Abstract
Oscillations, including chaotic ones, can spontaneously appear in chemical reactors or lean premixed combustors. Such behavior of the system is undesirable and should be identified at the stage of its modeling. This article analyzes the behavior of reverse-flow tubular chemical reactor with longitudinal dispersion in terms of chaotic oscillations. The purpose of using reverse flow is to increase the conversion degree. For the analysis of the reactor, among others, spectral analysis, entropy, and bifurcation analysis were used. The obtained results show the chaotic behavior of the reactor in a wide range of changes in the parameter’s values.
Highlights
The dynamics of chemical reactors were widely discussed in [1–17], where it was proved that in the steady state the concentration and temperature of the flux may oscillate in a manner that is more or less complex
The results show the complex dynamics of this type of system
The results show the complex behavior of the reactor system, ranging from periodic to chaotic behavior
Summary
The dynamics of chemical reactors were widely discussed in [1–17], where it was proved that in the steady state the concentration and temperature of the flux may oscillate in a manner that is more or less complex. The dynamic behaviour of periodically forced chemical reactors (e.g., with cyclically permuting feed and discharge positions or changing the feed flow direction) was studied in [1,4,5,7–9,12–18]. These works concern various types of reactors and their configurations. Work [7] shows the construction of maps of parameter regions with qualitatively different bifurcation diagrams for reverse-flow reactors. The authors of this work show the behavior of the analyzed system using, inter alia, Poincare maps. To define a new method to analyze the dynamics of chemical reactors with reverse flow. The papers [15,16] present new methods to analyze the dynamics of a fixed-bed reactor with periodic flow reversal. The results obtained in this study should be used in the design of this type of reactor system
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