| abstract |
A macroporous adsorbent comprising pores having a pore volume (V m ) and a mean pore diameter (d m ) such that: V m ≧1 cc.g −1 and d m ≧1 μm, V m and d m being determined by mercury porosimetry; their manufacturing process using a spheronization and freeze-drying technique; and their use for separating or purifying gases, such as air, synthesis gases or hydrocarbons, especially olefins. |