A sol-gel Ti-Al-Ce-nanoparticle catalyst for simultaneous removal of NO and Hg0 from simulated flue gas.

To optimize simultaneous control of NO and elemental mercury (Hg 0 ) and gain more insight into the mechanisms, nano-sized TiO 2 -Al 2 O 3 -CeO 2 materials synthesized via sol-gel method were used for simultaneous removal of NO and Hg 0 from simulated flue gas. The physicochemical characteristics of catalysts were characterized by ICP-OES, BET, XRD, SEM, TEM, XPS, H 2 -TPR and FT-IR. TiAl 10 Ce 20 nanoparticle with the addition of 10 wt%Al 2 O 3 showed superior NO removal efficiency (93.41%) and Hg 0 removal efficiency (80.54%) in the presence of SCR atmosphere at 300 °C. The deactivation effects of 8% H 2 O and 400 ppm SO 2 were also reduced by Al addition. In the presence of SCR atmosphere, the capture of Hg 0 was inhibited by the existence of NH 3 , while the presence of Hg 0 had little impact on NO removal. The characterization results showed that the excellent performance of TiAl 10 Ce 20 nanoparticle might result from the stronger redox ability, lower crystallinity and better texture properties with highly dispersed Ce species, which were all attributed to Al addition. The mechanisms for simultaneous removal of NO and Hg 0 were also proposed on the basis of above results. TiAl 10 Ce 20 nanoparticle developed in this work was considered to be a promising catalyst for simultaneous removal of NO and Hg 0 . [ABSTRACT FROM AUTHOR]