TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The silica:alumina ratio is 2-2.2 or 2-2.1. The residual content of potassium ions is less than 2.5 or 1% (equivalent). The low silica faujasite comprises 60-85%, and the binder comprises 15-40% of the adsorbent. The low-silica faujasite comprises less than 10 or 2 wt.% zeolite A, high silica faujasite, and other crystalline and amorphous admixtures. 80% of the faujasite is 1-3 or 1-2 mum in size. The adsorbent has a volume of macro-pores having a radius of 1000-10000 Angstrom of at least 0.4 or 0.4-0.5 cm3/g.Preferred Binder: The binder is kaolinite, bentonite, montmorillonite or attapulgite clays, silica, alumina, alumosilicates or cements.    TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Process: The low-silica faujasite is prepared by mixing sodium aluminate, sodium silicate, and sodium and potassium hydroxide, in a silicon oxide (SiO2):aluminum oxide (Al2O3) ratio of 1.9-2.2; sodium and potassium oxides (Na2O + K2O):SiO2 ratio of 3-3.4; water (H2O):(Na2O + K2O) ratio of 15.5-17.5; and Na2O:(Na2O + K2O) ratio of 0.72-0.78. The process further comprises mixing 0.6-1.5% powder of montmorillonite, based on the final weight of the reaction product, with prepared low silica faujasite. The prepared, sodium form of low-silica faujasite is ion exchanged with a solution comprising sodium chloride and sodium hydroxide. The sodium form of low silica faujasite is ion exchanged 1-3 times at 60-85 degrees C. The prepared sodium form of low-silica faujasite and binder are blended with a peptizer. They are treated with a pore-forming additive.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Additive: The pore-forming additive is synthetic and natural materials including mineral acids, polyalkeneglycols, polyacrylamides, polycarboxylates, starch, molasses or lignin.Preferred Composition: The peptizer and pore-forming additives comprise 0.5-2% of the adsorbent product, based on a total weight of the adsorbent product. EXAMPLE - 4 kg sodium/potassium low silica faujasite beads were treated at ambient temperature with 16 L of a 1.5N solution of sodium chloride. 2.3 g of the beads produced was washed with 80 L of deionized water and treated with 8 L of 3N sodium chloride solution. The product was washed with deionized water to remove the chloride ions, dried, calcined, and analyzed to have a potassium content of 2.4% (equiv.). Carbon dioxide adsorption of the adsorbent at 2, 5, 8, and 15 torr partial pressures were 32.6, 44.8, 51.3, and 61.4 cm3/g, respectively. The adsorbent had low silica faujasite exhibiting high purity (98%), which was indicative of a higher adsorption capacity at low partial pressures of carbon dioxide.