催化化学课件英文版.ppt

《催化化学课件英文版.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、2003.1.14申文杰催化反应化学课题组CatalyticReactionChemistryGroup固体催化剂的研究方法Ⅱ催化反应的动态监测技术多相催化研究方法实际催化剂模型催化剂合成表征反应反应动力学探索催化反应本质引导实际催化材料的发展真空表面分析技术PressureGapMaterialsGap发展高效催化剂催化反应动力学稳态动力学技术瞬态动力学技术建立反应速率和操作条件参数间的定量关系，提出正确的反应机理，预测反应条件时的速率变化。LHHW型：吸附---表面反应---脱附稳态同位素瞬态动力学--SSITKA一个或多个

2、快速变化的状态变量引如系统并跟踪发生的系统变化。温度----程序升温技术同位素示踪产物瞬时分析技术（TPA）瞬变应答技术（TransientResponse)光谱跟踪技术MonitoringofReactionsMidInfraredSpectroscopyTheideaisthatthecharacteristicpeakforeachcompoundthatisIRactivechangeswithtimeandthischangecanthenbeusedtofollowthereactionNearInfraredSpe

3、ctroscopyOneproblemwithNIRisthatcompoundsoftendonotexhibithighlycharacteristicpeaks,andoftenthechangesaremoresubtleandinsmallregionsofthespectrumUV/visspectroscopyRamanspectroscopyRamanspectroscopyprobeshavebecomefashionable.ThistechniqueisanalternativetoMIR,butthere

4、lativeintensitiesofbandsdifferinthetwotechniques,however,manyofthesamemethodscanbeemployedtoanalysethedata.SummaryofmaindataanalysistechniquesThefollowingdataanalyticaltechniquesaremostcommonfortheanalysisofon-linespectroscopicdatafromreactionsusingdifferentspectrosc

5、opies.MIRandRaman.Generallyconventionalkineticcurvefittingofpeakareas,butsomedeconvolutionnecessaryifoverlappingpeaks.NIR.UsuallymultivariatecalibrationsuchasPLSandanumberofrelatedclassicalchemometricsmethods.EAS.DeconvolutionusingMLR(multiplelinearregression)andpure

6、standards,plusmultivariatecalibration.Ofcourselifeisneversosimpleandsomequitesophisticatedapproacheshavebeendevelopedinrecentyearstoextractmoreinformationfromthesehighlyinformativebutsophisticateddatamatricesaswillbediscussedinthenextarticle.Itisofinteresttoconsidert

7、hewaysinwhichthepresenceofzirconiaeitherasasupportoranadditiveenhancestherateofmethanolsynthesis.zirconiapromotestherateofmethanolformationoccurringonthesurfaceofCu,oralternativelyCupromotesthesynthesisofmethanoloverzirconia.Whichofthesetwooptionsoffersthemostplausib

8、leexplanation.In-SituInfraredStudyofMethanolSynthesisfromH2/CO2overCu/SiO2andCu/ZrO2/SiO2IanA.FisherandAlexisT.Bell,JOURNALOFCATALY