| abstract |
The present invention concerns the use, for gas separation, of at least one zeolite adsorbent material comprising at least one FAU zeolite, said adsorbent having an external surface area greater than 20 m 2 ·g −1 , a non-zeolite phase (PNZ) content such that 0<PNZ≤30%, and an Si/Al atomic ratio of between 1 and 2.5. The invention also concerns a zeolite adsorbent material having an Si/Al ratio such that 1≤Si/Al<2.5, a mesoporous volume of between 0.08 cm 3 ·g −1 and 0.25 cm 3 ·g −1 , a (Vmicro−Vmeso)/Vmicro ratio of between −0.5 and 1.0, non-inclusive, and a non-zeolite phase (PNZ) content such that 0<PNZ≤30%. |