钇掺杂三氧化二铁催化剂的脱硝性能研究  

Study on denitration performance of Y doped Fe_(2)O_(3) catalyst

作　　者：杜沛佞 罗仕忠[1] 谭仁俊 敬方梨 DU Peining;LUO Shizhong;Tan Renjun;JING Fangli(School of Chemical Engineering,Sichuan University,Chengdu 610065,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University)

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]西南石油大学化学化工学院

出　　处：《无机盐工业》2022年第11期137-142,共6页Inorganic Chemicals Industry

摘　　要：为提升三氧化二铁(Fe_(2)O_(3))催化剂的脱硝性能,扩展催化剂的活性温度窗口,采用共沉淀法引入助剂钇(Y)元素对Fe_(2)O_(3)催化剂进行改性。通过X射线衍射(XRD)、氮气等温吸-脱附(N_(2)-BET)、X射线光电子能谱(XPS)、氨气程序升温脱附(NH_(3)-TPD)、氢气程序升温还原(H_(2)-TPR)等表征方法对样品进行了表征分析。XRD和N_(2)-BET结果表明,Y的掺杂使催化剂结构发生变化,比表面积增加、孔径减小。XPS和NH_(3)-TPD结果证明,Y掺杂Fe_(2)O_(3)具有更多的表面吸附氧(O_(Ⅰ))、Fe^(2+)以及更多的酸量。H_(2)-TPR结果表明,Y的掺杂使催化剂的氧化还原能力略有下降。测试了不同含量Y掺杂的Fe_(2)O_(3)催化剂在150~400℃的脱硝性能,其中Fe_(9)Y_(1)O_(x)催化剂的脱硝活性最佳,在300℃达到81.8%。In order to improve the denitration performance of Fe_(2)O_(3)catalyst and expand the active temperature window of the catalyst,the co-precipitation method was used to introduce the promoter Y to modify the Fe_(2)O_(3)catalyst.The samples were characterized by X-ray diffraction(XRD),N_(2)isothermal adsorption desorption(N_(2)-BET),X-ray photoelectron spectroscopy(XPS),NH_(3)temperature programmed desorption(NH_(3)-TPD)and H_(2)temperature programmed reduction(H_(2)-TPR).The XRD and N_(2)-BET results showed that doping of Y changed the catalyst structure,increased the specific surface area and reduced pore size of the catalyst.The XPS and NH_(3)-TPD demonstrated that Y-doped Fe_(2)O_(3)had more surface adsorbed oxygen(O_(I)),Fe^(2+)and more acid amount.The H_(2)-TPR results showed that Y doping slightly reduced the redox ability of the catalyst.The denitration performance of Fe_(2)O_(3)catalysts doped with different contents of Y at 150~400℃was tested.Fe_(9)Y_(1)O_(x )catalyst had the best denitration activity,reaching 81.8%at 300°C.

关 键 词：钇 脱硝催化剂 三氧化二铁 

分 类 号：O643.3[理学—物理化学]