Fe-modified Ce-MnOx/ACFN catalysts for selective catalytic reduction of NOx by NH3 at low-middle temperature
2019
Gu, Tian | Gao, Fengyu | Tang, Xiaolong | Yi, Honghong | Zhao, Shunzheng | Zaharaddeen, Sani | Zhang, Runcao | Zhuang, Ruijie | Ma, Yingli
A series of MnOₓ/ACFN, Ce-MnOₓ/ACFN, and Fe-Ce-MnOₓ/ACFN catalysts on selective catalytic reduction (SCR) of NOₓ with NH₃ at low-middle temperature had been successfully prepared through ultrasonic impregnation method, and the catalysts were characterized by SEM, XRD, BET, H₂-TPR, NH₃-TPD, XPS, and FT-IR spectroscopy, respectively. The results demonstrated that the 15 wt% Fe₍₁₎-Ce₍₃₎-MnOₓ₍₇₎/ACFN catalyst achieved 90% NOₓ conversion (100~300 °C), good water resistance, and stability (175 °C). The excellent catalytic performance of the Fe₍₁₎-Ce₍₃₎-MnOₓ₍₇₎/ACFN catalyst was mainly attributed to the interaction among Mn, Ce, and Fe. The doping of Fe promoted the dispersion of Ce and Mn and the formation of more Mn⁴⁺ and chemisorbed oxygen on the surface of a catalyst. This work laid a foundation for the successful application of active carbon fiber in the field of industrial denitrification, especially in the aspect of denitrification moving bed. Graphic abstract
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