简介：ThemaindisadvantageofmicroporousSSZ-13catalystusedinthemethanoltoolefins(MTO)processisitsrapiddeactivationduetoitsrelativelylowcokeresistance.Meanwhile,thehierarchicalzeolitesusuallyexhibitimprovedcatalyticstabilitythankstotheirbettermasstransferability.Herein,thehierarchicallynanoporousSSZ-13zeoliteswereone-potsynthesizedbyusingN,N,N-trimethyl-1-adamantanammoniumhydroxideasamicroporousstructuredirectingagentandC18H37N+(CH3)2C6H12N+(CH3)2C6H13(Br-)2(hereinafterabbreviatedasC18-6-6Br2)asamesoporogen.ThehierarchicallynanoporousSSZ-13catalystwascharacterizedbyXRD,N2physisorption,SEM,TEM,TG-DTG,27Aland29SiNMRspectroscopyandNH3-TPDtechniques.TheresultsshowedthatthehierarchicalSSZ-13zeolitesynthesizedinthepresenceoftheC18-6-6Br2surfactantexhibitsaggregatesofprimarynanocrystalsandcontainsthewell-developedmesoporesandexcellentacidity.Comparedtoitsconventionalcounterpart,thehierarchicalSSZ-13zeolitehaslongercatalyticlifetimeandhigherselectivityforethyleneandpropyleneintheMTOreaction,whichcanbeattributedtothesynergisticeffectoftheirgoodacidityandimproveddiffusionpropertiesresultedfromthehierarchicalporestructure.

简介：研究了循环烷烃净化过程中吸附剂13X分子筛的再生工艺。冲洗剂选用低碳直链烷烃(代号WV)，最佳冲洗操作条件：塔温80℃，冲洗剂空速2.25h-1；脱附剂选用芳烃(代号DV)，最佳脱附操作条件：塔温150℃，脱附剂空速1.5h-1。结果表明，上述条件下，脱附剂可将所吸附的芳烃类杂质充分地脱附，吸附剂13X分子筛再生效果良好。