Fe_(2)O_(3)/SiC催化剂低温下用NH_(3)选择性催化还原NO  

The research on Fe_(2)O_(3)/SiC for the selective catalytic reduction of NO with NH_(3) at low temperature

作　　者：白书立 薛瑶佳 李换英 罗涛 张晓玉 Bai Shuli;Xue Yaojia;Li Huanying;Luo Tao;Zhang Xiaoyu(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：《河南师范大学学报（自然科学版）》2021年第5期83-88,共6页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(21006065);江门市科技局基础与理论科技计划项目(2020JC01021).

摘　　要：采用湿化学浸渍的方法制备了碳化硅负载的三氧化二铁催化剂.通过扫描电镜(SEM)、元素分析(EDS)、X-射线衍射仪(XRD)、X-射线光电子能谱(XPS)和NH_(3)的程序升温还原方法(NH_(3)-TPD)对所制备样品进行了表征,研究了Fe_(2)O_(3)/SiC催化剂在低温下(≤300℃)利用NH_(3)选择性催化还原NO的性能.结果表明,Fe_(2)O_(3)以非晶态的形式或以单层的形式分散在SiC表面,Fe_(2)O_(3)/SiC催化剂具有较高的低温催化活性,当Fe_(2)O_(3)负载量为10%(质量分数),反应温度为250℃时,NO的转化率达到91.3%,催化反应主要遵循Eley-Rideal机理.Silicon carbide supported ferric oxide catalysts(Fe_(2)O_(3)/SiC)were prepared by using wet chemical impregnation method.The properties of as-made samples were characterized by SEM,EDS,XRD,XPS and NH_(3)-TPD in details,and the Fe_(2)O_(3)/SiC catalysts were employed for selective catalytic reduction(SCR)NO with NH_(3) at low temperature(≤300℃).The results show that Fe_(2)O_(3) may be dispersed on the surface of SiC in the form of an amorphous state or as a single layer.The Fe_(2)O_(3)/SiC catalysts exhibited high activity at low temperature,and the removal efficiency of NO reached 91.3%under the conditions of the Fe_(2)O_(3) loading is 10%(mass fraction)and the reaction temperature is 250℃.Catalytic reaction follows the reaction mechanism of Eley-Rideal.

关 键 词：碳化硅 Fe_(2)O_(3) 还原NO 低温 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]