Adsorption of carbon dioxide on microporous carbon adsorbent PAU-10

Carbon dioxide adsorption on the microporous carbon adsorbent PAU-10 within the 177.8-423 K temperature and 0.1-5.13 . 10(6) Pa pressure intervals was studied. The isosteres of absolute adsorption are well approximated by str aight lines, which do not change their slope on going to temperatures highe r than the critical temperature of CO2. An increase in the differential mol ar isosteric heat of adsorption (q(st)) at 0 < a < 1 mmol g(-1) is explaine d by the influence of the endothermic effect of adsorption expansion of the adsorbent. In the region of high pressures and nonideal gas phase, q(st) i s temperature-dependent.