前驱体盐对铁钛催化剂及其脱硝性能的影响  

Effect of iron salt precursor on the Fe-Ti catalyst and their de-NO_(x) performance

作　　者：张嘉晖 蔡思翔[1,2,3] 邱学武 姜宏[1,2,3] ZHANG Jiahui;CAI Sixiang;QIU Xuewu;JIANG Hong(School of Materials Science and Engineering,Hainan University,Haikou 570228,China;Hainan Special Glass Laboratory,Hainan University,Haikou 570228,China;State Key Laboratory of Marine Resources Utilization of the South China Sea,Hainan University,Haikou 570228,China;Sinopec Hainan Refining&Chemical Limited Company,Yangpu 578101,China)

机构地区：[1]海南大学材料科学与工程学院,海南海口570228 [2]海南大学南海海洋资源利用国家重点实验室,海南海口570228 [3]海南大学海南省特种玻璃实验室,海南海口570228 [4]海南炼油化工公司,海南洋浦578101

出　　处：《洁净煤技术》2023年第1期75-82,共8页Clean Coal Technology

基　　金：海南省重点研发计划资助项目(ZDYF2020015);海南省自然科学基金青年基金资助项目(221QN0859)。

摘　　要：利用低价态铁前驱体盐(FeSO_(4))对高价铁前驱体盐(Fe(NO_(3))_(3))进行替换,制备一系列新型铁-钛复合氧化物基脱硝催化剂。在该系列催化剂中,Fe_(0.5)Fe_(0.5)TiO_(y)催化剂展现高稳定性、水硫耐受性及优异的低温活性与催化选择性等优点。通过X射线衍射(XRD)、拉曼光谱(Raman)、比表面积测试(BET)、程序升温法(H_(2)-TPR、NH_(3)-TPD、O_(2)-TPD)、X射线光电子能谱(XPS)和原位红外(In situ DRIFTs)等分析手段对催化剂进行表征。结果表明,Fe_(0.5)Fe_(0.5)TiO_(y)催化剂具有较大的比表面积(65.056 7 m^(2)/g),较高的表面可增加还原物种含量、酸性位点数量及表面活性氧浓度。此外,该催化剂表面的NH_(3)-SCR反应过程主要遵循E-R机理。A series of iron-titanium mixedoxides de-NO_(x) catalysts were prepared by replacing the Fe(NO_(3))_(3) with FeSO_(4).Among this series of catalysts,the Fe_(0.5)Fe_(0.5)TiO_(y) catalyst shows the advantages of high stability,water-sulfur tolerance,excellent low-temperature activity and catalytics electivity.The catalysts were characterized by X-ray diffraction(XRD),Raman spectroscopy(Raman),specific surface area test(BET),programmed temperature rise method(H_(2)-TPR,NH_(3)-TPD,O_(2)-TPD),X-ray photoelectron spectroscopy(XPS) and In situ infrared(In situ DRIFTs).The results show that the Fe_(0.5)Fe_(0.5)TiO_(y) catalyst has a larger specific surface area(65.056 7 m^(2)/g),more surface reducible species,more acid sites and higher surface active oxygen concentration.Additionally,it is determined that the NH_(3)-SCR reaction process on Fe_(0.5)Fe_(0.5)TiO_(y) catalyst mainly follows the E-R mechanism.

关 键 词：铁钛复合氧化物 铁前驱体盐 氨气选择性还原 脱硝催化剂 

分 类 号：TQ426[化学工程]