Use, for gas drying and/or separation, of at least one zeolite adsorbent material in the form of agglomerates obtained from an agglomeration with at least one organic or inorganic binder, comprising at least one mesoporous A zeolite having an Si/Al ratio, measured by solid silicon 29 Nuclear Magnetic Resonance, equal to 1.00 +/- 0.05, and an external surface area, measured by nitrogen adsorption, of between 40 m 2.g -1 and 400 m 2.g -1, preferably between 60 m 2.g -1 and 200 m 2.g -1, limits included, the external surface area being the difference between the BET surface area and the micropore surface area, the micropore surface area being calculated by the t-plot method, said adsorbent having: • an external surface area, measured by nitrogen adsorption and expressed in m 2 per gram of adsorbent, between 40 m 2.g -1 and 200 m 2.g -1, and more particularly between 50 m 2.g -1 and 200 m 2.g -1, the external surface area being the difference between the BET surface area and the micropore surface area, the micropore surface area being calculated by the t-plot method, • a non-zeolite phase content such that 0 < PNZ ≤ 30%, preferably 3% ≤ PNZ ≤ 25%, more preferably 3% ≤ PNZ ≤ 20%, advantageously 5% ≤ PNZ ≤ 20%, even better still 7% ≤ PNZ ≤ 18%, measured by XRD (X-ray diffraction), by weight relative to the total weight of the adsorbent, • a mesopore volume, determined by the Barrett-Joyner-Halenda method by applying standard ISO 15901-2, of between 0.07 cm 3.g -1 to 0.18 cm 3.g -1, preferably between 0.10 cm 3.g -1 and 0.18 cm 3.g -1, and more preferably between 0.12 cm 3.g -1 and 0.18 cm 3.g -1, more preferably between 0.14 cm 3.g -1 and 0.18 cm 3.g -1 limits included, • a (Vmicro-Vmeso)/Vmicro ratio of between -0.3 and 1.0, limits not included, preferably between -0.1 and 0.9, limits not included, preferably between 0 and 0.9, limits not included, more preferably between 0.2 and 0.8, limits not included, more preferably between 0.4 and 0.8, limits not included, preferably between 0.6 and 0.8, limits not included, where Vmicro is the micropore volume measured by the Dubinin-Raduskevitch method and Vmeso is the mesopore volume determined by the Barrett-Joyner-Halenda method, • and an Si/Al atomic ratio of the adsorbent, measured by X-ray fluorescence according to standard NF EN ISO 12677, of between 1.0 and 2.0, preferably between 1.0 and 1.6, and then entirely preferably between 1.0 and 1.4, all of the measurements being carried out on the absorbent material at least 90% exchanged with calcium. • an external surface area, measured by nitrogen adsorption and expressed in m 2 per gram of adsorbent, between 40 m 2.g -1 and 200 m 2.g -1, and more particularly between 50 m 2.g -1 and 200 m 2.g -1, the external surface area being the difference between the BET surface area and the micropore surface area, the micropore surface area being calculated by the t-plot method, • a non-zeolite phase content such that 0 < PNZ ≤ 30%, preferably 3% ≤ PNZ ≤ 25%, more preferably 3% ≤ PNZ ≤ 20%, advantageously 5% ≤ PNZ ≤ 20%, even better still 7% ≤ PNZ ≤ 18%, measured by XRD (X-ray diffraction), by weight relative to the total weight of the adsorbent, • a mesopore volume, determined by the Barrett-Joyner-Halenda method by applying standard ISO 15901-2, of between 0.07 cm 3.g -1 to 0.18 cm 3.g -1, preferably between 0.10 cm 3.g -1 and 0.18 cm 3.g -1, and more preferably between 0.12 cm 3.g -1 and 0.18 cm 3.g -1, more preferably between 0.14 cm 3.g -1 and 0.18 cm 3.g -1 limits included, • a (Vmicro-Vmeso)/Vmicro ratio of between -0.3 and 1.0, limits not included, preferably between -0.1 and 0.9, limits not included, preferably between 0 and 0.9, limits not included, more preferably between 0.2 and 0.8, limits not included, more preferably between 0.4 and 0.8, limits not included, preferably between 0.6 and 0.8, limits not included, where Vmicro is the micropore volume measured by the Dubinin-Raduskevitch method and Vmeso is the mesopore volume determined by the Barrett-Joyner-Halenda method, • and an Si/Al atomic ratio of the adsorbent, measured by X-ray fluorescence according to standard NF EN ISO 12677, of between 1.0 and 2.0, preferably between 1.0 and 1.6, and then entirely preferably between 1.0 and 1.4,