Methane adsorption on AUK microporous carbon adsorbent

Abstract

The isotherms of absolute methane adsorption on AUK microporous carbon adsorbent are measured at pressures of 1 Pa–6 MPa and temperatures of 177.65–393 K. The pattern of the isotherms remains unchanged when passing through the critical temperature of methane (T cr = 190.77 K) and, as the temperature is elevated, the isotherms are shifted toward higher pressures in an almost symbate manner. Isosteres plotted for methane adsorption on AUK microporous carbon adsorbent within the same pressure and temperature ranges are adequately approximated by straight lines, with their slopes remaining unchanged when passing into the region of supercritical temperatures under the conditions of a pronounced imperfection of the gas phase. The Henry constant is determined for the system under consideration. It is shown that the Henry constants have close magnitudes for different methane-carbon adsorbent systems.