fulltext.study @t Gmail

Non-thermal plasma-assisted NOx storage and reduction over cobalt-containing LNT catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
53613 46977 2015 10 PDF Available
Title
Non-thermal plasma-assisted NOx storage and reduction over cobalt-containing LNT catalysts
Abstract

•Cobalt-containing catalysts exhibited higher activity for NO oxidation than Pt/Ba/Al.•Pd/Co/Ba/Al showed improved NOx conversion by employing plasma in rich phase.•High NOx conversion can be obtained at a broad temperature window (150–350 °C).

Based on their high NO oxidation capacity (NOC) and NOx storage capacity (NSC), cobalt-containing LNT catalysts of the type Co/Ba/Al and Pd/Co/Ba/Al were tested under NOx storage-reduction (NSR) conditions, as well as in an H2-plasma assisted NSR process. For comparison purposes, a traditional Pt/Ba/Al catalyst was tested under the same conditions. The Co/Ba/Al catalyst exhibited similar catalytic properties to those of the Pt/Ba/Al catalyst when an H2-plasma was employed in the rich phase to assist reduction of the stored NOx. However, the NOx removal efficiency was greatly depressed by the presence of H2O and CO2 in the feed. Notably, the addition of Pd to the Co/Ba/Al sample greatly lessened the inhibiting effects of H2O and CO2 on plasma-assisted cycle-averaged NOx conversion, this being due to the excellent NOx storage performance of the Pd/Co/Ba/Al sample even in the presence of H2O and CO2. The results of the present study show that by combining the high NOx storage capacity of Pd/Co/Ba/Al in the lean phase with non-thermal plasma-assisted activation of the reductant in the rich phase, high NOx conversion can be obtained over a broad temperature window of 150–350 °C.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (175 K)Download as PowerPoint slide

Keywords
Cobalt; Palladium; NOx storage-reduction; Lean NOx trap; Non-thermal plasma
First Page Preview
Non-thermal plasma-assisted NOx storage and reduction over cobalt-containing LNT catalysts
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 258, Part 2, 1 December 2015, Pages 386–395
Authors
, , , , , ,
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