Premium
Catalytic oxidation of carbon monoxide under periodic operation
Author(s) -
Silveston P. L.
Publication year - 1991
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.5450690510
Subject(s) - catalysis , carbon monoxide , relaxation (psychology) , oxide , metal , resonance (particle physics) , composition (language) , gas composition , materials science , modulation (music) , chemistry , physics , thermodynamics , atomic physics , metallurgy , organic chemistry , linguistics , psychology , social psychology , philosophy , acoustics
A growing literature demonstrates resonance of the rate of CO oxidation with frequency of composition switching and that a global increase in rate under composition modulation is possible. Differences are found for the various metal catalysts used: CO oxidation is stimulated at frequencies between 0.1 and 1.0 Hz over noble metals, whereas stimulation occurs at frequencies below 0.05 Hz with oxide catalysts. Multiple resonances with an apparent harmonic relationship, “wrong‐way” response, or very slow relaxation to reproducible cycles have been observed. These differences suggest mechanisms through which rate improvements arise are not the same for all catalysts.