| Titre : |
Promotion of heterogeneous catalysts |
| Type de document : |
texte imprimé |
| Auteurs : |
Andrei Y. Khodakov, Auteur ; Vitaly Ordomsky, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 12-18 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Catalyse hétérogène
|
| Tags : |
'Catalyse hétérogène' 'Nanoparticules métalliques' Promoteurs 'Dépôt sélectif' Activité Sélectivité Stabilité |
| Index. décimale : |
541.39 Réactions et synthèse chimiques |
| Résumé : |
Supported metal-based heterogeneous catalysts are widely used in all areas of chemistry. The catalytic performance of metal catalysts can be improved by addition of small amounts of so-called promoters, which can be either metals or non-metallic elements.
The promoters can modify the dispersion, morphology and intrinsic activity of the catalytically active phases. They may affect the catalyst texture and mechanical properties and even introduce new types of catalytically active species. Very often, the promoter distribution on the catalyst surface is considered to be uniform and immobile. Selective deposition and use of highly mobile promoters such as soldering metals, carbon species and iodine provide unique opportunities for design of highly efficient and sustainable heterogeneous catalysts and for performing catalytic reactions in a different way.
The elaborated strategy significantly improves catalyst activity, selectivity to the target products, and stability. Several examples of this strategy are given in this article for the reactions of Fischer-Tropsch synthesis, amination and etherification. |
| Note de contenu : |
- The key role of promoters
- Liquid metal promoters for Fischer-Tropsch synthesis over Fe and Co catalysts
- Carbon deposition for selective synthesis of primary amines
- Iodine deposition for reductive etherification reaction over Pd
- Towards new catalytic processes |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33445 |
in L'ACTUALITE CHIMIQUE > N° 447 (01/2020) . - p. 12-18
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Promotion of heterogeneous catalysts in L'ACTUALITE CHIMIQUE, N° 447 (01/2020)
