| 초록 |
FeVO4 (Fe1) is of great interest as a catalytic phase used to reduce NOX by NH3 (NH3-SCR). This is because Fe1 incorporates NOX/NH3-accessible V sites and electronic inductive effect-driven catalytic defects, all of which are seldom aggregated due to higher melting point of Fe1 than that of conventional V2O5 phase. To better utilize the benefits of Fe1 stated above, Fe1 underwent structural modification via the change in its Fe:V stoichiometry from 1:1 to 1:2. This led to the formation of Fe2V4O13 (Fe2), whose properties were more desirable to turnover NOX than those of Fe1. Fe2 experienced additional improvement post being functionalized with SOY2- species (Y=3 or 4) or neighbored with Sb promoter. The optimized catalyst could accelerate fast NH3-SCR, outperformed Fe1 or V2O5-including catalysts, and showed significant tolerance to surface poisons such as SO2, ammonium (bi)sulfate, and Na. |
