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Enhancing the vanadium extraction performance using synergistic mixtures of d2ehpa and tbp in rdc column with the perforated structure; case study: evaluation probability density functions

Shakib, B ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cep.2021.108503
  3. Publisher: Elsevier B.V , 2021
  4. Abstract:
  5. The reactive extraction behavior on the mean drop size and distribution for synergistic extraction of vanadium from sulfate medium with di-(2-ethylhexyl) phosphoric acid (D2EHPA) and its mixture with tributyl phosphate (TBP) in kerosene has been interpreted in the modified rotating disc contactor column. In batch experiments, the maximum extraction efficiency was obtained in the single extraction system with 0.29 molar D2EHPA at an equilibrium pH of 2, whereas the extraction percentage was significantly increased by adding 0.3 molar TBP into the same D2EHPA concentration due to the synergistic effect. The solvent extraction process has been optimized by applying the central composition design approach in the column experiments. The influence of operational variables such as agitation rate and both phase flow rates as well as the type of used systems have been investigated on drop behavior. A unified model was provided for modified rotating disc columns. It was found from Monte Carlo simulation for uncertainty analysis that the agitation speed and type of utilized systems, namely reactive or physical systems have more profound impacts on the mean drop size. The optimum conditions were obtained at the agitation rate of 400 rpm, and phase flow rates equal to 26 L/h. © 2021
  6. Keywords:
  7. Drops ; Intelligent systems ; Mixtures ; Probability density function ; Probability distributions ; Rotating disks ; Sulfur compounds ; Uncertainty analysis ; Agitation rates ; Di(2-ethylhexyl)phosphoric acid ; Di-2-ethylhexyl phosphoric acids ; Drop size ; Drop size distribution ; Modified RDC column ; Monte Carlo's simulation ; Response-surface methodology ; Tri-butyl phosphate ; Vanadium(V) extraction ; Monte Carlo methods
  8. Source: Chemical Engineering and Processing - Process Intensification ; Volume 166 , 2021 ; 02552701 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0255270121002026