Removal of CO 2 , N 2 , and H 2 S from gas mixtures containing same
First Claim
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1. A process for the removing a first gas component selected from the group consisting of CO2, N2, and H2S from a gas mixture containing said first gas component and a second gas component, which process comprises:
- a) conducting said gas mixture to a swing adsorption gas separation unit wherein the gas separation unit contains at least one adsorbent contactor comprised of;
i) a gas inlet end; and
ii) a gas outlet end;
wherein the gas mixture is introduced into said gas inlet end and a product stream exits the gas outlet end, which is in fluid communication with said gas inlet end, by a plurality of flow channels, wherein the adsorbent contactor is comprised of an adsorbent material comprised of an 8-ring zeolite, wherein the adsorbent material has a selectivity for said first gas component over said second gas component greater than 5, and the 8-ring zeolite has a Si to Al ratio of about 1;
1 to about 1000;
1, and wherein at least a portion of said first gas component is adsorbed into said adsorbent material, thereby resulting in said product stream which is depleted of said first gas component;
b) collecting said product stream;
c) desorbing the adsorbed gases from said adsorbent material, thereby resulting in a waste gas stream rich in said first gas component; and
d) collecting said waste gas stream;
wherein the second gas component is CH4 and the gas mixture is comprised of natural gas.
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Abstract
The removal of one or more of the gases CO2, N2 and H2S from gas mixtures containing at least one of said gases with use of an 8-ring zeolite having a Si:Al ratio from about 1:1 to about 1000:1. The preferred gas mixture is a natural gas feedstream and the preferred 8-ring zeolite is DDR.
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Citations
30 Claims
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1. A process for the removing a first gas component selected from the group consisting of CO2, N2, and H2S from a gas mixture containing said first gas component and a second gas component, which process comprises:
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a) conducting said gas mixture to a swing adsorption gas separation unit wherein the gas separation unit contains at least one adsorbent contactor comprised of; i) a gas inlet end; and ii) a gas outlet end; wherein the gas mixture is introduced into said gas inlet end and a product stream exits the gas outlet end, which is in fluid communication with said gas inlet end, by a plurality of flow channels, wherein the adsorbent contactor is comprised of an adsorbent material comprised of an 8-ring zeolite, wherein the adsorbent material has a selectivity for said first gas component over said second gas component greater than 5, and the 8-ring zeolite has a Si to Al ratio of about 1;
1 to about 1000;
1, and wherein at least a portion of said first gas component is adsorbed into said adsorbent material, thereby resulting in said product stream which is depleted of said first gas component;b) collecting said product stream; c) desorbing the adsorbed gases from said adsorbent material, thereby resulting in a waste gas stream rich in said first gas component; and d) collecting said waste gas stream; wherein the second gas component is CH4 and the gas mixture is comprised of natural gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for the removing a first gas component selected from the group consisting of CO2, N2, and H2S from a gas mixture containing said first gas component and a second gas component, which process comprises:
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a) conducting said gas mixture to a swing adsorption gas separation unit wherein the gas separation unit contains at least one adsorbent contactor comprised of; i) a gas inlet end; and ii) a gas outlet end; wherein the gas mixture is introduced into said gas inlet end and a product stream exits the gas outlet end, which is in fluid communication with said gas inlet end, by a plurality of flow channels, wherein the adsorbent contactor is comprised of an adsorbent material comprised of an 8-ring zeolite, wherein the adsorbent material has a selectivity for said first gas component over said second gas component greater than 5, and the 8-ring zeolite has a Si to Al ratio of about 1;
1 to about 1000;
1, and wherein at least a portion of said first gas component is adsorbed into said adsorbent material, thereby resulting in said product stream which is depleted of said first gas component;b) collecting said product stream; c) desorbing the adsorbed gases from said adsorbent material, thereby resulting in a waste gas stream rich in said first gas component; and d) collecting said waste gas stream; wherein the adsorbent contactor is comprised of a first adsorption zone comprising a first adsorbent material which is in fluid contact with a second adsorption zone comprising a second adsorbent material, wherein the composition of the first adsorbent material is different from the composition of a second adsorbent material. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A process for the removing a first gas component selected from the group consisting of CO2, N2, and H2S from a gas mixture containing said first gas component and a second gas component, which process comprises:
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a) conducting said gas mixture to a swing adsorption gas separation unit wherein the gas separation unit contains at least one adsorbent contactor comprised of; i) a gas inlet end; and ii) a gas outlet end; wherein the gas mixture is introduced into said gas inlet end and a product stream exits the gas outlet end, which is in fluid communication with said gas inlet end, by a plurality of flow channels, wherein the adsorbent contactor is comprised of an adsorbent material comprised of an 8-ring zeolite, wherein the adsorbent material has a selectivity for said first gas component over said second gas component greater than 5, and the 8-ring zeolite has a Si to Al ratio of about 1;
1 to about 1000;
1, and wherein at least a portion of said first gas component is adsorbed into said adsorbent material, thereby resulting in said product stream which is depleted of said first gas component;b) collecting said product stream; c) desorbing the adsorbed gases from said adsorbent material, thereby resulting in a waste gas stream rich in said first gas component; and d) collecting said waste gas stream; wherein the gas mixture is comprised of a natural gas stream containing CH4 and the adsorbent material has a selectivity for said first gas component over CH4 greater than 5;
the adsorbent contactor is a parallel channel contactor; and
wherein the adsorbent contactor is comprised of a first adsorption zone comprising a first adsorbent material which is in fluid contact with a second adsorption zone comprising a second adsorbent material, wherein the composition of the first adsorbent material is different from the composition of a second adsorbent material. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification