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An experimental study of unstable states in a loop reactor
Author(s) -
Root R. B.,
Schmitz R. A.
Publication year - 1970
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690160308
Subject(s) - control theory (sociology) , adiabatic process , transient (computer programming) , loop (graph theory) , plug flow , plug flow reactor model , aqueous solution , steady state (chemistry) , controller (irrigation) , mechanics , sodium thiosulfate , hydrogen peroxide , chemistry , thermodynamics , continuous stirred tank reactor , physics , mathematics , control (management) , computer science , inorganic chemistry , organic chemistry , combinatorics , artificial intelligence , biology , agronomy , operating system
An adiabatic loop reactor was operated at naturally unstable steady states in experiments employing the reaction between sodium thiosulfate and hydrogen peroxide in aqueous solution. The unstable states, the intermediate states in a multiple state regime, were stabilized by manual manipulation of the recycle ratio. Resulting temperature data agreed well with those predicted from a plug‐flow model. Observations of the transient response to small disturbances from the intermediate states verified that they were indeed unstable as had previously been predicted theoretically. Cursory attempts to stabilize the system by means of automatic feedback control employing a three‐mode controller were unsuccessful.