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Catalysts 2017, 7(2), 71; doi:10.3390/catal7020071

Novel Fe‐W‐Ce Mixed Oxide for the Selective Catalytic Reduction of NOx with NH3 at Low Temperatures

1
Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
2
Institute of Combustion and Power Plant Technology, University of Stuttgart, Stuttgart 70569, Germany
3
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
*
Authors to whom correspondence should be addressed.
Received: 16 January 2017 / Accepted: 16 February 2017 / Published: 20 February 2017
(This article belongs to the Special Issue Heterogeneous Catalysis for Environmental Remediation)
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Abstract

A set of novel iron doped cerium‐tungsten catalysts were prepared by sol‐gel method with a view to their application for low temperature selective catalytic reduction (SCR) of NOx with NH3 in power plants. With a molar ratio Fe/W/Ce of 0.5:1:1, a NOx reduction of >90% at 200 °C was achieved. In Fe-W-Ce catalysts with low iron oxide content, it was found that the iron compounds were highly dispersed and formed a solid solution within the cerium oxide lattice, which promoted the SCR activity. Large amounts of iron in the catalysts might form a layer of Fe2O3 on the catalyst surface, which induced the synergistic inhibition effect among Fe, Ce and W species. Moreover, the Fe‐W‐Ce catalysts possessed a high resistance to changed operation parameters as well as to deactivation by SO2 and/or H2O. The novel catalyst showed to be competitive among recently developed low‐temperature SCR catalysts. View Full-Text
Keywords: Fe-W-Ce; SCR; synergistic effect; high resistance; competitive Fe-W-Ce; SCR; synergistic effect; high resistance; competitive
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Stahl, A.; Wang, Z.; Schwämmle, T.; Ke, J.; Li, X. Novel Fe‐W‐Ce Mixed Oxide for the Selective Catalytic Reduction of NOx with NH3 at Low Temperatures. Catalysts 2017, 7, 71.

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