TY - JOUR
T1 - Generalized parametric sensitivity
T2 - Application to a CSTR
AU - Vajda, Sandor
AU - Rabitz, Herschel
N1 - Funding Information:
Acknowledgments-H. R. acknowledges support from the Department of Energy, We also thank an anonymous referee for helpful comments.
PY - 1993/7
Y1 - 1993/7
N2 - We have recently introduced a generalized condition for thermal runaway or parametric sensitivity. The condition defines criticality as the point in the parameter space at which the system's behavior exhibits maximum sensitivity to small, unstructured perturbations. Here we use the same concept to study the steady-state behavior of a single irreversible nth-order exothermic reaction occurring in a nonadiabatic CSTR. Although the new condition provides critical parameter values in good agreement with the results of earlier methods, it reveals that the notion of parametric sensitivity in steady-state models considerably differs from the notion of parametric sensitivity in dynamical systems. First, in the steady-state CSTR criticality is related to the near-singularity of the model equation. Second, unlike in dynamical systems, there exist no well-defined boundary between subcritical and supercritical behavior. The close connections between thermal runaway and steady-state multiplicity, as well as thermal runaway and self-similarity of the sensitivity functions are discussed.
AB - We have recently introduced a generalized condition for thermal runaway or parametric sensitivity. The condition defines criticality as the point in the parameter space at which the system's behavior exhibits maximum sensitivity to small, unstructured perturbations. Here we use the same concept to study the steady-state behavior of a single irreversible nth-order exothermic reaction occurring in a nonadiabatic CSTR. Although the new condition provides critical parameter values in good agreement with the results of earlier methods, it reveals that the notion of parametric sensitivity in steady-state models considerably differs from the notion of parametric sensitivity in dynamical systems. First, in the steady-state CSTR criticality is related to the near-singularity of the model equation. Second, unlike in dynamical systems, there exist no well-defined boundary between subcritical and supercritical behavior. The close connections between thermal runaway and steady-state multiplicity, as well as thermal runaway and self-similarity of the sensitivity functions are discussed.
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U2 - 10.1016/0009-2509(93)81066-5
DO - 10.1016/0009-2509(93)81066-5
M3 - Article
AN - SCOPUS:0027628318
SN - 0009-2509
VL - 48
SP - 2453
EP - 2461
JO - Chemical Engineering Science
JF - Chemical Engineering Science
IS - 13
ER -