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1. Comparison on the Performance of α-Fe2O3 and γ-Fe2O3 for Selective Catalytic Reduction of Nitrogen Oxides with Ammonia

Author

Huazhen Chang, Shijian Yang, Lei Ma, Junhua Li, Caixia Liu, Arandiyan Hamidreza, and Yue Peng

Subjects
Ammonia, chemistry.chemical_compound, Adsorption, chemistry, Inorganic chemistry, Selective catalytic reduction, General Chemistry, Nitrogen oxides, Catalysis, Organometallic chemistry
Abstract

γ-Fe2O3 catalyst showed higher catalytic activity than α-Fe2O3 in 150–300 °C. Both NH3 and NO x species adsorbed and reacted easily on γ-Fe2O3. However, NH3 adsorbed on α-Fe2O3 and then reacted with gaseous NO x . Gaseous NO x was more easily adsorbed on α-Fe2O3 than gaseous NH3, consequently, stable nitrates formed and blocked the active sites, which affected the SCR reaction badly.

Published
2013

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