C. Nedez et al., OPTIMIZATION OF THE TEXTURAL CHARACTERISTICS OF AN ALUMINA TO CAPTURECONTAMINANTS IN NATURAL-GAS, Langmuir, 12(16), 1996, pp. 3927-3931
Capillary condensation of water can seriously impair the performance o
f an adsorbent intended for use in removing contaminants (mercury, ars
enic, sulfur, etc.) in natural gas. Adsorption and desorption isotherm
s were used to determine how the nature and pore structure distributio
n of the adsorbent (alumina, active cabon) affect water adsorption. Th
e contribution of the different phenomena involved (chemisorption, phy
sisorption, capillary condensation) have been determined. The threshol
d of capillary condensation is reached much more rapidly on active car
bon and microporous alumina (40% relative humidity) than on a highly m
esoporous alumina (75-80% relative humidity).