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Low temperature selective catalytic reduction of NO and NO2 with NH3 over activated carbon-supported vanadium oxide catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
55736 47063 2011 7 PDF Available
Title
Low temperature selective catalytic reduction of NO and NO2 with NH3 over activated carbon-supported vanadium oxide catalyst
Abstract

Selective catalytic reduction (SCR) of NO and NO2 with ammonia was investigated over activated carbon-supported vanadium oxide (V2O5/AC) catalyst. The results show that high activity and selectivity could be achieved in wide range of temperatures and space velocities. NOx conversion to N2 increases with increasing NO2/NOx ratio, and the increase vanishes gradually with increasing temperature. An increase of NOx conversion to N2 from 26% to 94% can be achieved at a temperature as low as 150 °C without the formation of NH4NO3. The results of temperature programmed desorption (TPD) and infrared (IR) spectrometry experiments show that NH4NO3 could be deposited on the catalyst at 100 °C and decomposed to NH3, N2O, and NO around 130 °C. To explain the observed behaviors, AC involved NO2-SCR process was proposed, in which NH4NO3 is reduced to N2 by AC instead of NO. This process shows better reactivity at lower temperatures.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (300 K)Download as PowerPoint slideHighlights► NO2 is adsorbed on V2O5/AC to form nitrogen complexes, decomposed around 130 °C. ► V2O5/AC shows high activity and selectivity. ► NOx conversion to N2 increase with increasing NO2/NOx ratio, especially at 150 °C. ► NH4NO3 could be deposited on the catalyst at 100 °C and decomposed around 130 °C.

Keywords
Selective catalytic reduction; Ammonia; V2O5/AC; Nitrogen dioxide; Ammonium nitrate
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Low temperature selective catalytic reduction of NO and NO2 with NH3 over activated carbon-supported vanadium oxide catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 175, Issue 1, 25 October 2011, Pages 164–170
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