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A microwave-based method to monitor the ammonia loading of a vanadia-based SCR catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
45531 46416 2015 7 PDF Available
Title
A microwave-based method to monitor the ammonia loading of a vanadia-based SCR catalyst
Abstract

•Article is concerned with vanadia-based SCR catalysts (SCR).•A novel method (microwave cavity perturbation) can determine in operando the amount of adsorbed ammonia very precisely.•This method works for different temperatures.•It is possible to determine the stored amount of ammonia independently on the ammonia-to-NOx feed ratio.

For the selective catalytic reduction (SCR) of nitrogen oxides (NOx) from lean burn diesel engines, NH3 is used as reducing agent. In the case of V2O5–WO3 catalysts supported on TiO2 (anatase) ceramics, an adsorption of NH3 on the catalyst surface is required for the SCR reactions. To effectively control the NH3 supply and to obtain detailed knowledge on the catalyst status, it is crucial to know the current adsorbed amount of ammonia on the catalyst. It is shown for the first time in this study that it is possible to determine the ammonia loading of V2O5–WO3 catalysts contactless and in operando by a simple microwave-based approach. This method can be applied for different temperatures. It is possible to determine the stored amount of ammonia independently on the ammonia-to-NOx feed ratio.

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Keywords
Selective catalytic reduction (SCR); V2O5–WO3/TiO2; Ammonia storage; Microwaves.
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A microwave-based method to monitor the ammonia loading of a vanadia-based SCR catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 165, April 2015, Pages 36–42
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
Online Support
Any Questions? feel free to contact us