Journal of Membrane Science, ( ISI ), Volume (423), No (1), Year (2012-8) , Pages (97-106)

Title : ( Separation ofethylene/ethaneandpropylene/propanebycellulose acetate–silicananocompositemembranes )

Authors: Mahdi Naghsh , Morteza Sadeghi , Ahmad Moheb , Mahdi Pourafshari Chenar , mohammad mohagheghian ,

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The separationofolefin–paraffinmixturesisoneofthemostimportantandexpensiveprocessesin petrochemicalindustries.Inthisresearch,theperformanceofcelluloseacetate–silicananocomposite membranesintheseparationofethylene/ethaneandpropylene/propanehasbeenstudied.Silica nanoparticleswerepreparedviahydrolysisoftetraethoxysilane(TEOS).Membraneswerepreparedby the solution-castingmethod.ThepreparedmembraneswerecharacterizedusingFT-IR,SEMandTGA analyses.Puregaspermeationexperimentswereperformedbytheconstantvolume/variablepressure methodat2barfeedabsolutepressureand35 1C. Theresultsshowedthepermeabilityofethyleneand propyleneincreasedfrom0.052barrerand0.046barrerinpurecelluloseacetateto0.11and0.098 barrerinthecompositemembranecontaining30wt%silicaparticles,respectively.Thecomparisonof the selectivitiesofC2H4/C2H6 and C3H6/C3H8 indicates anincreasefrom2.16and2.55inpurecellulose acetateto4.07and6.12incompositemembranecontaining30wt%silicaparticles.Thediffusion coefficientsofpreparedhybridmembranesweredeterminedbythetimelagmethod.Thesolubility coefficientwascalculatedindirectlyfrompermeabilityanddiffusivitycoefficients.Theresultsshowed an increaseinthesolubilitycoefficientandadecreaseinthediffusioncoefficientofgaseswhile increasingthesilicamassfraction.Toinvestigatethepossibleplasticizationphenomena,theeffectof feed pressureongaspermeabilityandO2/N2 selectivity,beforeandafterexposureofmembraneswith propylene,wasstudied.Theresultsshowednoplasticizationeffectsupto8barfeedpressure.

Keywords

Olefin Paraffin Nanocomposite Membrane separation Cellulose
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@article{paperid:1030357,
author = {Mahdi Naghsh and Morteza Sadeghi and Ahmad Moheb and Pourafshari Chenar, Mahdi and Mohagheghian, Mohammad},
title = {Separation ofethylene/ethaneandpropylene/propanebycellulose acetate–silicananocompositemembranes},
journal = {Journal of Membrane Science},
year = {2012},
volume = {423},
number = {1},
month = {August},
issn = {0376-7388},
pages = {97--106},
numpages = {9},
keywords = {Olefin Paraffin Nanocomposite Membrane separation Cellulose acetate},
}

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%0 Journal Article
%T Separation ofethylene/ethaneandpropylene/propanebycellulose acetate–silicananocompositemembranes
%A Mahdi Naghsh
%A Morteza Sadeghi
%A Ahmad Moheb
%A Pourafshari Chenar, Mahdi
%A Mohagheghian, Mohammad
%J Journal of Membrane Science
%@ 0376-7388
%D 2012

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