13689

12440

كارشناسي ارشد

طراحي فرآيند

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي

۱۳۹۷

خ، ۱۲۶ص.: مصور، جدول، نمودار

احمد محب، ارجمند مهرباني

علي‌رضا خزعلي، محسن محمدي

1397/05/01

كتابنامه

مهندسي شيمي

مهندسي شيمي

ID12440

۵ 4 ۹ مقايسه روشهاي طراحي ۲۲۷ نتيجهگيري كلي و ارائه پيشنهادات فصل ششم 6 ۷ پيشنهادات 6۲۷ پيوست دادههاي تجربي و برخي از نتايج حاصل از شبيهسازي ۱۲۷ مراجع 4۷۷ چكيده انگليسي ۱۰۷ پ

Algorithm Design and Software Development for Design Calculation of Pervaporation Systems Fatemeh Vatankhah F Vatankhah@ce iut ac ir Date of Submission June 10 2018 Department of Chemical Engineering Isfahan University of Technology Isfahan Iran 84156 83111Degree M Sc Language FarsiProf A Moheb Ahmad@cc iut ac irProf A Mehrabani Zeinabad Arjomand@cc iut ac irAbstractPervaporation process has a great potential for separation of liquid mixtures especially for azeotropic ones due toits independence of vapor liquid thermodynamic equilibrium In this research trans membrane flux model and alsomodeling of the flow in the pervaporation modules have been investigated It considers the trans membrane fluxas a function of feed temperature and concentration Initially by considering four sets of different publishedexperimental data and also making comparison between the proposed model and three of the most recent models the virtues of applying the developed flux model has been detected and also it was validated According to thesimulation results of the trans membrane flux the developed model reduced relative error value by 99 9 compared to model 1 in which only the temperature dependency of the flux is assumed A reduction in relativeerrors of 35 4 for model 2 by considering both the temperature and the transferred component concentrationdependency of the flux This issue for model 3 which has used the same model as model 2 but with a differentstructure was 62 The validated developed flux model was applied for designing of pervaporation process basedon a proposed algorithm The flow model has been developed based on conservative law of mass and energy withignoring of the pressure drop This model was used for simulation of pervaporation process on separation of anazeotropic mixture of isopropanol water It was solved under isotherm and adiabatic conditions by numericalmethod Under specific feed conditions the effect of temperature on the process performance under isothermcondition have been studied and it was shown that the required membrane areas could be reduced 34 by 10 Cincreasing in the feed temperature Other hand the temperature reduction was calculated 55 C less than the inletfeed temperature under adiabatic condition Thus neglecting of this temperature drop and assuming isothermcondition results in 98 errors in evaluating of the required membrane areas in the process design To attain thepurpose of reducing the necessary membrane area an alternative of multi stage process with interstage heating wasconsidered to compensate the temperature drop Two different methods for designing of multistage pervaporationsystems have been investigated and compared By defining a specific conditions for both inlet and outlet streams a multistage pervaporation system has been designed in two different methods The first is a 10 stages system withequal membrane areas of 30 m2 per each stage The second one is an 8 stages system with equal temperature dropof 5 C per stage The required membrane areas for these structures were reduced respectively 97 64 and 97 66 compared to the single stage The solution of the model equations and the simulation of the process were performedthrough MATLAB environment Key WordsPervaporation Water Isopropanol separation Interstage heating Flow model Trans membraneflux model Simulation

احمد محب، ارجمند مهرباني

علي‌رضا خزعلي، محسن محمدي