Adsorption of gas mixtures of 2,2-dimethylpropane and n-butane on graphite and application of ideal adsorbed solution theory

Abstract

Results for gas mixtures of 2,2-dimethylpropane and n-butane adsorbed in the region of monolayer coverage on graphite at 303 K, show that 2,2-dimethylpropane is preferred to n-butane over the whole range of compositions, and that the adsorption of each component of the mixture is depressed by the presence of the second component.

Ideal adsorbed solution theory is examined for its ability to predict the experimental results for this system, when used in conjunction with the B.E.T. equation describing the single component adsorption. The correct adsorbent preference is predicted, but to a more marked degree.