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Catalytic reduction of nitrate in water: Promoted palladium catalysts supported in resin

Paper ID Volume ID Publish Year Pages File Format Full-Text
42366 45922 2010 8 PDF Available
Title
Catalytic reduction of nitrate in water: Promoted palladium catalysts supported in resin
Abstract

The reactive properties of Pd–Cu and Pd–In catalysts over weak anionic exchange resin as support was investigated in the catalytic nitrate reduction. Pd–Cu/resin catalysts were prepared upon different copper fixation procedures (ion exchange method and controlled surface reaction). The samples were tested in a batch reactor with H2 bubbling and constant pH. The fresh and reacted catalysts were characterized by TEM, EPMA, XRD and XPS. The results demonstrated a higher activity of the Pd–Cu/resin catalyst prepared upon controlled surface reaction due to a high concentration of binary sites in the external surface. On the other hand, the XRD and TEM analyses indicated that sinterization occurs during reaction, leading to an increase in the average particle size.In the same way, a Pd–In/resin was investigated showing more activity and less selectivity than the Pd–Cu/resin sample.

Graphical abstractNitrate can be eliminated from drinking water by catalytic reduction. Nevertheless, the development of active and selective catalysts for this reaction has not been easy. We found that depending upon the preparation procedure very different catalytic behavior was found, as shown in the figure. The retention capacity of nitrate by ion exchange as well as its conversion depends not only on the metal content, but also in the preparation procedure.Figure optionsDownload full-size imageDownload high-quality image (98 K)Download as PowerPoint slide

Keywords
Nitrate catalytic reduction; Pd–Cu catalysts; Pd–In catalysts; Resin; Water treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 372, Issue 1, 5 January 2010, Pages 40–47
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
Online Support
Any Questions? feel free to contact us