%0 Journal Article
%T methanolconversiontodmeasabluefuel:thebeneficialuseofultrasonicirradiationforthepreparationofcuo/h-mornanocatalyst
%A sameh
%A m.
%A k.
%A aboul-fotouh
%J 燃料化学学报
%P 1340-1350
%D 2014
%X ？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.
%K ultrasonication
%K methanol
%K dme
%K h-mor
%K cuo
%U http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18523.shtml