Open AccessReview of Researches on SCR Catalyst with Low Temperature and high Sulfur Tolerance and Theoretical Design
Author(s) -
Yufei Zhang
Publication year - 2020
Publication title -
e3s web of conferences
Language(s) - English
Resource type - Journals
eISSN - 2555-0403
pISSN - 2267-1242
DOI - 10.1051/e3sconf/202021301012
Subject(s) - catalysis , selective catalytic reduction , flue gas , manganese , materials science , ammonia , molecular sieve , manganese oxide , oxide , inorganic chemistry , nox , sulfur , metal , chemical engineering , nanotechnology , chemistry , metallurgy , organic chemistry , engineering , combustion
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.