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Pore-scale Network Modeling of Gas-Liquid Membrane Contactors for CO2 and H2S Separation

Zolfaghari, Ashkan | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42635 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Moosavi, Abbas; Bozorgmehri, Ramin
  7. Abstract:
  8. In this study, a tree-dimensional random pore-scale network model is used to simulate the membrane contactor porous medium. Drainage and imbibition phenomena is simulated to have a better knowledge of liquid and/gas intrusion trough the membrane porous structure. A genetic algorithm is used as an optimization tool. Several variables such as the number, radius and location of pores, the coordination number, as well as the radius and length of the throats are used herein as the optimization parameters. The difference between the binary SEM images and virtual sections on the generated network in conjunction with the permeability and mean pore size data were selected as the objective function. Proposed network model is developed for various fabricated membranes. Eighteen membrane contactors were constructed using PSU/PES polymers in DMF/NMP solvent. Effect of PVP on the membrane structure is investigated. A series of 1.5 hours water steam bath followed by a 24 hours of water bath were used as the coagulation medium to remove the boundary-side condensed layer. A gaseous mixture of CH4-H2S was applied to analyze the gas sweetening process. Results show that the proposed model have provided a suitable matching to the experimental data; it then does a better prediction rather than the available classical methods
  9. Keywords:
  10. Membrane Contactor ; Pore Network Model ; Imbibition Process ; Gravity Drainage Mechanism ; Genetic Algorithm ; Mass Transfer Area

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