Decarbonating gas streams using zeolite adsorbents
AssigneeCeca S.A.
InventorDominique Plee
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Abstract
The invention concerns a method for decarbonating gas streams polluted by CO2, which consists in contacting them with an adsorbent consisting of an agglomerate of zeolite X with an Si/Al ratio of 1 to 1.15, highly sodium-exchanged comprising not more than 20% of inert binder, to eliminate at least the carbon dioxide.
Claims12
Process for the decarbonation of gas flows, contaminated with CO2, comprising placing in contact the gas flow to be purified, in an adsorption zone, with at least one adsorbent consisting essentially of a zeolite containing NaLSX type with an Si/Al ratio of 1 to 1.15, exchanged with sodium to a degree of greater than or equal to 98%, the degree of exchange being expressed as the ratio between the number of sodium ions and the number of aluminum atoms in a tetrahedral position, the remainder of the exchange capacity being occupied by potassium ions, agglomerated with a binder, the content of residual inert binder in the adsorbent being less than or equal to 20% by weight.
Process for purifying air contaminated with CO2 and H2O, comprising gas flow to be purified is placed in contact, in an adsorption zone, with at least one drying agent and at least with an adsorbent consisting generally of zeolite containing NaLSX type with an Si/Al ratio of 1 to 1.15, exchanged with sodium to a degree of greater than or equal to 98%, the degree of exchange being expressed as the ratio between the number of sodium ions and the number of aluminum atoms in a tetrahedral position, the remainder of the exchange capacity being occupied by potassium ions, agglomerated with a binder, the content of residual inert binder in the adsorbent being less than or equal to 20% by weight.
Dependencies are inferred from the claim text.