Study on The Influence of Nanoparticles and Magnetic Field on The Liquid-Liquid Mass Transfer Coefficients

Vahedi, Amid | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45621 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical & Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar
  7. Abstract:
  8. Magnetite (Fe3O4) nanoparticles were synthesized and coated with Oleic Acid using the co-precipitation method. The particles were characterized using DLS, FT-IR, SEM, XRD, VSM and UV-Vis spectrophotometry analysis. The mean size of particles was 28.8 nm and the FT-IR analysis indicated that Oleic Acid was coated suitably on the nanoparticles. The vsm test indicated no hysteresis loop for the particles, defining the superparamagnetism of them. A nanofluid containing nanoparticles in 5wt% Acetic Acid in Toluene as the base fliud was prepared. The stability of this nanofluid was determined using UV-Vis spectrophotometry to be less more then 95% in the first two hours. This nanofluid is used as the dispersed phase of a single drop liquid – liquid extraction system. Also a selonoid was prepared to establish a magnetic field in the extraction column. The selonoid has an average inductance of 0.026 mH in the experiments criteria. The results of changing nanoparticles concentration, drop diameter, frequency and current of the input signal to the selonoid were obtained. The maximum enhancement of the overall mass transfer coefficient of the dispersed phase is 255% with respect to no nanoparticles in the system
  9. Keywords:
  10. Magnetic Nanodot ; Hydrodynamics ; Mass Transfer ; Magnetic Fields ; Liquid-Liquid Extraction ; Magnetic Nanofluids

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