Understanding the impact of silicon compounds on metallic catalysts through experiments and multi-technical analysis

Abstract : The presence of silicon in petroleum products is a major issue due to its poisoning effect on catalysts. The aim of this work is to combine silicon speciation and poisoning tests. Cyclic siloxanes were the main silicon species found in petroleum products. Other silicon compounds, comprising reactive groups (hydroxy, methoxy and hydroperoxy), were also recovered but at trace levels using GC-ICP/MS. Five well-chosen silicon compounds were used to poison Pd/ alumina catalysts. Only dimethoxydimethylsilane poisons Pd-catalysts while polydimethylsiloxane (PDMS) has no effect on their activities in buta-1,3-diene hydrogenation. Unexpectedly, triethylsilane, triethylsilanol and even octamethylcyclotetrasiloxane (D4) exhibit a promoting effect. An interpretation of the phenomena based on various characterizations is proposed.
Type de document :
Article dans une revue
Comptes Rendus Chimie, Elsevier Masson, 2017, 20 (1), pp.55 - 66. 〈10.1016/j.crci.2016.05.020〉
Domaine :
Liste complète des métadonnées

Littérature citée [4 références]  Voir  Masquer  Télécharger

https://hal-ifp.archives-ouvertes.fr/hal-01566173
Contributeur : Françoise Bertrand <>
Soumis le : jeudi 20 juillet 2017 - 16:42:19
Dernière modification le : mardi 15 mai 2018 - 14:50:03

Fichier

PostPrint pour HAL-IFPEN.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

IFP

Citation

Anne-Claire Dubreuil, Fabien Chainet, Rui Miguel De Sousa Bartolomeu, Filipe Manuel Marques Mota, Josselin Janvier, et al.. Understanding the impact of silicon compounds on metallic catalysts through experiments and multi-technical analysis. Comptes Rendus Chimie, Elsevier Masson, 2017, 20 (1), pp.55 - 66. 〈10.1016/j.crci.2016.05.020〉. 〈hal-01566173〉

Partager

Métriques

Consultations de la notice

60

Téléchargements de fichiers

60