The vacancy solution theory is presented on the Gibbss
adsorption lsothermal equation. It considers that the
adsorbent surface is consisted of the vacancy and the
adsorption potential , and that the adsorption phase is the
solution ,which contains the vacancy ,the adsorption potential
and the adsorbed gas molecule. Following presenting the
hypothesis model of the freedom gas and the adsorption
phases equilibrium in the porous media , the two phases
equilibrium calculation model is set up in this paper by using
the Flory Hugging vacancy solution model of gas adsorption.
For an example of the dual gas mixture adsorption
equilibrium, the adsorption equilibrium simulation is
completed after regressing the parameters of the pure
component adsorption isotherm. The research result shows
that the Flory Hugging vacancy solution model can be used to
describe the gas mixture adsorption equilibrium.
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