Methane Adsorption on AUK Microporous Carbon Adsorbent

A. V. Shkolin, A. A. Fomkin, and V. A. Sinitsyn

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

e-mail: shkolin@bk.ru

Received November 23, 2007

Abstract—The isotherms of absolute methane adsorption on AUK microporous carbon adsorbent are mea-
sured 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.

DOI: 10.1134/S1061933X08060173

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