超臨界反溶劑過程傳質(zhì)數(shù)值模擬及實驗研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文超臨界反溶劑過程傳質(zhì)數(shù)值模擬及實驗研究姓名：韓偉申請學(xué)位級別：碩士專業(yè)：化工過程機械指導(dǎo)教師：李志義張曉冬20050601超臨界反溶劑過程傳質(zhì)數(shù)值模擬及實驗研究AbstractThesupercriticalantisolvent(SAS)processhasbeenproposedrecentlyaSanewmethodofmicroparticleformationwhichcanbeappliedinche

2、micalengineeringbioengineering，medicaltreatme／atandpharmacyetcBecauseofthelackofthetheoreticalinvestigationandthelimitationoftheexperiments，acompleteunderstandingoftheSASprocesshasnotgotandthecoEffnonconclusionshowtheimp

3、ortantprocessparameterseffectonparticlecharacteristiCscan’tbedro啪ThemasstransferbehaviorofthedropletsisthoughttobeakeyfactoreffectingontheparticlemorphologyThestudyofmasstransferofthedropletsishelpfultofindouttheeffectof

4、theopermionconditionsonparticlecharacteristics，andgiveanapproachofthechoicefortheoperationconditionsfortheSASprocessAmathematicalmodelofmasstransferbetweenanorganicsolventdropletanditsantisolventenvkonmentispresentedThro

5、ughthenumericalmodelingofmasstransferatthedifferentconditionstheevolutionofthedropletinthewholeprocessisanalyzedAccordingtothehsultsofmasstransfermodelhigforacetoneC02，etllanolC02，andtoluene—C02，thedropletswellingoccursw

6、henthesolventisdenserthanantisolvent，whileshrinkingoccursatveryhi【ghpressuresforwhichtheanfisolventisthedensercomponentFurthermore，masslransferisfasterwhenthesolventandantisolventaremiscible(atthemixturesupercriticalcond

7、itions)ascomparedtothesubcriticalconditionsforwhichtwophasesexistTheresultssuggestthatthesolvent—antisolventcriticallocusandequaldensitylocuscanbeusefulguidesforselectingSASoperatingconditionsTheSASprocessexperimentisuse

8、dtoproducemicro—particlesofquercetinTheeffectsoftheSASprocessparametersonpaaiclemorphologyarestudiedThenumericalmodelingofmasstransferofthedropletsfortheseprocessesisgivenandtheevolutionsofthedropletlifetimeatdifferentco

9、nditionsarediscussedThemodelresultisinagreementwiththeexperimentaldataSothebestoperationconditionsfortheSASprocesscanbechoosenbythemodelingofmasstransferKeyWords：Supercriticalantisoiventprocess；masstransfer；numericalsimu