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Power-bench demonstration of the Pt-catalysed C3H6-SCR of NOx in a diesel exhaust

Paper ID Volume ID Publish Year Pages File Format Full-Text
42839 45943 2009 9 PDF Available
Title
Power-bench demonstration of the Pt-catalysed C3H6-SCR of NOx in a diesel exhaust
Abstract

The SCR of NOx by C3H6 using a 0.1 wt.% Pt/Al2O3 catalyst has been successfully performed under real diesel gas streams in a power bench. The influence of some experimental variables affecting NOx, CO, and THC conversions, such as hydrocarbon concentration, reaction temperature and space velocity effect, are discussed. 96% NOx conversion has been reached under optimum conditions. The highest NOx conversion level is maintained in the range 250–325 °C but slightly higher temperature (350 °C) is desired to ensure a stable temperature and complete CO and THC removal. An optimum THC concentration is found (1500 ppm THC), higher THC concentration having a negative effect in the NOx conversion. From experiments performed at different GHSV, the reactor volume required for total NOx removal in a real exhaust stream has been estimated to be 6.5 L. Additionally, the effect of CeO2 on platinum behaviour has been studied, concluding that it enhances N2 formation as NOx reduction product with respect to N2O, but lowers the platinum activity for NOx reduction and CO and THC oxidation.

Graphical abstractThe SCR of NOx by C3H6 has been performed under real diesel gas streams in a power bench using a 0.1 wt.% Pt/Al2O3 catalyst. 96% NOx conversion has been reached under optimum conditions. The effect of a ceria promoter, reaction temperature, total hydrocarbon concentration and GHSV is discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Pt catalyst; SCR; DeNOx; Diesel; Power-bench; CeO2
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Power-bench demonstration of the Pt-catalysed C3H6-SCR of NOx in a diesel exhaust
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 354, Issues 1–2, 15 February 2009, Pages 63–71
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us