fulltext.study @t Gmail

Alternative alkali resistant deNOx catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
55568 47057 2012 5 PDF Available
Title
Alternative alkali resistant deNOx catalysts
Abstract

Alternative alkali resistant deNOx catalysts were prepared using three different supports ZrO2, TiO2 and Mordenite zeolite. The majority of the catalysts were prepared by incipient wetness impregnation of a commercial support, with vanadium, copper or iron precursor, one catalyst was prepared by onepot sol–gel method. All catalysts were characterized by BET, XRPD and NH3-TPD. Initial SCR activities of 8 out of 9 catalysts showed higher NO conversion at least at one temperature in the temperature range 300–500 °C compared to the conventional V2O5-WO3/TiO2 catalyst. After potassium poisoning (100–130 μmol of K/g of catalyst) the relative drop in SCR activity and acidity was lower for all the alternative catalysts compared to the industrial V2O5-WO3/TiO2 catalyst. Furthermore, Cu/MOR and Nano-V2O5/Sul-TiO2 catalysts showed 8–16 times higher SCR activities than the conventional even after high potassium doping (250 and 280 μmol of K/g, respectively). The increased poisoning resistance was due to high substrate acidity (sulphated, heteropoly acid promoted and zeolite supports), substituting the active species of the catalyst (other than vanadium species, i.e. Cu, Fe) and new catalyst synthesis methods (Nano-V2O5/Sul-TiO2 catalyst prepared by sol–gel method).

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (117 K)Download as PowerPoint slideHighlights► Alternative and promising catalysts for flue gas cleaning in biomass fired applications. ► Alternative catalysts can perform with in SCR operating temperature region. ► Cu/MOR and Nano-V2O5/Sul-TiO2 catalysts are highly active and alkali poison resistant.

Keywords
Selective catalytic reduction; Potassium resistivity; Deactivation; NH3-TPD; deNOx
First Page Preview
Alternative alkali resistant deNOx 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 184, Issue 1, 30 April 2012, Pages 192–196
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