Low-Temperature Selective Catalytic Reduction (SCR) of NO with NH3 by Using Mn, Cr, and Cu Oxides Supported on Hombikat TiO2

Abstract

A Highly active, time stable, and water resistant, Hombikat TiO2 supported Mn catalyst has been developed for the selective reduction of NO by NH3 [Eq. (1)]. The analogous Cu and Cr supported catalysts also provide 100 % N2 selectivity at ≤120°C. Lewis acidity, redox properties, and a high surface metal oxide concentration are essential for good catalytic performance.

Manganese–niobium mixed oxide catalyst for the selective catalytic reduction of NOx with NH3 at low temperatures

“…V, Cr, Mn, Fe, Co, Ni, Cu) oxides have been investigated in the low-temperature SCR reaction. Among these, Mn-containing catalysts exhibited high catalytic activities, such as MnO x -CeO 2 [5,6], Cr-MnO x [7], Mn/TiO 2 [8][9][10][11][12], MnO x / Ce 0.5 Zr 0.5 O 2 [13], and Mn-Ce/ZSM-5 [14].…”

Manganese Dioxide Graphite Composite Electrodes: Application to the Electroanalysis of Hydrogen Peroxide, Ascorbic Acid and Nitrite

“…2 They have been used for a wide range of industrial catalytic applications: ozone decomposition, 3 photocatalytic oxidation of organic pollutants and wastewater treatment, 4 nitric oxide reduction, [5][6][7][8] selective oxidations of carbon monoxide, 9 alcohols 10-12 and others. Manganese dioxide is the preferred structure of manganese oxides for electrochemical applications due to its suitably high density and purity, electrochemical activity under a range of discharge conditions, as well as relatively inexpensive commercial production; 13 it is by far the most common electroactive cathode material used in primary batteries.…”

Poisoning Effect of SO2 on Honeycomb Cordierite-Based Mn–Ce/Al2O3Catalysts for NO Reduction with NH3 at Low Temperature

“…Manganese oxides (MnO x ) have been extensively studied and proven to be highly active for low-temperature SCR of NO with NH 3 since they contain various types of labile oxygen species, which are essential for completing the catalytic cycle [12][13][14][15][16]. Researchers have also developed various Mn-based catalysts, such as MnO x /Al 2 O 3 [15], MnO x /TiO 2 [16,17] andMn-Ce-SnO 2 [18].…”

“…Researchers have also developed various Mn-based catalysts, such as MnO x /Al 2 O 3 [15], MnO x /TiO 2 [16,17] andMn-Ce-SnO 2 [18]. In addition, small concentrations of SO 2 remain in the flue gases after the desulfurizer, thus requiring consideration of the effect of SO 2 on activity.…”