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- W2034278657 abstract "The principal objective of the experimental work reported in this paper was to employ automatic feedback control to stabilize those steady states in a nonadiabatic CSTR which were naturally unstable (that is, unstable in open-loop operation). The exothermic liquid-phase reaction between sodium thiosulfate and hydrogen peroxide in aqueous solution was used in all experiments, and the unstable states of interest were the so-called intermediate states (saddle points in the phase plane). Described here are experimental results which show successful stabilization of the unstable states. The reactor temperature and the coolant flow rates were the controlled and manipulated variables respectively. The controller used was of the conventional proportional—integral type. This paper also contains a discussion of the theoretical behavior of the controlled system as well as comparisons of the predictions of a mathematical model with experimental results. The experimental attainment of smooth stabilized reactor operation at the intermediate states was found to be relatively easy, although some care in the planning of start-up procedures was demanded in certain cases. Further, the agreement between theoretical and experimental behavior was generally good. Apparently this is the first published report of an experimental investigation into controlled operation at the unstable intermediate states of an exothermic system. Theoretical studies of the problem were first reported in the 1950's." @default.
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- W2034278657 date "1975-08-01" @default.
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- W2034278657 title "Feedback control of unstable states in a laboratory reactor" @default.
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- W2034278657 doi "https://doi.org/10.1016/0009-2509(75)80048-0" @default.
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