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Distributed Parameter Control of Selective Catalytic Reduction (SCR) for Diesel-Powered Vehicles

  • Author / Creator
    Pakravesh, Hallas
  • The main scope of this work is to design a distributed parameter control for SCR, which is modelled by using coupled hyperbolic and parabolic partial differential equations (PDEs). This is a boundary control problem where the control objectives are to reduce the amount of NOx emissions and ammonia slip as far as possible. Two strategies are used to control SCR. The first strategy includes using the direct transcription (DT) as the open-loop control technique. The second strategy includes the design of a closed-loop control technique that uses a new numerical method developed in this work, which combines the method of characteristics and spectral decomposition, and the characteristic-based nonlinear model predictive control (CBNMPC) as the control algorithm. The results show that the designed advanced controllers are able to achieve very high control performance in terms of NOx and ammonia slip reduction.

  • Subjects / Keywords
  • Graduation date
    2013-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3Q81516X
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Chemical and Materials Engineering
  • Specialization
    • process control
  • Supervisor / co-supervisor and their department(s)
    • Robert E. Hayes (Department of Chemical and Materials Engineering)
    • J. Fraser Forbes (Department of Chemical and Materials Engineering)
  • Examining committee members and their departments
    • J. Fraser Forbes (Department of Chemical and Materials Engineering)
    • Stevan Dubljevic (Department of Chemical and Materials Engineering)
    • Robert E. Hayes (Department of Chemical and Materials Engineering)