当前位置:首页 > 行业资料 > 冶金工业 > 水热条件下利用微波加热从粉煤灰合成沸石研究
:2003-05-18:(No.49832005).1,2,2,2(1.,100083;2.,430074):NaOH,NaOH,,NaP13.15%40%.:(1)15min,30min;(2),/2.5;(3)/2.5,30min.:;;;.:X705:A:1000-2383(2003)05-0517-05:(1963-),,,2002(),,.E2mail:guoyonglong2002@163.com,.HollerWirsching[1]1985,,,[25],15,60%.,[6,7].,80200,2448h.,Querol[8],,30min.,.11.13,.,1.w(SiO2)/w(Al2O3)1.52,Alw(SiO2)/w(Al2O3).w(SiO2)/w(Al2O3).HollerWirsching[1],w(SiO2)/w(Al2O3),,..Mu2rayama[4]NaOHNa2CO3KOH.,NaOH,,KOH,NaCO3.Fernandez2Pereira[5]NaOHKOH,NaOHSi15.6g/L,KOH8.8g/L.,NaOHKOH,24h,NaOH40%,KOH20%.,,NaOH(NaOH)..1.2[SiO4][AlO4]285Vol.28No.520039EarthScienceJournalofChinaUniversityofGeosciencesSep.2003,1SiAl,4O.2.Mx/n[AlxSiyO2(x+y)]pH2O,M2/nOAl2O3xSiO2yH2O.M(NaKLi)/(CaMgBaSr),n;y/x=16,p/x=14.w(Si)/w(Al)16.,w(Si)/w(Al)1.29,w(Si)/w(Al)16,.300MHz300GHz,1000.1cm.,.,,.,.,,,,.1.31.3.1WLD4S-2()1,1000mL50mL,30cm()20cm()6cm()4.1.3.24.11000mL,250mL.12;1,2,22;3412,.,2,.1.3.3X.22.1122.2,X,(laumontite)(chabazite)NaP1(NaP1)3.,15%40%.2.22.2.121,4,1Table1Chemicalcompositionofflyashusedinthisexperiment%SiO2Al2O3Fe2O3MgOCaONa2OK2OTi2OP2O5MnOSO349.2032.374.280.845.220.661.221.290.450.030.044.40212Table2Experimentparametersandresultsofgroups1and2/mL/g/NaOH/(molL-1)//min/%12110004002.51.56195120Ca4Al8Si16O4816H2O40210004002.52.06195120(Ca,Na2K2)2Al4Si8O2412H2O30310005002.01.06195120--0410005002.02.06195120--0150202.51.576945--0250202.51.5769415NaP1Na8(AI8Si8O32)16H2O15350202.51.5769430NaP1Na8(AI8Si8O32)16H2O30450202.51.5769460NaP1Na8(AI8Si8O32)16H2O20:-.81528.,,.,11,/(L/S)2.5,NaOH1.5mol/L,,40%;2,L/S2.5,NaOH2.0mol/L,,30%.NaOH.3,4L/S2.0,NaOH1.0,2.0mol/L,.22,4,,,,,,.15,3060min,15%,30%,20%,NaP1.21124,,L/SNaOH2.5,1.5mol/L,,1000mL,6195;50mL,7694.,,.,40%;NaP1,15%30%.2.2.2/(L/S)2,112/2.5,34/2.0,,,,,30%40%..,14/2.52.0,30cm()20cm()6cm(),3.,24/2.52.0,50mL,4,,12.,4NaOH0.5,1.0,1.5,2.0mol/L.X,,.343.,,/(L/S).,().2.2.3(t)22,,,30min30%60min20%,.L/S.2,,,5min,,30min,334Table3Experimentparametersandresultsofgroups3and4/mL/g/NaOH/(molL-1)//min/%34110005002.00.5539780-0210005002.01.0539780-0310005002.01.5539780-0410005002.02.0539780-0150252.00.5638950-0250252.01.0638950-0350252.01.5638950-0450252.02.0638950-0:-.9155:,1.[9],,.,3min,.,,,,,.,1000mL,,5min,5min,,2.(1).3[9].3,Al2O3SiO2TiO2.3,.,.,NaOH,,,,,:NaOH,NaOH3.1Fig.1Changeofreactionsystemtemperaturewithheatingtimeofsynthesisofzeolitesfromflyashbymi2crowaveassistedhydrothermalalkalineactivation2Fig.2Changeofwatertemperaturewithheatingtimebymicrowaveassisted,/(L/S)(t),,,L/S,().,,,,,,,,Al2O3SiO23,Al2O3SiO2,,.,,,,,,,(),.2.32,230min,NaP130%,1120min,140%,230%,,230minNaP10%10%.,,30min,Querol[8].,:/2.5,30min,NaOH12mol/L,7792(8095).3(1),NaP13.15%40%;/2.5,30min,NaOH12mol/L,8095.(2)15min,30min02528;(3)/,,/2.5;(4)/2.5,30min,,/,,Al2O3SiO23,,.:[1]HollerH,WirschingU.Zeoliteformationfromflyash[J].FortschrMiner,1985,63(1):21-43.[2]SigerA,BergautV.Containexchangepropertiesofhy2drothermaltreatedcoalflyash[J].EnvironmentalScienceandTechnology,1995,29:1748-1753.[3]SteenbruggenG,HolimanGG.TheSynthesisofzeolitesfromflyashandthepropertiesofthezeoliteproducts[J].JournalofGeochemicalExploration,1998,62(1-3):305-309.[4]MurayamaN,YamamotoH,ShibataJ.Zeolitesynthesisfromcoalflyashbyhydrothermalreactionusingvariousal2kalisources[A].PROGRESworkshoponnovelproductsfromcombustionresidues[C].Morella,Spain:ECThe2maticNetwork,2001.137-142.[5]Fernandez2PereiraC,LunaGalianoY,ValeJ,etal.Ze2olitisationofpulverizedcoalflyash:Utilizationofthere2sultingmaterialsasimmobilizingagentofmetallurgicalwaste[A].PROGRESworkshoponnovelproductsfromcombustionresidues[C].Morella,Spain:ECThematicNetwork,2001.181-186.[6]QuerolX,MorenoN,UmanaJC,etal.Applicationofzeoliticmaterialsynthesisfromflyashtothedecontamina2tionofwastewaterandfluegas[J].JournalofChemicalTechnologyandBiotechnology,2002,77:292-298.[7]JuanR,HernandezS,QuerolX,etal.Zeoliticmaterialsynthesizedfromflyash:Useascationicexchanger[J].JournalofChemicalTechnologyandBiotechnology,2002,77:299-304.[8]QuerolX,AlastueyA,Lopez2SolerA,etal.Afastmethodforrecyclingflyash:Microwave2assistedzeolitesynthesis[J].EnvironmentalScienceandTechnology,1997,31(9):2527-2533.[9].[M].:,1999.89-93,110-117.JINQH.Microwavechemistry[M].Beijing:SciencePress,1999.87-93,110-117.SynthesisofZeolitesfromFlyAshbyMicrowaveAssistedHydrothermalAlkalineActivationGUOYong2long1,WANGYan2xin2,CAIHe2sheng2,YANGZhi2hua2(1.KeyLaboratoryofCoalResources,MinistryofEducation,ChinaUniversityofMiningandTechnolo2gy,Beijing100083,China;2.FacultyofEngineering,ChinaUniversityofGeosciences,Wuhan430074,China)Abstract:NaOHwatersolutionischosenasanoriginalreactantbychangingtheparameterssuchasacti2vationtemperature,thicknessofNaOHwatersolutionandsynthesistime.Inaddition,theflyashcanbeheatedupanddirectlycrystallized,ontheconditionofhydrothermalalkalineactivation,byusingmicrowave.Asaresult,threekindsofzeolitesaresynthesized:laumontite,chabaziteandNaP1zeolites.Theratiooftranslatingflyashintozeolitesis15%-40%.Theresearchshowsthefollowingthreeresults:(1)zeolitescanbesynthesizedforabout15min,andthebestratiooftranslatingflyashintozeolitescanbeachievedfora
本文标题:水热条件下利用微波加热从粉煤灰合成沸石研究
链接地址:https://www.777doc.com/doc-327013 .html