%0 Journal Article
%T effectofultrasonicirradiationand/orhalogenationonthecatalyticperformanceofγ-al<sub>2</sub>o<sub>3</sub>formethanoldehydrationtodimethylether
%A sameh
%A m.
%A k.
%A aboul-fotouh
%J 燃料化学学报
%P 1077-1084
%D 2013
%X ？dimethylether(dme)isamongstoneofthemostpromisingalternative,renewableandcleanfuelsbeingconsideredasafutureenergycarrier.inthisstudy,thecomparativecatalyticperformanceofthehalogenatedγ-al2o3preparedfromtwohalogenprecursors(ammoniumchlorideandammoniumfluoride)ispresented.theimpactofultrasonicirradiationwasevaluatedinordertooptimizeboththehalogenprecursorfortheproductionofdmefrommethanolinafixedbedreactor.thecatalystswerecharacterizedbysem,xrd,betandnh3-tpd.underreactionconditionswherethetemperaturerangedfrom200to400℃withawhsv=15.9h-1wasfoundthatthehalogenatedcatalystsshowedhigheractivityatallreactiontemperatures.however,thehalogenatedaluminacatalystspreparedundertheeffectofultrasonicirradiationshowedhigherperformanceofγ-al2o3fordmeformation.thechlorinatedγ-al2o3catalystsshowedahigheractivityandselectivityfordmeproductionthanfluorinatedversions.
%K ultrasonication
%K methanol
%K dme
%K &gamma
%K -al2o3
%K cl
%K f
%U http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18267.shtml