Simultaneous removal of NO and dichloromethane（CH2Cl2） over Nb-loaded cerium nanotubes catalyst

Herein, a series of niobium oxide supported cerium nanotubes（Ce NTs） catalysts with different loading amount of Nb₂O₅（0–10 wt.%） were prepared and used for selective catalytic reduction of NOxwith NH₃（NH₃-SCR） in the presence of CH₂Cl₂. Commercial V₂O₅-WO₃-TiO₂ catalyst was also prepared for comparison. The physcial properties and chemical properties of the Nb₂O₅ lo...

Simultaneous removal of NO and dichloromethane (CH2Cl2) over Nb-loaded cerium nanotubes catalyst

Herein,a series of niobium oxide supported cerium nanotubes (CeNTs) catalysts with dif-ferent loading amount of Nb2O5 (0-10 wt％) were prepared and used for selective catalytic reduction of NOx with NH3 (NH3-SCR) in the presence of CH2Cl2.Commercial V2O5-WO3-TiO2 catalyst was also prepared for comparison.The physcial properties and chemical prop-erties of the Nb2O5 loaded cerium nanotubes catalysts were investigated by X-ray diffrac-tometer,Transmission electron microscope,Brunauer-Emmett-Teller specific surface area,H2-temperature programmed reduction,NH3-temperature programmed desorption and X-ray photoelectron spectroscopy.The experiment results showed that the loading amount of Nb2O5 had a significant effect on the catalytic performance of the catalysts.10 wt.％Nb-CeNTs catalyst presented the best NH3-SCR performance and degradation efficiency of CH2Cl2 among the prepared catalysts,due to its superior redox capability,abundant surface oxygen species and acid sites,the interaction between Nb and Ce,higher ratio of Nb4+/(Nb5+ + Nb4+) and Ce3+/(Ce3+ + Ce4+),as well as the special tubular structure of cerium nanotube.This study may provide a practical approach for the design and synthesis of SCR catalysts for the simultaneously removal NOx and chlorinated volatile organic compounds(CVOCs) emitted from the stationary industrial sources.