Poisoning and regeneration of commercial V2O5-WO3/TiO2 selective catalytic reduction (SCR) catalyst in coal-fired power plants

Research on structural strengthening technology for regenerative denitration catalysts

“…After the impregnation of aluminum nitrate, the hydrogen reduction peak moved toward 419 1C, while the hydrogen reduction peak of the aluminum sulfate catalyst sample moved to near 455 1C, and both belonged to the reduction peak of vanadium oxide. 29 This indicated that the structural strengthening process used in this experiment was not conducive to the SCR reaction on the catalyst surface. This may have been due to wrapping, which results in less contact with Ti and reduces the overall catalytic effect.…”

Polymerization State of Vanadyl Species Affects the Catalytic Activity and Arsenic Resistance of the V2O5–WO3/TiO2 Catalyst in Multipollutant Control of NOx and Chlorinated Aromatics

“…However, the complex components ( e.g. , As, Pb, SO 2 , H 2 O) in the flue gases of industrial processes often result in mutual interferences in the MPC reaction, which thereby complicates the MPC performance of the V 2 O 5 –WO 3 /TiO 2 catalyst. , Over the years, studies on the resistance to interferences in the NH 3 -SCR process have been extensively explored. − However, few studies have investigated the MPC interference mechanism and anti-interference. , Our previous work demonstrated that the loaded As 2 O 3 species distinctly decreased the oxygen vacancy formation energy at the V–O–V site, which likely contributed to the extensive formation of more toxic polychlorinated byproducts in the MPC reaction. Moreover, the As 2 O 5 species vigorously attacked the neighboring VO sites, forming the As–O–V bands and deactivating the deNO x reaction …”

“…12 However, the complex components (e.g., As, Pb, SO the MPC performance of the V 2 O 5 −WO 3 /TiO 2 catalyst. 13,14 Over the years, studies on the resistance to interferences in the NH 3 -SCR process have been extensively explored. 15−19 However, few studies have investigated the MPC interference mechanism and anti-interference.…”

La and Co Addition to Mn/TiO2 Catalysts for Enhancing Low-Temperature Denitrification Activity and H2O/SO2 Tolerance

“…Nitrogen oxides (NO x ) are serious air pollutants discharged by mobile and fixed sources, which can give rise to environmental pollution and even do harm to human health . The selective catalytic reduction of NO x by ammonia (NH 3 –SCR) is a widely used approach to solve the air pollution problems; V 2 O 5 –WO 3 /TiO 2 materials are the most commonly used commercial catalysts in this process. , However, vanadium-based catalysts have obvious drawbacks, including narrow operating windows (300–400 °C), huge biological toxicity, easy poison in alkali metals, and low high-temperature N 2 selectivity. Therefore, the exploration of vanadium-free low-temperature NH 3 –SCR catalysts has attracted widespread attention in recent decades …”