Deactivation and regeneration of sulfur-poisoned supported palladium complexes

The deactivation by thiophene of the [PdCl 2(CH 3SOCH 3) 2] and the [PdCl 2(NH 2(CH 2) 12CH 3) 2] complexes supported on γ-Al 2O 3, during the selective hydrogenation of styrene has been studied at 353 K and 10 kg cm −2. Although both complexes are deactivated when the feed contains more than 300 pp...

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Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 1997-08, Vol.122 (2), p.141-146
Main Authors: Fígoli, Nora S., L'Argentiere, Pablo C.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Palladium
Regeneration
Sulfur resistance
Supported complexes
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The deactivation by thiophene of the [PdCl 2(CH 3SOCH 3) 2] and the [PdCl 2(NH 2(CH 2) 12CH 3) 2] complexes supported on γ-Al 2O 3, during the selective hydrogenation of styrene has been studied at 353 K and 10 kg cm −2. Although both complexes are deactivated when the feed contains more than 300 ppm thiophene, the [PdCl 2(NH 2(CH 2) 12CH 3) 2] supported complex is more sulfur resistant. Thiophene is partially eliminated by hydrogen treatments at 353 K and 10 kg cm −2, thereby indicating that thiophene has not substituted, at least totally, the complex ligands.
ISSN:1381-1169
1873-314X
DOI:10.1016/S1381-1169(97)00027-7