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Optimization of reactors with catalyst decay iii‐tubular reactor with several beds of uniform temperature
Author(s) -
Crowe C. M.,
Lee S. I.
Publication year - 1971
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450490315
Subject(s) - constant (computer programming) , inlet , limit (mathematics) , catalysis , thermodynamics , mechanics , chemistry , materials science , physics , mathematics , computer science , mechanical engineering , engineering , organic chemistry , mathematical analysis , programming language
The temperature of a series of beds are chosen with time so as to maximize the overall production of an irreversible reaction, over a fixed total time. Each bed has uniform temperature and activity at any instant and the catalyst activity decays at a rate which is independent of conversion. It is shown that the temperature of each bed should finally be at the upper limit. Further, if no bed temperature is constrained, for constant inlet composition the conversion out of every bed should be held constant. Under certain conditions, it is best to shut some beds down temporarily, to save their activities for later. Numerical examples are given.