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Experimental and Numerical Investigation of Reactive Absorption in the presence of Nanofluid and Magnetic field

Kheirkhah Ravandi, Zahra | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47012 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar
  7. Abstract:
  8. The importance of gases and liquids absorption in the liquid falling film is mostly due to the wide applications of liquid falling film reactors in the chemical industries. In such a reactor the mass and heat transfer occur simultaneously, but in most cases, the importance of mass transfer is predominant. Therefore, the study of heat transfer in this kind of reactor is neglected. In order to improve the efficiency of absorption, different methods have been employed by researchers. Owing to the rapid growth of nanotechnology, nanofluids have widely been used for increasing the absorption of solution, recently. Magnetic fluids due to their unique combination, among different kinds of nanofluids, in addition of their fluidity can interact with external field. Studies have shown that the use of ferromagnetic fluids in the presence of an external magnetic field, can effectively improve the efficiency of absorption. The present study aims to investigate the effects of applying the magnetic field in the presence of magnetic nanoparticles on the carbon dioxide absorption on wet walls column in the presence of the MEA solvent. For this purpose, firstly, the validation is performed for the case in which there are no nanoparticle and magnetic field. Secondly, the effects of these parameters are investigated by applying nanoparticles as well as magnetic field. Numerical solutions of complicated governing equations by a novel algorithm by means of MATLAB software shows that the applying of magnetic nanoparticles and field intensifies the absorption and improves significantly the mass transfer coefficient. In some cases, the local dimensionless Sherwod number of gaseous phase in the upper part of the tower has increased five times higher than its normal condition
  9. Keywords:
  10. Magnetic Nanodot ; Carbon Dioxide ; Mass Transfer Coefficient ; Magnetic Fields ; Magnetic Nanofluids ; Wetted Wall ; Ferromagnetic Fluids

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