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Regeneration of deactivated catalysts coated on foam and monolith: Example of Pd/C for nitrobenzene hydrogenation

Paper ID Volume ID Publish Year Pages File Format Full-Text
40377 45852 2013 6 PDF Available
Title
Regeneration of deactivated catalysts coated on foam and monolith: Example of Pd/C for nitrobenzene hydrogenation
Abstract

The deactivation and regeneration of Pd/carbon coated support catalysts, used during nitrobenzene hydrogenation, were studied. Three methods have been tested: electrochemical treatment, chemical oxidation and oxygen plasma treatment. The regenerated catalysts were characterized by physisorption of nitrogen (BET method) and were compared with the activities of fresh catalysts. It was found that the electrochemical treatment allows the complete regeneration of the catalyst, without any modification of textural properties. Simple chemical oxidation did not allow the activity recovery of Pd catalysts and led to modification of the textural properties of carbon. Finally, the catalyst may be regenerated also by plasma method, albeit with some increase of the pore diameter.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (207 K)Download as PowerPoint slideHighlights► Simple methods to regenerate the used Pd/carbon-coated catalysts are described. ► Three methods have been tested: electrochemical, oxidation and oxygen plasma. ► The electrochemical treatment allows the complete regeneration of the Pd/C catalyst. ► Complete recovery of initial activities for nitrobenzene hydrogenation is obtained. ► No modification and no degradation of the textural properties of carbon are observed.

Keywords
Carbon washcoating; Palladium; Deactivation; Electrochemical regeneration; Oxidation; Plasma regeneration; Structured catalytic reactors
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Regeneration of deactivated catalysts coated on foam and monolith: Example of Pd/C for nitrobenzene hydrogenation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 453, 26 February 2013, Pages 28–33
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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