ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
A one-dimensional column is considered in which a number of chemical reactions with arbitrary kinetics may take place among an arbitrary number of components. Initially, the column is in complete chemical and physical equilibrium. A localized small perturbation is introduced in the column at time t = 0. It is shown that, in general, this initial perturbation separates into a definite number of peaks which move with different velocities. Each peak broadens according to an asymptotic relation, depending on a characteristic dispersion coefficient. If n is the number of components, m the number of independent reactions, and σ the number of equations of state to be considered, there are n-m-σ peaks. These peaks do not correspond to single substances as in classical chromatography, but each peak has an eigencomposition. The velocities of the peaks are derived as functions of stoichiometry and equilibrium data. The dispersion coefficients depend, in addition, on the kinetics of the chemical reactions and on the rate of mass transfer. Thus, perturbation chromatography offers a means of determining both equilibrium and rate data. The theory is illustrated by means of two examples.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690160320
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