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Multiple Steady States in Homogeneous Azeotropic Distillation

Bekiaris, Nikolaos and Meski, George A. and Radu, Christian M. and Morari, Manfred (1993) Multiple Steady States in Homogeneous Azeotropic Distillation. In: 1993 American Control Conference. IEEE , Piscatway, NJ, pp. 2934-2936. ISBN 0-7803-0860-3.

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In this article we study multiple steady states in ternary homogeneous azeotropic distillation. We show that in the case of infinite reflux and an infinite number of trays, multiple steady states exist when the distillate flow varies non-monotonically along the continuation path of the bifurcation diagram with the distillate flow as the bifurcation parameter. We derive a necessary and sufficient condition for the existence of these multiple steady states based on the geometry of the distillation region boundaries. We also locate in the composition triangle the feed compositions that lead to these multiple steady states. We show that the prediction of the existence of multiple steady states in the case of infinite reflux and an infinite number of trays has relevant implications for columns operating at finite reflux and with a finite number of trays. Using numerically constructed bifurcation diagrams for specific examples, we show that these multiplicities tend to vanish for small columns and/or for low reflux flows.

Item Type:Book Section
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Additional Information:© 1993 IEEE.
Record Number:CaltechAUTHORS:20170605-171718125
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Official Citation:N. Bekiaris, G. A. Meski, C. M. Radu and M. Morari, "Multiple Steady States in Homogeneous Azeotropic Distillation," 1993 American Control Conference, San Francisco, CA, USA, 1993, pp. 2931-2936.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77953
Deposited On:06 Jun 2017 18:30
Last Modified:03 Oct 2019 18:03

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