Increased co-oxidation activity for mercury under hot and cold site coal power plant conditions – Preparation and evaluation of Au/TiO2-coated SCR-DeNOx catalysts

Catalytic Conversion of Multipollutants (Hg0/NO/Dioxin) with V2O5–WO3/TiO2 Catalysts

“…The mass spectrometer was operated with a resolution greater than 10 000 under positive EI conditions, and data were obtained in the selected ion monitoring (SIM) mode. The mean recoveries of standards for all 13 C 12 -2,3,7,8substituted PCDD/Fs range from 55% to 105%. The recoveries are all within the acceptable 40−130% range, set by the U.S. EPA in Method 23.…”

“…12 In contrast, it was significantly dependent on HCl content of flue gas at high temperatures (>300 °C). 13 In coal-fired power plant, the SCR system is mainly used for NO x emission control. Hence, some studies have investigated simultaneous Hg 0 /NO conversion efficiency under different operating conditions.…”

“…Usberti et al revealed that the conversion of Hg 0 was temperature dependent under various HCl concentrations below 300 °C . In contrast, it was significantly dependent on HCl content of flue gas at high temperatures (>300 °C) …”

Review on the latest developments in modified vanadium-titanium-based SCR catalysts

“…This indicates that V2O5, as the main active component in commercial SCR catalysts, is one of the most effective metal oxides for Hg 0 catalytic oxidation. In fact, many mercury oxidation catalysts have been developed [133], such as Au/TiO2 [134], CuO/TiO2 [135], CeO2/TiO2 [136], MNOx-CeO2/TiO2 [137,138], CuO-CeO2/TiO2 [139,140], V2O5/ZrO2-CeO2 [141], MNOx-CeO2-ZrO2 [142], Co-Ce-ZrO2 [143], Mn/γ-Al2O3 [144], CuCl2/γ-Al2O3 [145], Nb-Co-Ce/Al2O3 [146], Fe-Ti-Mn spinel [147], and Co-MF [148]. Although all these catalysts demonstrated a high mercury oxidation efficiency, their components are quite different from the traditional vanadium-titanium-based catalysts and thus, their application to deNOx flue gas is uncertain.…”

Heterogeneous oxidation of elemental mercury vapor over RuO2/rutile TiO2 catalyst for mercury emissions control

“…[12,13] Various metal oxide-based Hg(0) oxidation catalysts, SCR and modified SCR catalysts have also been studied for Hg(0) oxidation. [14][15][16][17][18][19][20][21][22] Due to the oxygen storing and releasing property of CeO 2 , its application in Hg(0) oxidation and adsorption in flue gas has been studied in recent years.…”