炭膜分离过程的机理和建模研究

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1、大连理工大学博士学位论文炭膜分离过程的机理和建模研究姓名：潘艳秋申请学位级别：博士专业：化学工程指导教师：姚平经;王世广20081205摘要盾的问题。最后，尝试将孔网络模型的研究结果应用于炭膜分离煤层气过程，设计分离方案并确定各级分离膜的孔径。关键词：炭膜；液体分离；气体分离：机理；堵塞；非平衡分子动力学；模拟；单孔狭缝模型；孔网络模型H大连理工大学博士学位论文MechanismsandModelingofCarbonMembraneSeparationAbstractCarbonmembrane，asanimportantmemberoftheinorganicmembranefam

2、ily，ispreparedbypyrolysisofvariouscarbonaceousmaterials．Itpossessesadvantagesofbetterthermalandchemicalstabilities，weal"resistanceandwell-definedstableporestructure．Therefore，carbonmembranerelevantresearcheshavegainedaworldwideinterestinliquidseparationandgasseparation．Ontheonehand，thecarbonmemb

3、ranehasbeenexperimentallydemonstratedtobefeasibleandeffectiveinseparationofliquidmixture，Ontheotherhand，thecarbonmembraneisrecognizedtohaveanattractiveprospectinseparationofgasmixturetodisplacecurrentseparationtechnologyinthiscentury．However，investigationsoncarbonmembraneseparationareinthelab—sc

4、aleandtechnologypushstagewithlessreportsofindustrialapplication．Thisisduetothelackoftheunderstandingofcarbonmembraneseparationmechanisms．Inthisdissertation，asystematicresearchoncarbonmembraneseparationwasproposedandperformedincludingmembranefabrication，separationexperiments，mechanismmodeldevelop

5、mentofliquidseparationandmoleculardynamicssimulationofgasseparation．Specifically，Thecoal．basedtubularcarbonmembraneandthecarboncompositemembraneusingtheformerasasupportwerepreparedbasedonavailableprocedures．ExperimentsWascarriedoutonmicrofiltrationofliquidmixtureusingTi02astherepresentativeofrig

6、idparticles．AmathematicmodeldescribingfluxvariationswithtimeWasdevelopedintroducingavariablecakeporosityfunctionthroughamechanismanalysis．Criticaldiameter，cakeresistance，cakeporosityandcakeheightvariationwithtimeweresuccessfullyobtained．Themodelpredictionsshowexcellentageememswitlltheexperimenta

7、ldata，whichconfirmsthepracticabilityandvalidityofthemodeldeveloped．ExperimentsWasconductedonmicrofiltrationofoilywastewaterwithoildropletastherepresentativeofdeformableparticles．BasedonthemodifiedHermia’smodel，membranefoulin