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:2006211222;:20072032101:(:T0502);(:05E220).:(19812),,,,.E-mail:fuyun24@21cn.com.CO2CH4,,,,(,200093):,,CO2,CO2CH4,,:;;;:TE35714:A:167221926(2007)0220317204,()[1],,I,26(512),122(51262)VanderWaals[2],(4.36~)(5.10~)(5.86~),(5.12~)(5.86~),CH4,,CH42,2111016m3,252CH4CO2,CH4CO221,CH415%,CO2,CH499%,CH43000,CH4,,,1,,,,,,3:,,()1,CH480%,,,,,20,,CH418220074NATURALGASGEOSCIENCEVol.18No.2Apr.20071(),,,,,,,,,,,,CH4[324],,CO2,Ebinuma[5]Ohgaki[6]CO2CH4,2CO2CH42.11CO2CH41CO2CH45:,,(),,,,CH4,,,CH4CO2,CO2H2O,,CO2,CH4,CO2,CH4,CO2,CO2,,CH4[7],2.2CO2CH4(1),CO2CH4:CH4CO2,;,Gibbs,;,CH4CO2,CH4CO2,CH4CO2Anderson[8]CH4CO2H2O(--),283K,AkihiroHachikubo[9]CH4CO22,,CH4,,CO2813Vol.182CO2-CH4,Gibbs,$G02[2],298K0.1MPa,CO2CH4,2CH4CO2,(105m3öm3)(kJömol)(kJömol)(kJömol)CH42.48-13.26-44.555CO260.8-19.34-65.234,MasakiOta[10],271.2275.2K3.25MPa10h,14.5kJömol,73.3kJömol,CO2CH4Gibbs,Ohgaki[6]MasakiOta[10],,CH4,CO2,,,3MasakiOtaCH4CO2,,CH4CO2,,Smith[11],CH4CO2,,,,CO233.25MPa(2),,CO2CH4,CO2,3MasakiOta[12]3.6MPa273.2K,,,McGrail[13]CO2,H2O3CH4CO2[14]CH4(mmol)(mmolö(cm2h))CO2(mmol)(mmolö(cm2h))4334.50.0258824.70.018539347.70.0165538.80.0134611468.40.0193542.80.0121118470.50.0123671.20.0124830766.20.0070057.60.00610,,,MasakiOta[12],,,913No.2:CO2CH4[12],,24442,CO2CH4,CO2,1ö4CH4,CO2CH4100%3CO2CH4CO2,,CH4,,CO2CH4,,,,:[1]KvenvoldenKA.MethaneHydrate-amajorreservoirofcar2bonintheshallowgeosphere?[J].ChemGeol,1988,71:41251.[2]SloanED.Clathratehydratesofnaturalgases[M].NewYork:MarcelDekker,1998.[3],.[J].,2001,12(1):3210.[4],,,.[J].,2005,16(5):6802683.[5]EbinumaT.Methodfordumpinganddisposingofcarbondioxidegasandapparatustherefore[P].US5261490,1993.[6]OhgakiK,SangawaH,MatsubaraT,etal.Methaneexplo2itationbycarbondioxidefromgashydrates2PhaseequilibriaforCO2-CH4mixedhydratesystem[J].ChemEngJpn,1996,29(3):4782483.[7]WarrenRice.Hydrogenproductionfrommethanehydratewithsequesteringofcarbondioxide[J].InternationalJournalofHydrogenEnergy,2006,31(14):195521963.[8]AndersonR,LiamedoM,TohidiB,etal.Experimentalme2asurementofmethaneandcarbondioxideClathratehydrateequilibriainmesoporoussilica[J].PhysChemB,2003,107:350723514.[9]AkihiroHachikubo.PhaseequilibriumandcomparisonofformationspeedsofCH4andCO2hydratebelowtheicepoint[C].ProceedingsofTheFifthInternationalConferenceonGasHydrates,Norway,2005.[10]MasakiOta,YukiAbe,MasaruWatanabe,etal.MethanerecoveryfrommethanehydrateusingpressurizedCO2[J].FluidPhaseEquilibria,2005,2282229:5532559.[11]SmithDuaneH,SeshadriKal,UchidaTsutoma,etal.Ther2modynamicsofmethane,propaneandcarbondioxidehydra2tesinporousglass[J].AmericanInstituteofChemicalEng2ineers,2004,50(7):158921598.[12]MasakiOta,KenjiMorohashi,YukiAbe,etal.ReplacementofCH4inthehydratebyuseofliquidCO2[J].EnergyConversionandManagement,2005,46:168021691.[13]McGrailBP,ZhuT,HunterRB.Anewmethodforenhan2cedproductionofgashydrateswithCO2[C].AAPGHedb2ergConference,Vancouver,2004.[14],,.CO2[J].,2006,25(5):5242527.FEASIBILITYANALYSISONREPLACEMENTOFCH4FROMHYDRATESEDIMENTBYCO2FANYan,LIUDao2ping,XIEYing2ming,ZHONGDong2liang,XIAOYang(CollegeofPowerEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China)Abstract:Gashydrateisconsideredasanimportantenergyresource,soitseffectiveexplorationandreasonableapplicationwillbecrucialtothehydrateresearch.ThispaperintroducesthefeasibilityofthereplacementofCO2forthemethanefromhydratesedimentthroughthethermodynamicandkineticdiscussions.Themethodwouldprovideawaybenefitingboththenaturalgasindustryandtheenvironmentalprotection.Keywords:Naturalgashydrate;Methane;Carbondioxide;Replacement.023Vol.18