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Performance of nano-sized Au/TiO2 for selective catalytic reduction of NOx by propene

Paper ID Volume ID Publish Year Pages File Format Full-Text
42897 45945 2008 6 PDF Available
Title
Performance of nano-sized Au/TiO2 for selective catalytic reduction of NOx by propene
Abstract

Nano-sized gold particles supported on titania catalysts (Au/TiO2) were prepared by metal sol method. The catalytic activity of the nano-sized Au/TiO2 catalysts for selective catalytic reduction (SCR) of NOx by propene in the presence of excess oxygen was investigated. The maximum NOx conversion to N2 over Au (1 wt.%)/TiO2 was obtained at 325 °C which is relatively lower than was the case for Au/Al2O3. Anatase crystalline type is preferable for Au/TiO2 catalyst because of the higher NOx reduction and C3H6 oxidation performance at low temperatures compared with the rutile form. When the Au loading was lowered to 0.1 wt.%, the peak temperature shifted to 375 °C but the maximum NOx conversion remained the same as that of 1 wt.% Au loading sample. The full width at half maximum of conversion (FWHM) increased significantly as the loading of Au decreased. FWHM of 0.1 wt.% Au loading was almost two times wider than that of the 1 wt.% Au loading sample. The effect of feed composition, including moisture, was also investigated.

Graphical abstractNano-sized gold particles on titania catalysts were prepared by metal sol method. The catalytic activity for selective catalytic reduction of NOx by C3H6 was evaluated in the excess oxygen condition. At very low Au loading of 0.1%, good catalytic performance and a relatively wide operation window were achieved, although the peak temperature shifted to slightly higher temperature. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Nano-sized gold; Au/TiO2; SCR; Metal sol method
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Performance of nano-sized Au/TiO2 for selective catalytic reduction of NOx by propene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 347, Issue 1, 1 September 2008, Pages 94–99
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us