Adsorption Separation of CH4/C3H8 and CH4/n-C4H10 Binary Gas Mixtures Using the Highly Active Microporous Adsorbent KAUSORB-VA

A comparative study was conducted of methane adsorption by CH4, propane (C3N8), and n‑butane (n-C4N10), as well as depleted mixtures of them, on the highly active microporous adsorbent KAUSORB-VA with a micropore volume of 0.68 cm3/g at temperatures of 288, 303, and 335 K in a wide range of absolute pressures up to 4 MPa. The isotherms of individual gas adsorption were calculated using the Dubinin–Radushkevich equation of the theory of volumetric filling of micropores. The adsorption of binary mixtures of CH4/C3N8 and CH4/n-C4N10 with a component content of 80/20 and 85/15 mol %, respectively, was calculated using the IAST method. The potential selectivity of the KAUSORB-VA adsorbent in adsorption gas-separation processes was assessed for their further use.