The development of adsorption-based technologies for gas separation requires knowledge of adsorption equilibria on a specific adsorbent material. In this work, the adsorption equilibria for CO(2) and CH(4) on the beta-zeolite adsorbent were determined at (308.1, 318.1, and 328.1) K over the pressure range of (0 and 2000) kPa using a static volumetric apparatus. Experimental data were correlated by the Langmuir, Sips, and Toth equations. Despite the relative simplicity of these models, the experimental data were fit very well. The preferential adsorption capacity of CO(2) on beta-zeolite was much higher than that for CH(4), with the ideal selectivity of carbon dioxide over methane ranging from 2 to 7.