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Separation of Olefins from Paraffins Using Nanocomposite Polymeric Membranes

Karami, Meysam | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42583 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Soltanieh, Mohammad; Goodarznia, Iraj
  7. Abstract:
  8. In this study, fabrication of polymeric nanocomposite membranes for separation of olefins from paraffins was investigated. Silver nanoparticles were prepared by Polyol chemical reduction method. At first, dense ethylcellulose and ethylcellulose-silver nanoparticles membranes were fabricated by solvent-evaporation method. Then Asymmetric EC and EC-silver nanoparticle nanocomposite membranes were fabricated by dry/wet phase inversion method as a means to improve flux rates and olefin selectivity in olefin/paraffin separations. The membranes properties and The Effects of incorporating nanoparticles in polymer matrix in low concentration on gas permeability and membranes morphology were investigated. The distribution of the silver nanoparticles in ethylcellulose was observed by high resolution scanning electron microscopy (SEM). The gas permeance fluxes of propane and propylene were measured in the asymmetric EC and EC-silver nanoparticle nanocomposite membranes. The flux rates of the gases significantly increased in asymmetric membranes in comparison with dense membranes and selectivity decreased slightly. adding silver nanoparticles to EC matrix increased propylene/propane selectivity as The ideal selectivity in a EC containing embedded silver nanoparticles membrane in a low concentration was over two times greater than in a pure EC membrane
  9. Keywords:
  10. Silver Nanoparticles ; Olefin ; Paraffins ; Nanocomposite Membrane ; Ethil Cellulose

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