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

Anne-Claire Dubreuil 1, * Fabien Chainet 1 Rui Miguel De Sousa Bartolomeu 1 Filipe Manuel Marques Mota 1 Josselin Janvier 1 Charles-Philippe Lienemann 1
* Auteur correspondant
1 IFPEN - IFP Energies nouvelles
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.
Keywords : Silicon Pd catalyst Poison Promoter Buta-1 3-diene hydrogenation Speciation Octamethylcyclotetrasiloxane
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

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Soumis le : jeudi 20 juillet 2017 - 16:42:19
Dernière modification le : vendredi 21 juillet 2017 - 13:31:28

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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〉

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