A plasma-assisted catalytic system for NO removal over CuCe/ZSM-5 catalysts at ambient temperature

作者：Wang, Tao^*; Liu, Hanzi; Zhang, Xinyu; Guo, Yonghong; Zhang, Yongsheng; Wang, Yang; Sun, Baomin

来源：Fuel Processing Technology, 2017, 158: 199-205.

DOI：10.1016/j.fuproc.2017.01.011

• Dielectric barrier discharge
• NO
• CuCe/ZSM5
• Catalyst

A series of CuCe catalysts were prepared by an incipient-wetness impregnation method for selective catalytic reduction of NO in combination with dielectric barrier discharge plasma. The effect of the Cu/Ce mass ratio on NO and NOx (NO + NO2) removal efficiency has been studied as a function of energy density at ambient temperature. The catalyst samples were characterised by BET, XRD, XPS, H-2-TPR and NH3-TPD. The results indicated that catalyst addition enhances NO and NOx removal based on only the plasma process. The CuCe catalysts exhibited higher reduction performance compared with the 4 wt.% Cu or 4 wt.% Ce catalysts, and the catalyst with 4 wt.% Cu and 4 wt.% Ce showed the best reduction performance with the highest NO and NOx removal efficiencies of 90.7% and 80.1%, respectively, at an energy density of 367 J/L. The interactions between Cu and Ce increase oxygen migration to form oxygen vacancies, which facilitates the oxidation of NO to NO2, and NO2 favours NO removal via a fast selective catalytic reduction reaction at low temperature. In addition, the CuCe catalysts exhibited low thermal stability, thereby facilitating the catalytic reduction of NO at ambient temperature.

• 出版日期2017-4
• 单位华北电力大学（保定）; 华北电力大学