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In situ electrochemical regeneration of deactivated coated foam catalysts in a Robinson–Mahoney basket reactor: Example of Pd/C for nitrobenzene hydrogenation

Paper ID Volume ID Publish Year Pages File Format Full-Text
53708 46981 2015 7 PDF Available
Title
In situ electrochemical regeneration of deactivated coated foam catalysts in a Robinson–Mahoney basket reactor: Example of Pd/C for nitrobenzene hydrogenation
Abstract

•Cylindrical foams were coated with Pd/C and used in nitrobenzene hydrogenation.•The Pd/C/foams were used in place of the basket of a Mahoney–Robinson reactor.•Electrochemical regenerations were performed after deactivation of the catalyst.•Successive in situ regenerations of the coated catalyst were successfully carried out.•No significant loss of catalyst was observed after regeneration.

The electrochemical in situ regeneration of spent Pd/C/foam catalysts was investigated using a modified Mahoney–Robinson reactor (RM). The same reactor was used for reaction and regeneration experiments with and without removal/weighing of the catalyst between each measurement. The feasibility of the electrochemical regeneration was assessed by monitoring the catalyst activity versus cumulative turnover number (TON). The results showed that the catalyst activity was fully recovered after regeneration and that the catalyst had the same deactivation rate after several reaction/regeneration cycles. The influence of the foam pretreatment step and of the pH electrolyte solution on the catalyst loss was also studied. A basic pretreatment of the foam before the catalyst coating led to a significant improvement of the catalyst adherence on the foam.

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Keywords
Carbon washcoating; Nitrobenzene hydrogenation; Palladium; Electrochemical regeneration; Basket reactor
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In situ electrochemical regeneration of deactivated coated foam catalysts in a Robinson–Mahoney basket reactor: Example of Pd/C for nitrobenzene hydrogenation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 249, 1 July 2015, Pages 52–58
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
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