Separation of carbon dioxide and hydrocarbons
First Claim
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1. A method of separating carbon dioxide from a gas mixture by a cyclic adsorption process comprising the steps:
- (a) passing said gas mixture through at least one adsorption zone containing an adsorbent selected from the group consisting of type A zeolite having as its exchangeable cations, about 40 to about 90% sodium ions, about 10 to about 50% potassium ions and about 0 to about 10% other ions selected from the group consisting of Group IA ions, Group IB ions, Group IIA ions, Group IIIA ions, Group IIIB ions, lanthanide series ions and mixtures of these;
thereby adsorbing at least part of the carbon dioxide from said gas mixture and producing a carbon dioxide-depleted gas; and
(b) regenerating said adsorbent, thereby producing a carbon dioxide-enriched gas.
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Abstract
Carbon dioxide is separated from gaseous hydrocarbons by a cyclic adsorption process using at a temperature in the range of about -50 to about 200° C., wherein the adsorption step of the process is conducted by passing the gas mixture through an adsorption zone containing carbon molecular sieve or type A zeolite whose exchangeable cations are made up of about 50 to about 90% sodium ions and about 10 to about 50 percent potassium ions.
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28 Claims
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1. A method of separating carbon dioxide from a gas mixture by a cyclic adsorption process comprising the steps:
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(a) passing said gas mixture through at least one adsorption zone containing an adsorbent selected from the group consisting of type A zeolite having as its exchangeable cations, about 40 to about 90% sodium ions, about 10 to about 50% potassium ions and about 0 to about 10% other ions selected from the group consisting of Group IA ions, Group IB ions, Group IIA ions, Group IIIA ions, Group IIIB ions, lanthanide series ions and mixtures of these;
thereby adsorbing at least part of the carbon dioxide from said gas mixture and producing a carbon dioxide-depleted gas; and(b) regenerating said adsorbent, thereby producing a carbon dioxide-enriched gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification