fulltext.study @t Gmail

Manganese oxide-based catalysts for low-temperature selective catalytic reduction of NOx with NH3: A review

Paper ID Volume ID Publish Year Pages File Format Full-Text
38699 45788 2016 16 PDF Available
Title
Manganese oxide-based catalysts for low-temperature selective catalytic reduction of NOx with NH3: A review
Abstract

•Recent progress on Mn-based catalysts for low temperature SCR de-NOx was reviewed.•Special attention was paid to clarify the various roles played by each component.•The effects of supports were emphasized according to the type of supports.•Reaction mechanism and future direction for SCR catalysts were discussed.

Selective catalytic reduction (SCR) technology has been widely used for the removal of NOx from flue gas. However, it is still a challenge to develop novel low-temperature catalysts for SCR of NOx, especially at temperatures below 200 °C. This paper reviewed the recent progress on the Mn-based catalysts for low-temperature SCR de-NOx with NH3. Catalysts were divided into four categories, single MnOx, Mn-based multi-metal oxide, Mn-based multi-metal oxide with support, and Mn-based monolith catalyst. In the section of single MnOx, the effects of several factors, such as Mn oxidation state, crystallization state, specific surface area and morphology on catalytic activity were systematically reviewed. In the section of multi-metal oxide catalysts, the various roles played by the components of catalysts were intentionally summarized from four aspects, improving de-NOx efficiency, enhancing N2 selectivity, improving resistance to SO2 and H2O, extending operation temperature window, respectively. Moreover, the newly emerging morphology-dependent nanocatalysts were highlighted at the end of this section. In the introduction of supported metal oxide catalysts, the effects of supports were systematically analyzed according to their types, such as Al2O3, TiO2, carbon materials, etc. Considering the actual operation, Mn-based monolith catalysts were also introduced with regard to monolith supports, such as ceramics, metal wire mesh, etc. Subsequently, NH3-SCR mechanisms at low temperature, including E-R and L-H mechanisms, were discussed. At last, the perspective and the future direction of low-temperature SCR of NOx were proposed.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (152 K)Download as PowerPoint slide

Keywords
Selective catalytic reduction; Low temperature; Manganese oxide; de-NOx
First Page Preview
Manganese oxide-based catalysts for low-temperature selective catalytic reduction of NOx with NH3: A review
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: Applied Catalysis A: General - Volume 522, 25 July 2016, Pages 54–69
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