CobaltMaghrebV1, Main, Exploration, bibRecord, 000866

Total oxidation of propene and propane over gold-copper oxide on alumina catalysts Comparison with Pt/Al2O3

Identifieur interne : 000866 ( Main/Exploration ); précédent : 000865; suivant : 000867

Total oxidation of propene and propane over gold-copper oxide on alumina catalysts Comparison with Pt/Al2O3

Auteurs : Andreea C. Gluhoi [Pays-Bas] ; Nina Bogdanchikova [Mexique] ; Bernard E. Nieuwenhuys [Pays-Bas]

Source :

Catalysis today [ 0920-5861 ] ; 2006.

RBID : Pascal:06-0371423

Descripteurs français

Pascal (Inist)
- Oxydation, Propène, Propane, Or, Cuivre oxyde, Alumine, Catalyseur sur support, Platine, Additif, Cobalt oxyde, Catalyse hétérogène.
Wicri :
- topic : Propane, Or, Platine.

English descriptors

KwdEn :
- Additive, Alumina, Cobalt oxide, Copper oxide, Gold, Heterogeneous catalysis, Oxidation, Platinum, Propane, Propene, Supported catalyst.

Abstract

Oxidation of propene and propane to CO₂ and H₂O has been studied over Au/Al₂O₃ and two different Au/CuO/Al₂O₃ (4 wt.% Au and 7.4 wt.% Au) catalysts and compared with the catalytic behaviour of Au/Co₃O₄/Al₂O₃ (4.1 wt.% Au) and Pt/Al₂O₃ (4.8 wt.% Pt) catalysts. The various characterization techniques employed (XRD, HRTEM, TPR and DR-UV-vis) revealed the presence of metallic gold, along with a highly dispersed CuO (6 wt.% CuO), or more crystalline CuO phase (12 wt.% CuO). A higher CuO loading does not significantly influence the catalytic performance of the catalyst in propene oxidation, the gold loading appears to be more important. Moreover, it was found that 7.4Au/CuO/Al₂O₃ is almost as active as Pt/Al₂O₃, whereas Au/Co₃O₄/Al₂O₃ performs less than any of the CuO-containing gold-based catalysts. The light-off temperature for C₃H₈ oxidation is significantly higher than for C₃H₆. For this reaction the particle size effect appears to prevail over the effect of gold loading. The most active catalysts are 4Au/CuO/Al₂O₃ (gold particles less than 3 nm) and 4Au/Co₃O₄/Al₂O₃ (gold particles less than 5 nm).

Affiliations:

Mexique, Pays-Bas

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Le document en format XML

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<term>Heterogeneous catalysis</term>
<term>Oxidation</term>
<term>Platinum</term>
<term>Propane</term>
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<term>Alumine</term>
<term>Catalyseur sur support</term>
<term>Platine</term>
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<term>Cobalt oxyde</term>
<term>Catalyse hétérogène</term>
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<front><div type="abstract" xml:lang="en">Oxidation of propene and propane to CO<sub>2</sub>
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O<sub>3</sub>
 and two different Au/CuO/Al<sub>2</sub>
O<sub>3</sub>
 (4 wt.% Au and 7.4 wt.% Au) catalysts and compared with the catalytic behaviour of Au/Co<sub>3</sub>
O<sub>4</sub>
/Al<sub>2</sub>
O<sub>3</sub>
 (4.1 wt.% Au) and Pt/Al<sub>2</sub>
O<sub>3</sub>
 (4.8 wt.% Pt) catalysts. The various characterization techniques employed (XRD, HRTEM, TPR and DR-UV-vis) revealed the presence of metallic gold, along with a highly dispersed CuO (6 wt.% CuO), or more crystalline CuO phase (12 wt.% CuO). A higher CuO loading does not significantly influence the catalytic performance of the catalyst in propene oxidation, the gold loading appears to be more important. Moreover, it was found that 7.4Au/CuO/Al<sub>2</sub>
O<sub>3</sub>
 is almost as active as Pt/Al<sub>2</sub>
O<sub>3</sub>
, whereas Au/Co<sub>3</sub>
O<sub>4</sub>
/Al<sub>2</sub>
O<sub>3</sub>
 performs less than any of the CuO-containing gold-based catalysts. The light-off temperature for C<sub>3</sub>
H<sub>8</sub>
 oxidation is significantly higher than for C<sub>3</sub>
H<sub>6</sub>
. For this reaction the particle size effect appears to prevail over the effect of gold loading. The most active catalysts are 4Au/CuO/Al<sub>2</sub>
O<sub>3</sub>
 (gold particles less than 3 nm) and 4Au/Co<sub>3</sub>
O<sub>4</sub>
/Al<sub>2</sub>
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<name sortKey="Nieuwenhuys, Bernard E" sort="Nieuwenhuys, Bernard E" uniqKey="Nieuwenhuys B" first="Bernard E." last="Nieuwenhuys">Bernard E. Nieuwenhuys</name>
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<country name="Mexique"><noRegion><name sortKey="Bogdanchikova, Nina" sort="Bogdanchikova, Nina" uniqKey="Bogdanchikova N" first="Nina" last="Bogdanchikova">Nina Bogdanchikova</name>
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Total oxidation of propene and propane over gold-copper oxide on alumina catalysts Comparison with Pt/Al2O3

Total oxidation of propene and propane over gold-copper oxide on alumina catalysts Comparison with Pt/Al2O3

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