High deNOx performance of Mn/TiO2 catalyst by NH3

Integrated removal of NO and mercury from coal combustion flue gas using manganese oxides supported on TiO 2

“…As Mn loading increased, the surface area and pore volume showed a trend of increasing initially. This phenomenon was attributed to MnO x being incorporated into the TiO 2 structure, providing additional nucleation sites and moderating the sintering and pore plugging of TiO 2 (Kim et al, 2010a(Kim et al, , 2010b. Mn0.6Ti and Mn0.8Ti exhibited the largest surface areas of 122 m 2 /g, a value larger than that of commercial SCR catalysts (usually less than 100 m 2 /g) (Senior, 2006).…”

“…Li et al (2011b) conclude that the CeO 2 /TiO 2 catalyst exhibits good Hg 0 removal activity because of the strong oxygen storage capacity of Ce. Kim et al (2010aKim et al ( , 2010b report that CuCl 2 /TiO 2 shows both high NO and Hg 0 removal efficiency. However, the reaction temperature of the above catalysts is about 350-400°C, so that they must be placed between the economizer and air preheater where they are exposed to fly ash, which diminishes the working life of the catalysts (Benson et al, 2005;Ettireddy et al, 2007;Qi and Yang, 2003).…”

“…Among SCR catalysts, MnO x /TiO 2 catalysts have been reported to exhibit prominent catalytic activity at an economical low temperature (Ji et al, 2008;Kim et al, 2010aKim et al, , 2010bLi et al, 2007Li et al, , 2010Lu et al, 2014;Wu et al, 2007;Xie et al, 2012). For example, Wu et al (2007) found that more than 90% of NO could be removed by MnO x /TiO 2 within the reaction temperature window of 150-250°C.…”

MnO supported on Fe–Ti spinel: A novel Mn based low temperature SCR catalyst with a high N2 selectivity

“…Therefore, the low temperature SCR catalysts, which are placed downstream of the electrostatic precipitator and desulfurizer, are strongly demanded [5]. Mn based SCR catalysts, for example Mn/TiO 2 [6,7], Mn-Fe/TiO 2 [8], MnO x -CeO 2 [9,10], MnO x -CeO 2 /TiO 2 [11,12], Mn promoted V 2 O 5 /TiO 2 [13] and Mn-Fe spinel [14], show an excellent SCR activity at low temperatures. However, Mn based catalysts are extremely restricted in the low temperature SCR reaction for at least two reasons: the lower N 2 selectivity and the deactivation by SO 2 [5,15].…”

Ultrasound-assisted preparation of titania–alumina support with high surface area and large pore diameter by modified precipitation method

“…TiO 2 , being a good support candidate or catalyst, was applied into many catalysis fields such as reduction [1], oxidation [2,3], hydrogenation [4,5] and photocatalytic [6,7], but they have no pore system and the relatively low specific surface area, limiting their extensive application in catalysis. Normal alumina has a relative large specific surface area (200 m 2 /g), but it still cannot meet the demand of chemical and petrochemical industry.…”