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OALib Journal期刊
ISSN: 2333-9721
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methanolconversiontodmeasabluefuel:thebeneficialuseofultrasonicirradiationforthepreparationofcuo/h-mornanocatalyst
, PP. 1340-1350
Keywords: ultrasonication,methanol,dme,h-mor,cuo
Abstract:
？methanolconversiontodmewasinvestigatedovercuo/h-mornanocatalystpreparedbyprecipitationand/orbyprecipitationflowedbyultrasonicirradiationmethods.bet,xrd,sem,nh3-tpdandh2-tprtechniqueswereusedtocharacterizenanocatalysts.theeffectiveultrasonicationfactorsencounteredduringcarryingoutthedehydrationofmethanoloncuo/h-morzeolitecatalyststoproducedimethyletherarestudiedinthepresentwork.thesefactorsinclude:thetypeofultrasonicationmedia,theultrasonicationtime,andthefixedweightofthesolidcatalystperthevolumeoftheultrasonicationliquidmedia(wcatalyst/vliquidratio).xrdshowedthatstructureofh-morisnotdamagedevenafteritisloadedwithcuonanoparticlesorwithultrasonication.h2-tprprofilesindicatedthatreducibilityofsonicatedcuo/h-mornanocatalystishigherthannon-sonicatedcatalyst.itisfoundthatemployingultrasoundenergyfor60minhasthehighestinfluenceonthesurfacepropertiesofnanocatalystanditscatalyticperformance(activityandstability)ofcuo/h-morcatalyst.surfacemorphology(sem)ofthesonicatedcuo/h-morcatalystshaveclarifiedthatmethanolbyitselfusedasanultrasonicationmediumgivesthebestresultsconcerningthehomogeneityofparticlesizescomparedtothenon-sonicatedcatalyst,wherelargeagglomeratesandnon-homogeneousclustersappeared.waterusedasasonicationmediumshowedmanylargeagglomeratesinadditiontosomesmallerparticlesresultedinlowcatalyticactivity.thedifferentalcoholsand(wcatalyst/vliquid)ratiowereexaminedtogiveprecisecorrelationwiththecatalyticactivityofthesonicatedcuo/h-morzeolitecatalyst.thesefindingscertifiedthatultrasonicationhasadeepeffectonthesurfacemorphologyandhenceonthecatalyticbehaviorofthedehydrationofmethanoltodme.nh3-tpdshowsthatultrasoundirradiationhasenhancedtheacidityofcuo/h-morcatalystandhenceit'scatalyticperformancefordmeformation.
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