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时间:2020-03-26
《Al-PILR催化剂制备及其选择催化还原NO.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第4O卷第9期燃料化学学报Vo1.40NO.92012年9月JournalofFuelChemistryandTechnologySep.2012文章编号:0253-2409(2012)09·1121-07Cu/Dy/S2一/A1-PILR催化剂制备及其选择催化还原NO郭锡坤,李式伟,郭伟斌(1.汕头大学理学院,广东汕头515063;2.汕头大学医学院第一附属医院,广东汕头515041)摘要:采用累托土为原料,合成铝交联累托土(A1一PILR),然后分步浸渍负载(NH4)so、Dy(NO),和Cu(NO,),制成Cu/Dy/SO:一
2、/A1一PILR催化剂。考察该催化剂对C3H6选择性还原NO的催化性能,并且利用低角XRD、BET、Py—IR、IR、TG和SEM等方法,研究催化剂结构与性能的关系。实验结果表明,铝交联剂能很好地撑开累托土的土层,显著增大催化剂的比表面积;s:0’能明显增加铝交联累托土B(Brt~nsted)酸的酸量;Dy能进一步增加B酸的酸量,有效提高催化活性和热稳定性。因此,Cu/Dy/S0;一/A1一PILR催化剂具有良好的催化性能,最佳催化活性温度为300℃,NO转化率高达80.3%,在有10%水蒸气存在的情况下仍可达77.6%。关键词:S
3、,o28一改性;镝;铝交联累托土;NO;选择性还原中图分类号:0634.3文献标识码:APreparationofCu/Dy/S20一/A1-PILRcatalystanditscatalyticperformanceforselectivereductionofNOGU0Xi—kun,LIShi-wei,GU0Wei—bin(1.CollegeofScience,ShantouUniversity,Shanwu515063,China;2.eFirstAffiliatedHospitalofShantouUniversityMed
4、icalCollage,Shantou515041,China)Abstract:Byusingrectoriteas1Tawmaterials,theA1一pillaredrectorite(A1-PILR)wassynthetized,thenthecu/Dy/s20;/AI-PILRcatalystwaspreparedbyloadingof(NH4)2s2O8,Dy(No3)3andCu(NO3)2ontotheAI-pillaredrectoritestepbystep.Thecatalyticperformanceoft
5、hecu/Dy/s20/A1一PILRcatalystontheselectivecatalyticreductionofNOwithpropylenewasinvestigated.Therelationshipbetweenthestructureandtheperformanceofthecu/Dy/s2O/A1一PILRcatalystwasalsoexploredbymeansofLow—angleX—raydiffraction(L(RD),Surfaceareameasurements(BET),Pyridineabs
6、orptioninfaredspectrum(Py一),Infraredspectroscopy(IR),Thermalgravimetricanalysis(TG)andScanningelectronmicroscope(SEM).TheexperimentalresultsindicatedthattheAIpillaringagentcouldeffectivelyinsertintothelayerofrectoriteandremarkablyenlargethespecificsurfacearea,andS,OR。c
7、ouldobviouslyincreasetheBrsnstedacidamountoftheAl—pillaredrectorite.DYcouldfurtherincreasetheBrsnstedacidamounttoimprovethecatalyticactivityandthermalstabilityeffectively.Therefore。theCu/Dy/S,O一/A1.PILRcatalystexhibitedexcellentcatalyticperformance.TheNOconversionwasup
8、to80.3%at300℃and77.6%evenatthepresenceof1O%volumefractionofwatervapor.Keywords:s20一modification;Dy;A1一pillaredrectori
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