Selection of Controlled and Manipulated Variables

  • Charles F. Moore


Distillation control philosophy and practice vary greatly. Some control systems are designed using simple PID controllers whereas others are designed around sophisticated model based control algorithms. Some strategies are implemented in state-of-the-art distributed control systems (DCS), whereas others use a collection of more conventional electronic and pneumatic control devices. Distillation control strategies vary in cost and complexity, yet the performance of all strategies, large and small, are at the mercy of the sensor and valve systems to which they are connected. Poor valve choices and/or confused sensor information will render ineffective even the best of control systems.


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  1. Cantor, D. L. (1987). A detailed steady-state control analysis of an ethanol-water distillation column. M.S. thesis, The University of Tennessee.Google Scholar
  2. Deshpande, P. B., ed. (1988). Multivariable control methods. Research Triangle Park, NC: Instrument Society of America.Google Scholar
  3. Downs, J. J. (1982). The control of azeotropic distillation columns. Ph.D. thesis, The University of Tennessee.Google Scholar
  4. Forsythe, G. E. and Moler, C. B. (1967). Computer Solution of Linear Algebra. Englewood Cliffs, NJ: Prentice-Hall.Google Scholar
  5. Golub, G. H. and Reinsh, C. (1970) Singular value decomposition and least squares solutions. Numer. Math, 14, 403–420.CrossRefGoogle Scholar
  6. Roberts, J. J., Muly, E. C., Garrison, A. A, and Moore, C. F. (1991). On-line chemical composition analyzer development, phase II, Final Report DOE DE FC07–88ID 12691, Department of Energy.Google Scholar
  7. Lawson, C. L. and Hanson, R. J. (1978). Solving Least Squares Problems. Englewood Cliffs, NJ: Prentice-Hall.Google Scholar
  8. MATLAB User’s Guide (1985). The Mathworks, Inc., South Natick, MA.Google Scholar
  9. Moore, C. F. (1985). A reliable distillation control analysis procedure for use during initial column design. In 1985 Annual Meeting of the AIChE.Google Scholar
  10. Moore, C. F. (1991). A new role for engineering process control focused on improving quality. In Competing Globally Through Customer Value—The Management of Strategic Suprasystems, M. J. Stahl and G. M. Bounds, eds. New York: Quorum Books.Google Scholar
  11. Moore, C. F. (1987). Determining analyzer location and type for distillation column control. In 14th Annual Meeting of the Federation of Analytical Chemistry and Spectroscopy Societies.Google Scholar
  12. Moore, C. F., Hackney, J. E., and Canter, D. L. (1986). Selecting sensor location and type for multivariable processes. In The Shell Process Control Workshop. Boston: Butterworths.Google Scholar
  13. Roat, S. D., Downs, J. J., Vogel, E. F., and Doss, J. E. (1986). The integration of rigorous dynamic modeling and control system synthesis for distillation columns: An industrial approach. In Chemical Process Control—CPCIII, 99–138. Elsevier, Amsterdam, 1986.Google Scholar

Copyright information

© Van Nostrand Reinhold 1992

Authors and Affiliations

  • Charles F. Moore
    • 1
  1. 1.University of TennesseeUSA

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