Kinetics of methanol to olefins over AlPO4-bound ZSM-5 extrudates in a two-stage unit with dimethyl ether pre-reactor

Kinetics of methanol to olefins over AlPO4-bound ZSM-5 extrudates in a two-stage unit with dimethyl ether pre-reactor

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时间:2019-06-03

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1、MicroporousandMesoporousMaterials164(2012)172–181ContentslistsavailableatSciVerseScienceDirectMicroporousandMesoporousMaterialsjournalhomepage:www.elsevier.com/locate/micromesoKineticsofmethanoltoolefinsoverAlPO4-boundZSM-5extrudatesinatwo-stageunitwithdimethyletherpre-reactorMarkusMenges

2、,BettinaKraushaar-Czarnetzki⇑InstituteofChemicalProcessEngineeringCVT,KarlsruheInstituteofTechnology,Kaiserstrasse12,D-76128Karlsruhe,GermanyarticleinfoabstractArticlehistory:Thefixed-bedconversionofmethanoltoolefinswasinvestigatedinatwo-stageseries-flowunit.ThefirstAvailableonline14July2012

3、reactorwithc-Al2O3catalystconvertedmostofthemethanoltodimethyletherandwatervapor(DMEpre-reactor).ThesecondreactorproducedhydrocarbonsandcontainedanextrudedcatalystconsistingofKeywords:H-ZSM-5(Si/Al=250)embeddedinanovelmacroporousmatrixofAlPO4withtridymitestructure.Pro-Methanoltoolefins(MT

4、O)cessingexperimentswerecarriedoutoverawiderangeofconversionsatreactiontemperaturesfromKinetics400°Cto450°C,andundervariationofthemethanolconcentrationsinthefeedbetween10%and34%Co-feeding(v/v).Additionalco-feedingexperimentswithethene,propeneoriso-butene,respectively,deliveredExtrudedZSM

5、-5insightsintosecondaryreactions.TheexperimentaldatawereusedtodevelopakineticmodelbasedMacroporousAlPO4-matrixonlumpswhichdescribeswelltheMTOreactionsatconditionsclosetoindustrialpractice.Ó2012ElsevierInc.Allrightsreserved.1.IntroductionrousAlPO4bindermatrixenhancestheinternalmasstranspo

6、rt,whichcouldimprovetheyieldoftheintermediateproducts.InTheconversionofmethanoltoolefins(MTO)representsameth-additionwiththeuseofapre-reactorfortheconversionofmeth-odofproducingtheimportantbasechemicalsethyleneandpro-anoltodimethylether(DME),thecatalystlifetimecanbeim-pylenefromcarbonreso

7、urcesotherthancrudeoil,suchasproved.ThepreparationandcharacterizationofAlPO4/ZSM-5naturalgas,coalorbiomass.Sincedecadeslargeresearcheffortsextrudateshasbeenpublishedearlier[5,6].havebeentakenfortheoptimizationofthereactiontoboth,ole-KineticmodelingoftheMTO-processhasbeent

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