Loading...

Modeling and Simulation of Hollow Fiber Membrane Contactor in Presence of Nanoparticles

Darabi, Mohammad | 2016

664 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48804 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar; Safekordi, Ali Akbar
  7. Abstract:
  8. In this study, a comprehensive 2D mathematical model has been developed for the simulation of physical and chemical absorption of carbon dioxide in hollow fiber membrane contactors in the presence of nanoparticles. The model were developed by considering molecular diffusion in radial and axial directions as well as non-wetting conditions. Carbon dioxide absorption was simulated from a gas mixture containing carbon dioxide and air, that flows in the shell. Also, absorbent containing nanoparticles flows in tube side and counter currently. Effects of presence of nanoparticles were modeled by taking into account two prominent mechanisms proposed in the literature for mass transfer enhancement in the nanofluids, i.e., Brownian motion and Grazing effect. Model predictions were compared with experimental results reported in the literature and excellent agreement was found. The simulation results indicate that adding 0.05 (wt. %) silica nanoparticles enhances absorption rate up to 16%. Nanoparticles of carbon nanotube because of high adsorption capacity and hydrophobicity show much better Performance than that of silica nanoparticles, such that adding 0.05 (wt. %), enhances the absorption rate up to 34%. For better performance of nanoparticle in absorbent, there is an optimal concentration that this value for silica nanoparticles and CNT are 0.03 (wt. %). CNT nanoparticles in presence of monoethanolamine as chemical absorbent enhance carbon dioxide absorption up to 1% for large gas flow rates
  9. Keywords:
  10. Nanoparticles ; Modeling ; Carbon Dioxide ; Absorption ; Hollow Fiber Membrane ; Membrane Contactor

 Digital Object List

 Bookmark

No TOC