甲醇水溶液模拟

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1、请帮我做一下aspen的混合物的凝固点的模拟。谢谢了！1、目的甲醇水溶液的凝固点比水低。因此。一定比率的甲醇水溶液可以防冻。甲醇质量分数越大，凝固点越低。但是加过多甲醇有时候会造成污染或浪费。我们生产主任是通过把不同比率的溶液放入冰箱中实验。其实网上也能查出结果来。但我想学会用aspen软件算出不同浓度的甲醇水溶液的凝固点。2、参考我从网上找了一篇甲醇水溶液的模拟说明。全英文的。介绍整个模拟过程。没有图。全文如下： TFREEZE1.INP  ExampleofusingTFREEZtoestimatefreezepoints  TheASPENPLUSTFREEZpropertycanbeu

2、sedasanestimateofthe freeze-outtemperatureforacomponentineitheraliquidorvapor mixture.ThevalueofTFREEZisthetemperaturewhereacomponent justbeginstofreeze-outatagivenconcentrationandpressure. Freeze-outtemperaturescanbedeterminedforvaporssuchasCO2,or forliquidssuchaswater.Inthisexample,thewaterfreezeo

3、ut temperatureforwaterandmethanolsolutionswillbecalculated. SeetheTFREEZE2exampleforanillustrationonpredicting gas-solidfreezeouttemperatures.  Thefreeze-outtemperatureisdeterminedfromfugacity.To accuratelyestimateliquidfreezingpointdepressions,aliquid fugacitymodelsuchasNRTLorELECNRTLmustbeusedtoes

4、timatethe decreaseinchemicalpotentialduetothepresenceofother components.Thesecomponentscanbemolecularorionic.Methanol forexampleinwatersolutionsortheNa+andCl-ionswhensodium chlorideisdissolvedinwater.Theprecipitatedsolidisassumedto beasinglepurecomponentmakingthechemicalpotentialofthesolid constantw

5、ithrespecttotheconcentrationofothercomponents.It isalsoimportantthattheparametersforthesemodelsbeaccurate overthetemperaturerangeofinterest.  Therecommendedphysicalpropertyrouteforsolidfugacity(PHIS)is PHIS06whichusesthePHS0LIQmodelbydefault.Thismodel calculatesthesolidfugacityfromtheliquidfugacitya

6、ndthesolid heatoffusion.Thesolidheatoffusioniscalculatedata referencetemperaturethatisspecifiedintheProp-Setusedto declaretheTFREEZproperty.Forliquidsystems,theuseofthesame liquidfugacitymodelasusedinthemainphysicalpropertyoption setisrequired.IftheNRTLphysicalpropertyoptionsetisused withthedefaultr

7、outeforPHIL,thisroute(PHIL00)shouldbe specifiedforPHILwithinthePHIS06route.  Inthisexample,thefreeze-outtemperaturesofwaterarecalculated formethanolandwatersolutionsusingaTGSProp-Table.Theresults calc