Adsorbent with a high macroporosity, usable in a gas adsorption process, especially a PSA process

摘要

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 &mgr;m, 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.