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Design procedure for stable operations of first‐order reaction systems in a CSTR
Author(s) -
Heiszwolf Johan J.,
Fortuin Jan M. H.
Publication year - 1997
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.690430419
Subject(s) - continuous stirred tank reactor , linearization , thermodynamics , coolant , chemistry , heat transfer , set point , mass transfer , enthalpy , control theory (sociology) , mechanics , engineering , physics , nonlinear system , computer science , control engineering , control (management) , quantum mechanics , artificial intelligence
An application‐oriented design procedure is presented for unique and point‐stable operations of first‐order reaction systems in a continuous stirred‐tank reactor (CSTR). For a given set of values of kinetic constants, reaction enthalpy, feed conditions, residence time, and relevant physical properties, two boundary values of the heat‐transfer capacity (St 1 , St 3 ) and two of the modified coolant temperature (θ mc, 2 , θ mc, 3 ) are analytically derived after a linearization of the unsteady mass and energy balances. With these boundary values, two separate design conditions are formulated; one for the heat‐transfer capacity (HTC, characterized by St) and one for the modified coolant temperature (MCT, characterized by θ mc ). Each of these conditions is sufficient to guarantee unique and point‐stable steady‐state operations for a range of St or θ mc values. Predicted behaviors of reacting systems are compared with experimental results obtained from five different systems reacting in four bench‐scale and two commercial reactors.