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Simulation and control of membrane reactors for catalytic reduction of dissolved oxygen from water

Karegar Ghavibazoo, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1002/cjce.23014
  3. Publisher: Wiley-Liss Inc , 2018
  4. Abstract:
  5. The catalytic reduction of dissolved oxygen (DO) from water was examined using membrane reactors and a mathematical model that considers axial dispersion, membrane permeation, and chemical reaction. The model is solved in steady state mode and the effect of various parameters on the DO removal was assessed. The results of steady state mode were employed as initial conditions for solving the model in dynamic mode. The impact of operating conditions, e.g., water flow rate, DO concentration of influent water, hydrogen flow rate, and hydrogen pressure on the performance of the DO process was studied. Results of the dynamic simulation suggested that hydrogen pressure is the best option to be used as a manipulated variable for control of effluent DO concentration. Water flow rate could be another option, however, it is determined by the requirements of the plant and consequently, cannot be used for adjustment of DO concentration. A PI controller is implemented to control the system. The closed loop responses indicate that a PI controller would perform well both in load rejection and setpoint tracking if it is tuned accurately
  6. Keywords:
  7. Dissolved oxygen removal ; Membrane reactors ; Modelling and control ; Biochemical oxygen demand ; Bioreactors ; Controllers ; Degradation ; Dissolution ; Dynamics ; Effluents ; Flow of water ; Hydrogen ; Oxygen ; Reduction ; Catalytic reduction ; Closed loop response ; Dissolved oxygen removals ; Manipulated variables ; Membrane permeation ; Membrane reactor ; Modelling and controls ; Performance degradation ; Dissolved oxygen
  8. Source: Canadian Journal of Chemical Engineering ; Volume 96, Issue 4 , 2018 , Pages 912-925 ; 00084034 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/full/10.1002/cjce.23014