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Dynamic and steady‐state features of a cooled countercurrent flow reactor
Author(s) -
Garg Rohit,
Luss Dan,
Khinast Johannes G.
Publication year - 2000
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.690461014
Subject(s) - countercurrent exchange , steady state (chemistry) , mechanics , flow (mathematics) , nuclear engineering , thermodynamics , materials science , chemistry , engineering , physics
A countercurrent flow reactor (CFR) is an autothermal reactor, in which the reactants flow countercurrently at equal velocities and flow rates through two compartments, with negligible heat‐transfer resistance between the two sections. Two‐reactor configurations can be used: a “regular” one, in which the two components are fed by two separate feeds; a “folded” configuration, in which a single feed flows first through one compartment and then reverses its direction and flows countercurrently in the second. Temperature and concentration profiles in the regular CFR configuration usually have mirror symmetry around its center. Under cooling, however, asymmetric steady‐state profiles may form. The interaction between the heat removed by the effluents and by cooling through the wall may generate complex periodic or even chaotic states. The temperature and concentration profiles in a folded CFR are the same as those attained in a regular CFR, which are symmetric around the reactor center. The imposed symmetry causes the steady‐state and dynamic features of the folded CFR to be less complicated than those of the regular CFR and is less likely to cause operational problems. Boundaries of parameter regions with qualitatively different features for both CFR configurations were constructed by the method of Khinast et al. (1998a). The analysis of the CFR enhances the understanding of similar dynamics observed in a reverse‐flow reactor.