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337Vol.33No.720087JOURNALOFCHINACOALSOCIETYJuly2008:0253-9993(2008)07-0799-04,,(,310027):-,.,,,.,,,,,.:;;;:TQ53111:A:2007-09-10::(1961),,,.E-mail:zhaohong@zju1edu1cnAdsorptioncharacteristicofIndonesialigniteanddewaterexperimentZHAOHong,GUOFei,YANGJian2guo(StateKeyLaboratoryofCleanEnergyUtilization,ZhejiangUniversity,Hangzhou310027,China)Abstract:Low2temperaturenitrogenadsorptionmethod(LTNAM)wasusedtodetectthemicrosporesofIndonesialigniteandtheadsorption2desorptionisothermswereobtained.Theresultsfromcomparativeanalysisshowthatthecoalhasalargesurfacearea.Particularly,therearealotofsemi2openedmicrospores.Thesetwocharactersarethemainreasonsthatlignitehashighmoistureandishardtodewater.Themethodofaxialimpactinacertaintempera2turewasusedtoupdatethelignite.Themicrosporesdistributionofthelignitewasnotchangedapparently.Howev2er,thequantityofthemeso2poresandmacro2poreswasdecreased.Especially,thesemi2openporeswerereducedcomparatively.Sotheoverallsurfaceareawasreducedsubstantially.Thisupgradingmethodwouldhavecertainsig2nificanceondewateringthelignite.Keywords:Indonesialignite;adsorption;dewatering;porestructure,,,.,20%60%,10%25%,1%10%.,,[1],.,[1-4].,,[5].,,,200833.,.1111Autosorb,,015mm,77K,.,,,.0143nm,0143nm[6].,.012464011473mm(60100),2503h.BJH.1.1Table1Proximateandultimateanalysisofcoalsamples%MadAadVadw(Cad)w(Had)w(Nad)w(St,ad)w(Oad)1317011334319560172216611030128201282197151832915064180415511140151101201122-1.,11392m2/g,51125m2/g,3168,.1-Fig11Adsorption2desorptionisothermofcoalsamples2-,[6].-BET,,,[7].1,2,,[8].,,,Kelvin.,.,,.,0087:;,2,2..,;;[9].1(a),(b),p/p001480195,01300195.,..Kelvin[6],,,2Fig12Distributionofporesizeofsamplecoals.p/p0=01300148,,.11322,,IU2PAC(50nm;250nm;2nm),2,220nm.2.2211,,,,.,[10],.,120mm26mm,10mm20g,30010min,.,.,(818MPa)5,,6h,012464011473mm(60100),.3-Fig13Adsorption2desorptionisothermofupgradedIndonesialignite212-(3).1153m2/g,,1/3,.2,,.,.,,[11],,[10].,p/p0=0148,..10d,Mad=3161%.,10820083310dMad=5162%.3(1),,220nm.(2),,.(3).(4),,,,.:[1]ChristianBergins.Kineticsandmechanismduringmechanical/thermaldewateringoflignite[J].Fuel,2003,82:355364.[2]JohnstonBK,NicolSK,VealCJ.Residualmoisturereductionofcoarsecoalusingairpurging.1.Benchscalestudies[J].MineralsEngineering,2001,14:243255.[3]JanineHulston,GeorgeFavas,AlanLChaffee.Physico2chemicalpropertiesofLoyYanglignitedewateredbymechanicalther2malexpression[J].Fuel,2005,84:19401948.[4]KakarasE,AhladasP,SyrmopoulosS.ComputersimulationstudiesfortheintegrationofanexternaldryerintoaGreeklig2nite2firedpowerplant[J].Fuel,2002,81:583593.[5].[J].,2006(9):13.ZhangZhancun.Adsorptioncharacteristicofcoalanddistributionrulesofporeofcoal[J].SafetyinCoalMines,2006(9):13.[6],.[J].,2001,26(5):552556.ChenPing,TangXiuyi.Theresearchontheadsorptionofnitrogeninlowtemperatureandmicro2porepropertiesincoal[J].JournalofChinaCoalSociety,2001,26(5):552556.[7],,,.[J].,2004,20(4):376384.HeYusheng,LiZhong,XiHongxia,etal.Researchprogressofgas2solidadsorptionisotherms[J].IonExchangeandAd2sorption,2004,20(4):376384.[8],,,.[J].,2005,30(4):507510.LiuHui,WuShaohua,JiangXiumin,etal.Theconfigurationanalysisoftheadsorptionisothermofnitrogeninlowtempera2turewiththelignitecharproducedunderfastpyrolysis[J].JournalofChinaCoalSociety,2005,30(4):507510.[9],.[M].:,1979.[10],,.[J].,1997,14(3):4852.YuShuzheng,WuBingsheng,XieDecai.Atheoryonlignitepressingandshaping[J].JournalofHebeiInstituteofArchi2tecturalScienceandTechnology,1997,14(3):4852.[11].[J].,1994,22(3):316320.QiuJihua.Variationofsurfaceareaandporestructureofpulverizedcoalduringpyrolysis[J].JournalofFuelChemistryandTechnology,1994,22(3):316320.208