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Influence of the reducing agent for lean NOx reduction over Cu-ZSM-5

Paper ID Volume ID Publish Year Pages File Format Full-Text
47121 46459 2011 8 PDF Available
Title
Influence of the reducing agent for lean NOx reduction over Cu-ZSM-5
Abstract

A range of ethers, alcohols and alkanes were compared as reducing agents for NOx over a Cu-ZSM-5 lean NOx catalyst. The nature of the reducing agent was found to determine the degree of NOx reduction. Methanol and DME were virtually inactive as reductants over this catalyst, while higher ethers and alcohols showed high NOx conversion. A detailed study was performed to investigate the differences. Among the studied variables, the chemical structure of the reductant was found to be especially important. Despite having a lower reducing capacity than DME, ethylene glycol was active for NOx reduction. It is concluded that a C–C bond in the reducing agent is required for lean NOx reduction over Cu-ZSM-5. The absence of this bond in DME and methanol explains their low activity for NOx reduction over this catalyst.

Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ The molecular structure of reducing agents determines their NOx reduction capacity. ▶ Zeolite Cu-ZSM-5 requires a C–C bond in the reducing agent for lean NOx reduction. ▶ DME and methanol do not reduce NOx over Cu-ZSM-5, but ethylene glycol does.

Keywords
Hydrocarbon-SCR; NOx reduction; Zeolite; Alternative fuel; Dimethyl ether; Alcohol; Ether; Alkane; Reducing agent; Cu-ZSM-5
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Influence of the reducing agent for lean NOx reduction over Cu-ZSM-5
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 102, Issues 3–4, 22 February 2011, Pages 547–554
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