화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.6, 1858-1866, June, 2017
DOI10.1007/s11814-017-0047-8  Export Citation
Iron-manganese-magnesium mixed oxides catalysts for selective catalytic reduction of NOx with NH3
Kang Zhang, Liting Xu, Shengli Niu, Chunmei Lu†, Dong Wang1, Qi Zhang, and Jing Li2
  • School of Energy and Power Engineering, Shandong University, Jinan 250061, China
  • 1School of Environment, Tsinghua University, Beijing 100084, China
  • 2School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
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SCR activity at low temperature over iron oxide catalyst was prominently optimized by adding manganese and magnesium. Fe0.7Mn0.15Mg0.15Oz(n(Mn)/[n(Fe)+n(Mn)+n(Mg)])=0.15 and n(Mg)/[n(Fe)+n(Mn)+n(Mg)]=0.15) presented better performance in the low temperature SCR and NOx conversion of 90% could be achieved over 125 °C. Meanwhile, part of manganese and magnesium oxides were highly dispersed on the catalyst surface in an amorphous phase to react with iron oxide to form solid solution. Manganese and magnesium dopants could optimize the pore structure and distribution of γ-Fe2O3 to enhance the surface area and pore volume. Moreover, O2 participated in SCR reaction at a faster rate than NH3. In addition, the effect of SO2 was proved to be irreversible, whereas the inhibition of H2O could be rapidly removed after its removal.
Keywords:Fe0.7Mn0.15Mg0.15Oz Catalyst;γ-Fe2O3 Catalyst;Low-temperature SCR;H2O and SO2 Resistance;Catalyst Activity
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