Methane conversion to higher alkanes over ruthenium and cobalt loaded Zr3(PO4)4
Identifieur interne : 000944 ( Main/Exploration ); précédent : 000943; suivant : 000945Methane conversion to higher alkanes over ruthenium and cobalt loaded Zr3(PO4)4
Auteurs : N. Cheikhi [Maroc] ; M. Zivad [Maroc]Source :
- Journal de physique. IV [ 1155-4339 ] ; 2005.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Cobalt, Hydrocarbure.
English descriptors
- KwdEn :
Abstract
The catalyst Ru-Co/Zr3(PO4)4 was synthesized by impregnation and was tested in the reaction of oligomerization of methane into higher hydrocarbon. The reaction was carried out using a two-steps procedure consisting of: - Methane adsorption. - Hydrogenation of the adsorbed entities and formation of higher hydrocarbons. The production of these alkanes extends from ethane to pentane and could schematically be described by the following pathways: CH4 ⇄ (CHx)ads + (4-X)/2H2 CHx, CHy ⇄ CnHm The results showed that addition of cobalt to ruthenium improved the global activity. This promoter effect was attributed to the synergy brought in by cobalt and to the formation of Ru-CO2+species which are more active than ruthenium alone. These species were identified by EDX-STEM and XPS analyses.
Affiliations:
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Zivad</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Faculté des Sciences, Laboratoire de Physico-Chimie des Matériaux et Catalyse, Département de Chimie, BP. 1014</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">05-0363864</idno><date when="2005">2005</date><idno type="stanalyst">PASCAL 05-0363864 INIST</idno><idno type="RBID">Pascal:05-0363864</idno><idno type="wicri:Area/PascalFrancis/Corpus">000180</idno><idno type="wicri:Area/PascalFrancis/Curation">000115</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000185</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000185</idno><idno type="wicri:doubleKey">1155-4339:2005:Cheikhi N:methane:conversion:to</idno><idno type="wicri:Area/Main/Merge">000955</idno><idno type="wicri:Area/Main/Curation">000944</idno><idno type="wicri:Area/Main/Exploration">000944</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Methane conversion to higher alkanes over ruthenium and cobalt loaded Zr<sub>3</sub>(PO<sub>4</sub>)<sub>4</sub></title><author><name sortKey="Cheikhi, N" sort="Cheikhi, N" uniqKey="Cheikhi N" first="N." last="Cheikhi">N. Cheikhi</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Faculté des Sciences, Laboratoire de Physico-Chimie des Matériaux et Catalyse, Département de Chimie, BP. 1014</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author><author><name sortKey="Zivad, M" sort="Zivad, M" uniqKey="Zivad M" first="M." last="Zivad">M. Zivad</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Faculté des Sciences, Laboratoire de Physico-Chimie des Matériaux et Catalyse, Département de Chimie, BP. 1014</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal de physique. IV</title><title level="j" type="abbreviated">J. phys., IV</title><idno type="ISSN">1155-4339</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal de physique. IV</title><title level="j" type="abbreviated">J. phys., IV</title><idno type="ISSN">1155-4339</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alkane</term><term>Cobalt</term><term>Heterogeneous catalysis</term><term>Hydrocarbon</term><term>Methane</term><term>Oligomerization</term><term>Platinoid</term><term>Ruthenium</term><term>Supported catalyst</term><term>Transition metal</term><term>Zirconium Phosphates</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Catalyseur sur support</term><term>Métal transition</term><term>Platinoïde</term><term>Zirconium Phosphate</term><term>Ruthénium</term><term>Cobalt</term><term>Oligomérisation</term><term>Méthane</term><term>Catalyse hétérogène</term><term>Hydrocarbure</term><term>Alcane</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cobalt</term><term>Hydrocarbure</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The catalyst Ru-Co/Zr<sub>3</sub>(PO<sub>4</sub>)<sub>4</sub> was synthesized by impregnation and was tested in the reaction of oligomerization of methane into higher hydrocarbon. The reaction was carried out using a two-steps procedure consisting of: - Methane adsorption. - Hydrogenation of the adsorbed entities and formation of higher hydrocarbons. The production of these alkanes extends from ethane to pentane and could schematically be described by the following pathways: CH<sub>4</sub> ⇄ (CH<sub>x</sub>)<sub>ads</sub> + (4-X)/2H<sub>2</sub> CH<sub>x</sub>, CH<sub>y</sub> ⇄ C<sub>n</sub>H<sub>m</sub> The results showed that addition of cobalt to ruthenium improved the global activity. This promoter effect was attributed to the synergy brought in by cobalt and to the formation of Ru-CO<sup>2+</sup>species which are more active than ruthenium alone. These species were identified by EDX-STEM and XPS analyses.</div></front></TEI><affiliations><list><country><li>Maroc</li></country><region><li>Rabat-Salé-Kénitra</li></region><settlement><li>Rabat</li></settlement></list><tree><country name="Maroc"><region name="Rabat-Salé-Kénitra"><name sortKey="Cheikhi, N" sort="Cheikhi, N" uniqKey="Cheikhi N" first="N." last="Cheikhi">N. Cheikhi</name></region><name sortKey="Zivad, M" sort="Zivad, M" uniqKey="Zivad M" first="M." last="Zivad">M. Zivad</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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