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NO reduction with NH3 under oxidizing atmosphere on copper loaded hydroxyapatite

Paper ID Volume ID Publish Year Pages File Format Full-Text
46703 46445 2012 6 PDF Available
Title
NO reduction with NH3 under oxidizing atmosphere on copper loaded hydroxyapatite
Abstract

Copper loaded hydroxyapatite catalysts were prepared by ion exchange in aqueous phase. The copper ion exchange capacity of hydroxyapatite host structure is highly dependent on the initial copper concentration of the solution. For the lowest concentration, a pH variation of the exchange solution is observed. This change in pH may allow the deposition of a small amount of copper hydroxide at the expense of cationic substitution of copper. The increase in copper content exchanged has no effect on the profile of conversion of NO by NH3. From this, it is assumed that the copper cations substituted for calcium are not active in the reaction. The profiles of NO conversion obtained, are in agreement with the presence of a small amount of copper oxide clusters deposited on the surfaces of the apatite.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlight► Cu-Hap catalysts prepared by ion exchange in solution. ► Copper ion exchange capacity of Ca-Hap host structure is highly dependent on the initial copper concentration. ► The increase in copper content exchanged has no effect on the profile of conversion of NO by NH3. ► Highly dispersed CuO clusters on Ca-Hap surfaces were responsible for the activity at temperatures below 250 °C.

Keywords
Selective catalytic reduction; Nitric oxide; Ammonia; Copper; Hydroxyapatite
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NO reduction with NH3 under oxidizing atmosphere on copper loaded hydroxyapatite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 113–114, 22 February 2012, Pages 255–260
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
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us