CONCEPTUALLY NEW MODEL OF GAS CHROMATOGRAPHY
DOI:
https://doi.org/10.15421/jchemtech.v32i3.308574Keywords:
adsorption, gas chromatography, van Deemter equation, concentration waves, separation of isotopesAbstract
The paper describes a mathematical model of gas chromatography in terms of a set concentration waves passing through an adsorption column. An analytical solution is derived for the passage of concentration eigenwaves through the entire adsorption column. This makes it possible to find analytical solutions for an arbitrarily shaped concentration signal passing through the adsorption column. To do this, it is necessary to decompose the input concentration signal into a set of adsorption column eigenwaves and to obtain an analytical solution for each of the concentration eigenwaves at the exit of that column. All of the concentration eigenwave solutions are then combined. This is the solution for passing an arbitrary concentration signal through the adsorption column. This approach is suitable for any periodic adsorption process and allows for the variable concentration of components at the entrance to the adsorption layer. The wave approach to the analysis of chromatographic column processes provides an explanation for the empirical Van Deemter equations used in the practice of gas chromatography.
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