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Mediating operation of catalytic CSTR to stabilize intermediate steady state
Author(s) -
Gol'dshtein Vladimir,
Panfilov Vadim
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.690430323
Subject(s) - continuous stirred tank reactor , steady state (chemistry) , control theory (sociology) , multiplicity (mathematics) , constructive , chemistry , mathematics , control (management) , computer science , process (computing) , mathematical analysis , operating system , artificial intelligence
A novel approach for stabilizing the intermediate steady state of a continuous stirred‐tank reactor (CSTR) is proposed by using a special type of periodic forced operation, the so‐called mediating operation. The mediating operation enables new additional steady states for which one of the new intermediate steady states is stable to be produced. Thus the proposed approach employs a periodic forcing for stabilization of a selected steady state by control of a steady‐state multiplicity. The feed flow rate is considered to be a manipulated variable. Changing CSTR multiplicity is investigated for two‐step control inputs. It is shown, analytically, that under two‐step control CSTR can exhibit at most five steady states with a stable intermediate steady state. A constructive procedure is proposed for finding control parameters corresponding to maximal multiplicity, that is, for stabilizing an intermediate steady state by two‐step control.