简介：Inthisstudy,titaniumdioxidesupportedbymulti-walledcarbonnanotubes(MWCNTs/TiO2)andCr-dopedTiO2supportedbyMWCNTs(MWNTs/Cr-TiO2)weresynthesizedbythesol-gelmethod.Thepreparedsampleswerecharacterizedbytransmissionelectronmicroscopy,X-rayphotoelectronspectroscopy,X-raydiffraction,theBrunauerEmmett-Telleranalysis,andtheRamanspectroscopy.TheoxidationandefficiencyforremovalofSO2inasimulatedfluegaswereinvestigatedexperimentallyinafixed-bedreactor.The15%MWCNTs/Cr-Ti02sampledisplayedexcellentadsorptionproperties,andaSO2removalrateequatingto30.4151mg/gfromthesimulatedfluegascontaining2300μg/gofSO2,8%of02,and5%ofH20wasachievedunderoptimalconditionscoveringatemperatureof333.15K,andaspacevelocityof1275h^-1.TheadsorptionprocesswasenhancedbecauseCrdopingmodifiedtheporestructureandinhibitedthegraingrowthofTiO2.Inaddition,theFreundlichandLangmuirmodelsrevealedthatSO2wasmainlyadsorbedthroughchemicaladsorptiononthesamplesurfaces,andthethermodynamicmodelanalysisindicatedthattheadsorptionwasaspontaneous,exothermic,andentropy-reducingprocess.TheadsorptionkineticsofSO2canbedescribedbythepseudosecond-orderkineticandtheBanghamdynamicsmodels.Thepossiblereactionmechanisminvolvedindesulfurizationprocesswasalsoproposed.

简介：南海东部油田勘探过程中,部分储集层发现非烃CO2气层,由于目前尚未形成CO2气层商业开发,快速识别CO2气层对于勘探开发决策有着非常重要的作用。受CO2物理、化学性质和钻井液等因素影响,录井过程中CO2数值较低,甚至出现无值的现象,仅使用录井手段,对CO2的识别存在较大的困难。通过分析有取样证实的6口井CO2储集层资料,提出了综合利用录井和随钻测井资料快速识别CO2气层的新方法,而且现场应用中解决了南海东部油田CO2气层评价难的问题,取得了非常好的效果。

简介：AninnovativeapproachtoH2Scapturehasbeendevelopedusingseveralmetal-basedionicliquids([Bmim]Cl·CuCl2,[Bmim]Cl·FeCl3,[Bmim]Cl·ZnCl2,[Bmim]Br·CuCl2,and[Bmim]Br·FeCl3)immobilizedonthesol-gelderivedsilica,whichissuperiortopurelyviscousionicliquidwithacruciallimitofhightemperature,lowmasstransferrate,andmassloss.TheadsorbentswerecharacterizedbytheFouriertransforminfraredspectrometer,transmissionelectronmicroscope,N2adsorption/desorption,X-rayphotoelectronspectroscopy,andthermalanalysistechniques.TheeffectsofthemetalandhalogeninIL,theloadingamountofIL,andtheadsorptiontemperaturewerestudiedbydynamicadsorptionexperimentsatagasflowrateof100mL/min.TheH2Sadsorptionresultshaveshowedthattheoptimaladsorbentandadsorptiontemperatureare5%[Bmim]Cl·CuCl2/silicageland20-50℃,respectively.H2Scanbecapturedandoxidizedtoelementalsulfur,and[Bmim]Cl·CuCl2/silicagelcanbereadilyregeneratedbyair.TheexcellentefficiencyofH2Sremovalmaybeattributedtotheformationofnano-scaledandhigh-concentration[Bmim]Cl·CuCl2confinedinsilicagel,indicatingthattheimmobilizationof[Bmim]Cl·CuCl2onthesol-gelderivedsilicacanbeusedforH2Sremovalpromisingly.