High-Dispersed VO-CuO Nanoparticles on h-BN in NH-SCR and NH-SCO Performance.

Typically, to meet emission regulations, the selective catalytic reduction of NO with NH (NH-SCR) technology cause NH emissions owing to high NH/NO ratios to meet emission regulations. In this study, V-Cu/BN-Ti was used to remove residual NO and NH. Catalysts were evaluated for selective catalytic oxidation of NH (NH-SCO) in the NH-SCR reaction at 200-300 °C. The addition of vanadium and copper increased the number of Brønsted and Lewis acid sites available for the reaction by increasing the ratio of V and forming Cu species, respectively. Furthermore, h-BN was dispersed in the catalyst to improve the content of vanadium and copper species on the surface. NH and NO conversion were 98% and 91% at 260 °C, respectively. Consequently, slipped NH (NH-Slip) emitted only 2% of the injected ammonia. Under SO conditions, based on the NH oxidation reaction, catalytic deactivation was improved by addition of h-BN. This study suggests that h-BN is a potential catalyst that can help remove residual NO and meet NH emission regulations when placed at the bottom of the SCR catalyst layer in coal-fired power plants.