Selective Catalytic Reduction of NOx with NH3 by Using Novel Catalysts: State of the Art and Future Prospects
Top Cited Papers
- 15 August 2019
- journal article
- review article
- Published by American Chemical Society (ACS) in Chemical Reviews
- Vol. 119 (19), 10916-10976
- https://doi.org/10.1021/acs.chemrev.9b00202
Abstract
Selective catalytic reduction with NH3 (NH3–SCR) is the most efficient technology to reduce the emission of nitrogen oxides (NOx) from coal-fired industries, diesel engines, etc. Although V2O5–WO3(MoO3)/TiO2 and CHA structured zeolite catalysts have been utilized in commercial applications, the increasing requirements for broad working temperature window, strong SO2/alkali/heavy metal-resistance, and high hydrothermal stability have stimulated the development of new-type NH3–SCR catalysts. This review summarizes the latest SCR reaction mechanisms and emerging poison-resistant mechanisms in the beginning and subsequently gives a comprehensive overview of newly developed SCR catalysts, including metal oxide catalysts ranging from VOx, MnOx, CeO2, and Fe2O3 to CuO based catalysts; acidic compound catalysts containing vanadate, phosphate and sulfate catalysts; ion exchanged zeolite catalysts such as Fe, Cu, Mn, etc. exchanged zeolite catalysts; monolith catalysts including extruded, washcoated, and metal-mesh/foam-based monolith catalysts. The challenges and opportunities for each type of catalysts are proposed while the effective strategies are summarized for enhancing the acidity/redox circle and poison-resistance through modification, creating novel nanostructures, exposing specific crystalline planes, constructing protective/sacrificial sites, etc. Some suggestions are given about future research directions that efforts should be made in. Hopefully, this review can bridge the gap between newly developed catalysts and practical requirements to realize their commercial applications in the near future.Keywords
Funding Information
- Ministry of Science and Technology of the People's Republic of China (2014CB660803)
- China Postdoctoral Science Foundation (2018M630426)
- Science and Technology Commission of Shanghai Municipality (17230741400, 19YF1415300, 15DZ2281400)
- National Natural Science Foundation of China (21722704, 51108258)
This publication has 550 references indexed in Scilit:
- Effect of preparation methods on the performance of CeO2/Al2O3 catalysts for selective catalytic reduction of NO with NH3Journal of Industrial and Engineering Chemistry, 2013
- Preparation of highly active manganese oxides supported on functionalized MWNTs for low temperature NOx reduction with NH3Applied Surface Science, 2013
- In situ supported MnOx–CeOx on carbon nanotubes for the low-temperature selective catalytic reduction of NO with NH3Nanoscale, 2012
- Selective catalytic reduction of NOx with NH3 over iron–cerium mixed oxide catalyst: catalytic performance and characterizationJournal of Chemical Technology & Biotechnology, 2012
- The influence of silicon on the catalytic properties of Cu/SAPO-34 for NOx reduction by ammonia-SCRApplied Catalysis B: Environment and Energy, 2012
- Mn–Fe/ZSM5 as a low-temperature SCR catalyst to remove NOx from diesel engine exhaustApplied Catalysis B: Environment and Energy, 2012
- Rod‐Shaped Fe2O3 as an Efficient Catalyst for the Selective Reduction of Nitrogen Oxide by AmmoniaAngewandte Chemie-International Edition, 2012
- Low-temperature selective catalytic reduction of NO with NH3 over monolith catalyst of MnOx/CeO2–ZrO2–Al2O3Catalysis Today, 2011
- Low-temperature selective catalytic reduction of NOx with NH3 over metal oxide and zeolite catalysts—A reviewCatalysis Today, 2011
- Cr–MnOx mixed-oxide catalysts for selective catalytic reduction of NOx with NH3 at low temperatureJournal of Catalysis, 2010