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1、Propanedehydrogenation…ThapliyalandDeo,BulletinoftheCatalysissocietyofIndia2(2003)29-33PropaneDehydrogenationoverAluminaSupportedChromiaCatalystsShivajiThapliyalandGoutamDeo*DepartmentofChemicalEngineering,IndianInstituteofTechnology-KanpurKanpur208016,India______________________________________
2、_____________________________________AbstractDifferentalumina-supportedchromiacatalystswerepreparedbyvaryingthechromiumoxide2loadingfrom3.6to17µmolCr/m.Previouscharacterizationstudiesonthecatalysts2revealedthatthemonolayerlimitwas~9µmolCr/m.Thedifferentcatalystsweretestedandfoundtobeactiveforthe
3、dehydrogenation(DH)ofpropane.Propenewasformedonallthechromiasupportedcatalystsamples.Therateofpropaneconvertedincreasedwithchromiumoxidecontenttillmonolayerlimitandthendecreased.Interestingly,thisbehaviourparalleledtherateofpropaneconvertedduringtheoxidativedehydrogenation(ODH)ofpropanesuggestin
4、gthattheactivesitesfortheDHandODHreactionsoriginatefromthesamesurfacechromiumoxidespecies.Keywords:Dehydrogenation,Chromia,Alumina,Propane,Propene,Surfaceactivesites,Catalyst,Precursor,Surfacearea,Loading,OxidativeDehydrogenation___________________________________________________________________
5、________Tel.No.:+91-512-2597881,2597363,FaxNo.:+91-572-2590104E-mail:goutam@iitk.ac.in1.IntroductiontechniqueshaverevealedthattheDehydrogenationofalkanesintotheirsupportedchromiacatalystshavetwo-correspondingalkenesisanindustriallydimensionalsurfacespeciesbelowsignificantprocedureasthedemandofmo
6、nolayerconcentrationanditisbelievedalkeneshasincreased.Alkenes,especiallythatthesearetheactivesitesinmostethaneandpropane,areimportantreactions.feedstocksforthepetrochemicalindustry.SeveralstudieshavefocusedontheDHofSeveraltransitionandnoblemetaloxidesalkanesoveraluminasupportedchromiahavebeensu
7、ccessfullyemployedascatalysts.Rossietal.[3]studiedpropanecatalystsfordehydrogenationreactions.DHonchromia-aluminaandsuggested+3ThecommonlyusedcatalystsarethatmononuclearCrwithtwosupportedorunsupportedPt,Pd,Sn,V-coordinativev
