NickelMaghrebV1, Main, Exploration, bibRecord, 000A25

Isomerization of n-hexane over silica-supported heteropoly acids promoted by the reduced Ce-Ni oxides

Identifieur interne : 000A25 ( Main/Exploration ); précédent : 000A24; suivant : 000A26

Isomerization of n-hexane over silica-supported heteropoly acids promoted by the reduced Ce-Ni oxides

Auteurs : WENXING KUANG [France] ; Alain Rives [France] ; BOUCHTA OULED BEN TAYEB [France, Maroc] ; Michel Fournier [France] ; Robert Hubaut [France]

Source :

Journal of colloid and interface science [ 0021-9797 ] ; 2002.

RBID : Pascal:02-0286096

Descripteurs français

Pascal (Inist)
- Isomérisation, Hexane, Silice, Hétéropolyacide, Cérium Oxyde, Nickel Oxyde, Réduction chimique, Catalyseur modifié, Catalyseur sur support, Promoteur, Hydrocarbure, Alcane, Spectrométrie Raman, Coke, Désactivation, Catalyse hétérogène, Tungstosilicique acide, Tungstophosphorique acide, Tungstoborique acide.
Wicri :
- topic : Hydrocarbure, Coke.

English descriptors

KwdEn :
- Alkane, Cerium Oxides, Chemical reduction, Coke, Deactivation, Heterogeneous catalysis, Heteropolyacid, Hexane, Hydrocarbon, Isomerization, Modified catalyst, Nickel Oxides, Promoter, Raman spectrometry, Silica, Supported catalyst.

Abstract

The structure and catalytic properties of silica-supported heteropoly acids promoted by the reduced Ce-Ni oxides are first studied by using chemical analysis XRD, FT-Raman, XPS, EPR, TG, surface area measurements, and microreactor test. It is found that silica-supported heteropoly acids have isomerization activity, but are very easy to deactivate by coke deposition. With the promotion of the reduced Ce-Ni oxides, however, the better activity and the higher selectivity to isomers could be obtained, suggesting that the reduced Ce-Ni oxides really have hydrogenating/dehydrogenating functions. Moreover, it is found that the presence of the reduced Ce-Ni oxides is not only beneficial for eliminating the coke deposition, but also effective for maintaining the structure of silica-supported heteropoly acids during reaction. The effect of the composition of the mechanical mixtures of silica-supported heteropoly acids and the Ce-Ni oxides on the catalytic properties has been explored.

Affiliations:

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

to stream PascalFrancis, to step Corpus: 000394
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to stream PascalFrancis, to step Checkpoint: 000391
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Le document en format XML

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<term>Heterogeneous catalysis</term>
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<term>Hydrocarbon</term>
<term>Isomerization</term>
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<term>Nickel Oxides</term>
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<term>Réduction chimique</term>
<term>Catalyseur modifié</term>
<term>Catalyseur sur support</term>
<term>Promoteur</term>
<term>Hydrocarbure</term>
<term>Alcane</term>
<term>Spectrométrie Raman</term>
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<term>Catalyse hétérogène</term>
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<term>Tungstophosphorique acide</term>
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<front><div type="abstract" xml:lang="en">The structure and catalytic properties of silica-supported heteropoly acids promoted by the reduced Ce-Ni oxides are first studied by using chemical analysis XRD, FT-Raman, XPS, EPR, TG, surface area measurements, and microreactor test. It is found that silica-supported heteropoly acids have isomerization activity, but are very easy to deactivate by coke deposition. With the promotion of the reduced Ce-Ni oxides, however, the better activity and the higher selectivity to isomers could be obtained, suggesting that the reduced Ce-Ni oxides really have hydrogenating/dehydrogenating functions. Moreover, it is found that the presence of the reduced Ce-Ni oxides is not only beneficial for eliminating the coke deposition, but also effective for maintaining the structure of silica-supported heteropoly acids during reaction. The effect of the composition of the mechanical mixtures of silica-supported heteropoly acids and the Ce-Ni oxides on the catalytic properties has been explored.</div>
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Isomerization of n-hexane over silica-supported heteropoly acids promoted by the reduced Ce-Ni oxides

Isomerization of n-hexane over silica-supported heteropoly acids promoted by the reduced Ce-Ni oxides

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri