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Sarrafan, Kiana | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42380 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Bastani, Daruoosh
  7. Abstract:
  8. In liquid-liquid extraction, as in gas absorption, two phases must be brought into good contact to permit transfer of material. The presence of nanoparticles in liquid phase can enhanced the rate of gas-liquid mass transfer. The benefits of nanofluids can be used to enhance the heat and mass transfer of liquid-liquid extraction. Standard test system with low interfacial tension that recommended by EFCE: n-butanol/water/succinic acid, was used in this project. The CNTs/n-butanol that was saturated of water used as dispersed phase. Water and succinic acid used as continuous phase and solute. Since there is no chemical reaction to take place between CNTs and n-butanol, In order to obtain well dispersion solution, the surface of CNTs was modified with chemical treatment. The effect of nanoparticles on viscosity of nanofluids and the effects of volume flow rate of dispersed phase (10, 32.4 and 80 cm3/h) and volume fraction of CNTs (0.01, 0.05, 0.1 %vol.) and mass fraction of succinic acid as solute (1, 3 and 6 %wt) , and mass transfer direction (dispersed to continuous phase and vice versa) on the yield of extraction in presence of CNTs was studied. Viscosity of nanofluid decreases with increasing shear rate, which indicates Non-Newtonian behavior of nanofluids. The results show volume fraction of CNTs has an optimum value to the yield of extraction of nanofluids. the effective yield of extraction enhance up to 18% in compare with basefluid
  9. Keywords:
  10. Liquid-Liquid Extraction ; Mass Transfer ; Nanofluid ; Multi-Walled Carbon Nanotube

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