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


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


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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.



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





Autor: Anna Stahl 1,2, Zhong Wang 1,* , Tobias Schwämmle 2, Jun Ke 3 and Xuebing Li 1,*

Fuente: http://mdpi.com/



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