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Transient and resonant behavior for no reduction by CO over a Pt/Al 2 O 3 catalyst during forced composition cycling
Author(s) -
Sadhankar Ramakant R.,
Lynch David T.
Publication year - 1996
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.5450740518
Subject(s) - cycling , isothermal process , catalysis , phase (matter) , steady state (chemistry) , reduction (mathematics) , materials science , analytical chemistry (journal) , transient (computer programming) , degradation (telecommunications) , composition (language) , thermodynamics , chemistry , chemical engineering , mathematics , physics , electronic engineering , chromatography , geometry , organic chemistry , linguistics , philosophy , archaeology , computer science , history , operating system , engineering
The reduction of NO by CO over a Pt/Al 2 O 3 catalyst has been investigated using the technique of forced concentration cycling in an isothermal recycle reactor at 485 K. Time‐average conversions exhibit resonant behavior with increasing frequency. Maximum time‐average NO conversion of 78%, compared with the steady‐state conversion of 3.8%, was attained during out‐of‐phase feed concentration cycling. The effect of the phase angle between the NO and CO feed cycles has been examined. Higher conversions are obtained by decreasing the NO phase lead below 180°. The convergence to cycle‐invariance was slow for high frequency cycling.