A Review of Low Temperature NH3-SCR for Removal of NOx

The importance of the low-temperature selective catalytic reduction (LT-SCR) of NOx by NH3 is increasing due to the recent severe pollution regulations being imposed around the world. Supported and mixed transition metal oxides have been widely investigated for LT-SCR technology. However, these cata...

Full description

Saved in:
Bibliographic Details
Published in:Catalysts 2019-04, Vol.9 (4), p.349
Main Authors: Damma, Devaiah, Ettireddy, Padmanabha, Reddy, Benjaram, Smirniotis, Panagiotis
Format: Article
Language:English
Subjects:
Ammonia
Catalysts
Chemical reactions
Chemical reduction
de-NOx catalysis
Fossil fuels
Industrial plant emissions
Low temperature
low-temperature selective catalytic reduction
Metal oxides
NH3-SCR
Nitrogen oxides
Oxidation
Reaction intermediates
Reaction mechanisms
Selective catalytic reduction
SO2/H2O tolerance
Temperature
Transition metal oxides
transition metal-based catalysts
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The importance of the low-temperature selective catalytic reduction (LT-SCR) of NOx by NH3 is increasing due to the recent severe pollution regulations being imposed around the world. Supported and mixed transition metal oxides have been widely investigated for LT-SCR technology. However, these catalytic materials have some drawbacks, especially in terms of catalyst poisoning by H2O or/and SO2. Hence, the development of catalysts for the LT-SCR process is still under active investigation throughout seeking better performance. Extensive research efforts have been made to develop new advanced materials for this technology. This article critically reviews the recent research progress on supported transition and mixed transition metal oxide catalysts for the LT-SCR reaction. The review covered the description of the influence of operating conditions and promoters on the LT-SCR performance. The reaction mechanism, reaction intermediates, and active sites are also discussed in detail using isotopic labelling and in situ FT-IR studies.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal9040349