyad</name>
<affiliation wicri:level="1"><mods:affiliation>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat, Morocco</mods:affiliation>
<country xml:lang="fr">Maroc</country>
<wicri:regionArea>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Bozon Verduraz, Francois" sort="Bozon Verduraz, Francois" uniqKey="Bozon Verduraz F" first="François" last="Bozon-Verduraz">François Bozon-Verduraz</name>
<affiliation wicri:level="1"><mods:affiliation>Laboratoire de Chimie des Matériaux Divisés et Catalyse, Université Paris 7-Denis Diderot, 2, place Jussieu, Paris cedex 05, 75251, France</mods:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire de Chimie des Matériaux Divisés et Catalyse, Université Paris 7-Denis Diderot, 2, place Jussieu, Paris cedex 05, 75251</wicri:regionArea>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:5E4B0C11F0F91CC04A1D0BD495507FCBC5C62515</idno>
<date when="2001" year="2001">2001</date>
<idno type="doi">10.1006/jcat.2001.3262</idno>
<idno type="url">https://api.istex.fr/document/5E4B0C11F0F91CC04A1D0BD495507FCBC5C62515/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">000244</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000244</idno>
<idno type="wicri:Area/Istex/Curation">000057</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Titania-Supported Cobalt and Cobalt–Phosphorus Catalysts: Characterization and Performances in Ethane Oxidative Dehydrogenation</title>
<author><name sortKey="Brik, Younes" sort="Brik, Younes" uniqKey="Brik Y" first="Younes" last="Brik">Younes Brik</name>
<affiliation wicri:level="1"><mods:affiliation>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat, Morocco</mods:affiliation>
<country xml:lang="fr">Maroc</country>
<wicri:regionArea>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Kacimi, Mohamed" sort="Kacimi, Mohamed" uniqKey="Kacimi M" first="Mohamed" last="Kacimi">Mohamed Kacimi</name>
<affiliation wicri:level="1"><mods:affiliation>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat, Morocco</mods:affiliation>
<country xml:lang="fr">Maroc</country>
<wicri:regionArea>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Ziyad, Mahfoud" sort="Ziyad, Mahfoud" uniqKey="Ziyad M" first="Mahfoud" last="Ziyad">Mahfoud Ziyad</name>
<affiliation wicri:level="1"><mods:affiliation>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat, Morocco</mods:affiliation>
<country xml:lang="fr">Maroc</country>
<wicri:regionArea>Faculté des Sciences, Département de Chimie, Laboratoire de Physico-chimie des Matériaux et Catalyse, Avenue Ibn Battouta, B.P. 1017, Rabat</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Bozon Verduraz, Francois" sort="Bozon Verduraz, Francois" uniqKey="Bozon Verduraz F" first="François" last="Bozon-Verduraz">François Bozon-Verduraz</name>
<affiliation wicri:level="1"><mods:affiliation>Laboratoire de Chimie des Matériaux Divisés et Catalyse, Université Paris 7-Denis Diderot, 2, place Jussieu, Paris cedex 05, 75251, France</mods:affiliation>
<country xml:lang="fr">France</country>
<wicri:regionArea>Laboratoire de Chimie des Matériaux Divisés et Catalyse, Université Paris 7-Denis Diderot, 2, place Jussieu, Paris cedex 05, 75251</wicri:regionArea>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Journal of Catalysis</title>
<title level="j" type="abbrev">YJCAT</title>
<idno type="ISSN">0021-9517</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="2001">2001</date>
<biblScope unit="volume">202</biblScope>
<biblScope unit="issue">1</biblScope>
<biblScope unit="page" from="118">118</biblScope>
<biblScope unit="page" to="128">128</biblScope>
</imprint>
<idno type="ISSN">0021-9517</idno>
</series>
<idno type="istex">5E4B0C11F0F91CC04A1D0BD495507FCBC5C62515</idno>
<idno type="DOI">10.1006/jcat.2001.3262</idno>
<idno type="PII">S0021-9517(01)93262-2</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0021-9517</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>XPS</term>
<term>cobalt–TiO2 catalysts</term>
<term>ethane oxidative dehydrogenation</term>
<term>in situ diffuse reflectance spectroscopy</term>
<term>laser Raman spectroscopy</term>
<term>phosphorus–cobalt–TiO2 catalysts</term>
</keywords>
</textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">TiO2-supported Cobalt and cobalt–phosphorus catalysts prepared by impregnation are characterized by XRD, XPS, Laser Raman Spectroscopy (LRS), and Diffuse Reflectance Spectroscopy (DRS) and investigated in ethane oxidative dehydrogenation (ODH). At low cobalt loadings, the carrier is essentially covered by octahedral Co2+ ions, whereas at concentrations superior to 3.7 wt% formation of the Co3O4 spinel is observed. The best performance in ethane ODH is achieved at 550°C with the sample containing 7.6 wt% Co. The reaction begins with a conversion of 33% and a selectivity around 75%, then it decreases to reach after 150 min on stream a stationary state at 22% of conversion and 60% selectivity. This loss of 30% of the initial activity may be associated with a decrease of the specific surface area and the concomitant formation of CoTiO3 and Co2TiO4, as revealed by LRS, in situ DRS, and XPS analysis. The activity in ethane ODH seems to be mainly related to the presence of Co2+ ions octahedral sites. Addition of phosphorus to Co(7.6)/TiO2 catalysts results in the reduction of Co3+ ions and a growth of amorphous cobalt–phosphorus compounds which provoke a severe decrease of the catalyst performance.</div>
</front>
</TEI>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Istex/Curation
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000057 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Curation/biblio.hfd -nk 000057 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Terre |area= CobaltMaghrebV1 |flux= Istex |étape= Curation |type= RBID |clé= ISTEX:5E4B0C11F0F91CC04A1D0BD495507FCBC5C62515 |texte= Titania-Supported Cobalt and Cobalt–Phosphorus Catalysts: Characterization and Performances in Ethane Oxidative Dehydrogenation }}
This area was generated with Dilib version V0.6.32. |