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


Other title
Distributed Parameter Control
Spectral Decomposition
Selective Catalytic Reduction
Method of Characteristics
Type of item
Degree grantor
University of Alberta
Author or creator
Pakravesh, Hallas
Supervisor and department
J. Fraser Forbes (Department of Chemical and Materials Engineering)
Robert E. Hayes (Department of Chemical and Materials Engineering)
Examining committee member and department
Robert E. Hayes (Department of Chemical and Materials Engineering)
Stevan Dubljevic (Department of Chemical and Materials Engineering)
J. Fraser Forbes (Department of Chemical and Materials Engineering)
Department of Chemical and Materials Engineering
process control
Date accepted
Graduation date
Master of Science
Degree level
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.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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