%0 Journal Article
%T productionofdimethylether(dme)asacleanfuelusingsonochemicallypreparedcuoand/orzno-modifiedγ-aluminacatalysts
%A sameh
%A m.
%A k.
%A aboul-fotouh
%J 燃料化学学报
%P 350-356
%D 2014
%X ？thecatalyticconversionofmethanoltodimethylether(dme)wasstudiedovercuo/al2o3,zno/al2o3andzno-cuo/al2o3nanocatalystspreparedinpresenceorabsenceofultrasonicirradiation.thecatalystswerecharacterizedbyx-raydiffraction(xrd),surfacecharacterizationmethod(bet),scanningelectronmicroscope(sem),h2-temperatureprogrammedreduction(h2-tpr)andtemperatureprogrammeddesorptionofammonia(nh3-tpd).theexperimentalresultsshowthatduringcatalyticdehydrationofmethanoltodimethylether,theactivitiesofthecuo/al2o3,zno/al2o3andzno-cuo/al2o3catalystspreparedusingultrasonictreatmentaremuchhigherthanthosepreparedinabsenceofultrasonication.semshowsthattheuseofultrasonicationresultsinmuchsmallernanoparticles.betandxrdshowthattheultrasonicationincreasesthesurfaceareaandporevolumeofthecatalysts.h2-tprprofilesindicatedthatreducibilityofthesonicatednanocatalystsiscarriedoutatlowertemperatures.nh3-tpdshowsthatultrasoundirradiationhasenhancedtheacidityofthenanocatalystandhenceenhancedcatalyticperformancefordmeformation.
%K ultrasonication
%K methanol
%K dme
%K &gamma
%K -al2o3
%K cuo
%K zno
%U http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18378.shtml