Review of Researches on SCR Catalyst with Low Temperature and high Sulfur Tolerance and Theoretical Design

• Published in: E3S web of conferences 2020-01, Vol.213, p.1012
• Main Author: Zhang, Yufei
• Format: Article
• Language: English
• Subjects: Ammonia; Catalysts; Chemical reduction; Denitration; Flue gas; Heavy metals; Low temperature; Manganese; Metal oxides; Molecular sieves; Molybdenum oxides; Molybdenum trioxide; Nitrogen oxides; Operating temperature; Photochemicals; Selective catalytic reduction; Selectivity; Sulfur; Temperature tolerance; Titanium dioxide; Vanadium pentoxide
• ISSN: 2267-1242; 2555-0403; 2267-1242
• DOI: 10.1051/e3sconf/202021301012

Selective catalytic reduction (SCR) of nitrogen oxides (NO x ) using ammonia (NH 3 ) is currently the main technology for flue gas denitration. However, the currently widely used commercial catalysts (such as V 2 O 5 -WO 3 / TiO 2 , V 2 O 5 -MoO 3 / TiO 2 , etc.) have the disadvantages of high operating temperature, narrow active temperature window, and high catalytic cost. Therefore, in recent years, researchers have devoted themselves to the development of low-cost and efficient low-temperature SCR catalytic materials. This paper summarizes the research progress of low-temperature (less than 250 °C) selective catalytic reduction of NO x by unsupported metal oxide catalysts, supported metal oxide catalysts, precious metals, and molecular sieve catalysts. Among them, manganese-based catalysts show good low-temperature selectivity and stability, and have good application prospects. Finally, the research directions of manganese low temperature SCR catalysts are prospected and theoretically designed based on the existing problems.