Synergy of KCl and Hgel on selective catalytic reduction of NO with NH3 over V2O5–WO3/TiO2 catalysts

Performance impact and poisoning mechanism of arsenic over commercial V2O5–WO3/TiO2 SCR catalyst

“…This means the decrease of V = O. The similar phenomenon was also appeared in some researches on catalyst deactivation causing by other poisons [10,25]. It has been proposed that the amount and strength of V = O bonds were one of the most important factors adsorbing NH 3 onto V = O sites as NH 4+ to react with NO x , controlling the reactivity of V 2 O 5 /TiO 2 based catalysts [26].…”

“…Both occupying and covering the active sites would lead to catalytic deactivation. Many researches have been developed on the deactivation mechanism over V 2 O 5 /TiO 2 based SCR catalysts, which was caused by fly ash, alkali salts, Hg and Pb et al [7][8][9][10][11]. However, recently some industry operating data revealed that arsenic (As) is also one of the most poison elements for deactivating V 2 O 5 -WO 3 /TiO 2 SCR catalysts.…”

Activity enhancement of WO3 modified Fe2O3 catalyst for the selective catalytic reduction of NO by NH3

“…WO 3 is widely used as a promoter of V 2 O 5 /TiO 2 catalyst for the NH 3 -SCR reaction [3,[11][12][13], and W-based NH 3 -SCR catalyst has also attracted attention [1,14]. Ce-W-Ti catalyst showed excellent NH 3 -SCR activity and the presence of W could lead to a remarkably high dispersion of Ce species and increased acid sites on the catalyst [15].…”

A novel low temperature catalyst regenerated from deactivated SCR catalyst for Hg0 oxidation

“…Hg 0 oxidation over commercial SCR catalysts was very dependent on the HCl concentration in the flue gas [31][32][33]. As shown in the inset picture in Fig.…”