Equilibrium relationships for non-equilibrium chemical dependencies

Equilibrium relationships for non-equilibrium chemical dependencies

It is shown that equilibrium constants determine the time-dependent behavior of particular ratios of concentrations for any system of reversible first-order reactions. Indeed, some special ratios actually coincide with the equilibrium constant at any moment in time. This is established for batch rea...

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Veröffentlicht in:Chemical engineering science 2011, Vol.66 (1), p.111-114
Hauptverfasser: Yablonsky, G.S., Constales, D., Marin, G.B.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Batch
chemical concentration
Chemical engineering
Chemical equilibrium
Detailed equilibrium
Exact sciences and technology
Invariants
Kinetics
Reaction kinetics
Reactors
Thermodynamics process
Time invariants
Transient response
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Zusammenfassung:It is shown that equilibrium constants determine the time-dependent behavior of particular ratios of concentrations for any system of reversible first-order reactions. Indeed, some special ratios actually coincide with the equilibrium constant at any moment in time. This is established for batch reactors, and similar relations hold for steady-state plug-flow reactors, replacing astronomic time by residence time. Such relationships can be termed time invariants of chemical kinetics.
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2010.10.014