碳化硅负载氧化铜催化剂低温NH3选择性催化还原NOx的性能  

Silicon carbon-supported copper oxide catalysts for the selective catalytic reduction of NOx with NH3 at low temperature

作　　者：白书立 张晓玉 薛瑶佳 李换英 郏建波 BAI Shu-li;ZHANG Xiao-yu;XUE Yao-jia;LI Huan-ying;JIA Jian-bo(School of Biotechnology and Health Sciences,Wuyi University,Jiangmen 529020,China)

机构地区：[1]五邑大学生物科技与大健康学院,广东江门529020

出　　处：《燃料化学学报》2020年第6期723-727,I0006,共6页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21006065)资助。

摘　　要：采用湿浸渍法制备了碳化硅负载的氧化铜(CuO/SiC)催化剂,采用扫描电镜(SEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)等对其进行了表征,在模拟烟气条件下研究了该催化剂对低温NH3选择性催化还原NOx的性能。结果表明,CuO/SiC还原NO的催化活性与氧化铜含量和反应温度有关。负载质量分数为5%的CuO/SiC催化剂在低温下表现出较高的活性,虽然SO2对其催化活性略有抑制;研究发现,NO还原反应发生在被吸附的氨与气相的NO或弱吸附的NO之间。所制备的CuO/SiC催化剂为实际的工业应用提供了新的选择。Silicon carbide supported copper oxide(CuO/SiC)catalysts were prepared by wet impregnation method and characterized by scanning electron microscope(SEM),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS);their catalytic performance in the selective catalytic reduction of NOx with NH3 at low temperature was investigated with a mimic flue gas.The results indicate that the catalytic performance of CuO/SiC in the selective catalytic reduction NO with NH3 is related to the loading of copper oxide and reaction temperature.The CuO/SiC catalyst with a CuO loading of 5%exhibits high activity at low temperature,where SO2 shows slightly inhibition upon the NO reduction activity;the NO reduction reaction over CuO/SiC may take place between the adsorbed ammonia and the gaseous or weakly adsorbed NO.Such CuO/SiC catalysts may provide a new choice for the practical removal of NOx in industry.

关 键 词：选择性催化还原 碳化硅 铜氧化物 氨 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]