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《Journal of Southeast University(Natural Science Edition)》 2010-02
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Performance of low temperature De-NO_x based on Zr-Mn-Fe/Al_2O_3

Wang Xiaobo Wang Fang Yao Guihuan Gui Keting(School of Energy and Environment,Southeast University,Nanjing 210096,China)  
Zr-Mn-Fe/Al2O3 catalysts were prepared by a simple impregnation method using ZrOCl2·8H2O,Mn(NO3)2·6H2O and Fe(NO3)3·9H2O on the Al2O3 carrier.The weight fractions of loading Mn and Zr on the catalysts were individually adjusted with 2%,5%,and 10%.These catalysts were used to investigate low temperature selective catalytic reduction of NO with ammonia.The influences of metal loading and O2on the de-NOx efficiency were also studied.Mn,Fe and Zr were individually loaded on Al2O3to ascertain the main catalytic activity component.Results show that the catalyst of 5Zr-5Mn-10Fe/Al2O3 is of higher de-NOx efficiency in the simulated flue gas of 0.05% NO with a 1∶1 NH3/NO molar ratio in the presence of a volume fraction of 3.6% O2.This catalyst yields 98% NO conversion at 180℃ under the mentioned conditions and is a type of good low temperature selective catalytic reduction(SCR) catalyst.Mn is the main acting component in the process of NO removal in this catalyst,while the Zr and Fe are acting as a promoter.In addition,oxygen can significantly improve the efficiency of NO removal.
【Fund】: 国家自然科学基金资助项目(50576013)
【CateGory Index】: X701
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