5618

5250

كارشناسي ارشد

مهندسي شيمي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي

1389

شانزده،136ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمدرضا احساني، حميدرضا مرتهب

برزين، جلال

27/10/89

احمد محب، مرتضي صادقي

مهندسي شيمي

ID5250

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Preparation and pervaporation of poly dimethylsiloxane poly ethersulfone poration composite membranes for removal of toluene from water embranes m Sara Salehi Shahrabi s salehi@ce iut ac ir Date of Submission 1 11 2010 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran versity 84156 Degree M Sc Language Farsi guage Supervisor s Name Mohammad Reza Eh Ehsani ehsanimr@cc iut ac ir Hamid Reza Mortaheb mortaheb@ccerci ac ir ABSTRACT As the permeate flux is one of the characteristic parameters in the pervaporative processes and since the flux is e esses directly proportional to the porosity of the support membrane research on preparation of membranes with high ty n porosity and suitable strength is quite important For the purpose of improving the pervaporation performance especially for permeation flux of polymeric membranes much effort has been devoted to fabricate the well oted well structured composite membrane comprising support layer Poly ethersulfone PES has been recently considered as mprising a suitable material for support membrane due to its favorable mechanical strength resistance to acids and high mbrane sistance acids thermal and chemical resistances F Flat sheet membranes were prepared by phase inversion technique using PES ersion dissolved in dimethylacetamide DMAc with and without adding poly vinylpyrrolidone PVP360000 or yrrolidone poly ethyleneglycol PEG400 in different concentrations and different temperature of coagulation bath 23 and 40 ifferent oagulation C The effect of the composition of the casting solution and coagulation temperature on membrane morphology o and performance were investigated by porosity test scanning electron microscoby images and pure water ed y permeability By varying polymer concentration in the casting solution phase inversion PES membranes with phase sion different structures and resistances were obtained as the support layers Porosity was found to increase with decrease nd in casting solution concentration and increase in temperature of coagulation bath The membrane prepared from 15 nd wt PES with 3wt PVP at 40 C demonstrated better performance compared to the other compositions With the C ther compositions increasing concentration of PES in the casting solution the resistance of PES support layer would also increased and er could dominate the pervaporation performance of the composite membranes In this study a series of composite tudy poly dimethylsiloxane PDMS poly ethersulfone membranes were prepared to investigate the influence of vestigate support layer structure on pervaporation and separation of mixture of toluene representative of an industrially oration sentative significant family of aromatic hydrocarbon chemicals produced from industrial wastes from water The influence of ocarbon rom water temperature feed concentration membrane thickness based on wt of PDM in coating solution and turbulency embrane PDMS ng on the membrane separation efficiency permeation behaviour and performance were systematically investigated ency The permeation fluxes of both toluene and water were found to increase with increase in temperature and feed uene se temp concentration A near plateau value is obtained for water flux with further increase in concentration It may be ue n attributed to balance of plasticization and swelling effects which could contribute to water flux increase and water on ter

محمدرضا احساني، حميدرضا مرتهب

برزين، جلال

احمد محب، مرتضي صادقي