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Journal articles
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.
Cited literature [4 references]
https://hal-ifp.archives-ouvertes.fr/hal-01566173
Contributor : Françoise Bertrand <>
Submitted on : Thursday, July 20, 2017 - 4:42:19 PM
Last modification on : Thursday, February 7, 2019 - 5:16:14 PM
Contributor : Françoise Bertrand <>
Submitted on : Thursday, July 20, 2017 - 4:42:19 PM
Last modification on : Thursday, February 7, 2019 - 5:16:14 PM
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