原位漫反射傅里叶变换红外光谱研究锰铁基催化剂上低温选择性催化还原反应机理.pdf

《原位漫反射傅里叶变换红外光谱研究锰铁基催化剂上低温选择性催化还原反应机理.pdf》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、ChineseIournalofCatalysis35(2014)294—301催化学报2014年第35卷第3期1www．chxb．cn嚣l蔫l黪霉妻、^f童霉j。毪盏誊秘l魏⋯

2、叠ll薯蠢；蠹曩ll：～ll一。jou凄nailhp

3、mep霉群wwlw：Ieol／Ioc，chnjc⋯--舞蠢ArticleInsituDRIFTSstudyofthemechanismoflowtemperatureselectivecatalyticreductionovermanganese-lironoXl■clIesTingChenBin

4、Guan，HeLin，LinZhuKeyLaboratory厂orPowerMachineryandEngineeringofMinistryofEducation,ShanghaiJiaoUniversiShanghai200240,ChinaARTICLEINF0ABSTRACTArticlehistory：ToinvestigatethemechanismofselectivecatalyticreductionfSCR]ofNOxwithNH3，Received21August2013Ti00Mn00sFeoo502．

5、6catalystwaspreparedbyselF．pr0pagatinghigh-temperaturesynthesis(SHS)Accepted15October2013methodandevaluatedat25—450。C．ThecatalystwascharacterizedbyX—raydiffractionfXRD]andPublished20March2014transmissionelectronmicroscopyrTEM)．ThepossibleSCRmechanismoverTi09MnoosFeo

6、0502．wasstudiedbyinsitudiffusereflectanceinfraredFouriertransformspectroscopy(DRIFTS)．Tio9Mn0．osre0o502．showedbothhighSCRactivityandN2selectivityoverabroadtemperaturewin-Keywords：dowof100—350。C．TheXRDandTEMresultsindicatedthattheactivecomponentsofMnandFeNitrogenOxid

7、ewereinahighlydispersedstateandlnanamorphousformonTiO2．TheDRIFTSresultsrevealedAmmoniathatBrOnstedacidsitesweretheactivecentersforN0remoralandmonodentatenitratesweretheManganese-ironcatalystskeyintermediateintheSCRreaction．At150。C．bothLangmuir—HinshelwoodandEley-Rid

8、ealLowtemperatureselectivecatalyticmechanismsareinvolvedintheSCRreaction．whiletheformeronemechanismdominatesthecata—reductionlyticactivityofTio9Mn0osFeoo502．6．Additionaly,thepresenceof02significantlyaffectsNOoxidationInsitudiflusereflectanceinfraredandcoordinatedNH3

9、activation．Fouriertransformspectroscopy@2014，DalianInstituteofChemicalPhysics，ChineseAcademyofSciences．PublishedbyElsevierB．V．Allrightsreserved．1．IntroductionandshowsstableNOconversionandN2selectivity，evenafter10daysoftime—on-streaminthepresenceof11vo1％waterNitrogen

10、oxides(N0areamajorcomponentofairpoilu。vaporat175。C．However,thelowtemperatureSCRperfor—tion．Selectivecatalyticreduction(SCR}ofN0xwithNH3isa