Apparatus and system for swing adsorption processes related thereto
First Claim
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1. A process for removing contaminants from a gaseous feed stream, the process comprising:
- a. performing one or more adsorption steps, wherein each of the one or more adsorption steps comprise passing a gaseous feed stream through an adsorbent bed unit having an adsorbent bed to separate one or more contaminants from the gaseous feed stream to form a product stream that is conducted away to a nitrogen rejection unit configured to form a methane stream and a nitrogen stream;
b. performing one or more depressurization steps, wherein the pressure within the adsorbent bed unit is reduced by a predetermined amount with each successive depressurization step;
c. performing a purge step, wherein the purge step comprises passing a first purge stream into the adsorbent bed unit, wherein the purge stream is passed in a countercurrent direction relative to the direction of the feed stream and wherein the first purge stream comprises at least a portion of the methane stream; and
d. repeating the steps a) to c) for at least one additional cycle, wherein the cycle duration is for a period greater than 1 second and less than 600 seconds.
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Abstract
Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to treat the feed stream to form a stream that complies with nitrogen rejection specifications. The process may involve using at least a portion of the nitrogen rejection process product streams as a purge for the swing adsorption process.
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Citations
22 Claims
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1. A process for removing contaminants from a gaseous feed stream, the process comprising:
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a. performing one or more adsorption steps, wherein each of the one or more adsorption steps comprise passing a gaseous feed stream through an adsorbent bed unit having an adsorbent bed to separate one or more contaminants from the gaseous feed stream to form a product stream that is conducted away to a nitrogen rejection unit configured to form a methane stream and a nitrogen stream; b. performing one or more depressurization steps, wherein the pressure within the adsorbent bed unit is reduced by a predetermined amount with each successive depressurization step; c. performing a purge step, wherein the purge step comprises passing a first purge stream into the adsorbent bed unit, wherein the purge stream is passed in a countercurrent direction relative to the direction of the feed stream and wherein the first purge stream comprises at least a portion of the methane stream; and d. repeating the steps a) to c) for at least one additional cycle, wherein the cycle duration is for a period greater than 1 second and less than 600 seconds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for removing contaminants from a gaseous feed stream, the system comprising:
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an adsorbent bed unit configured to separate contaminants from a gaseous feed stream and to output a product stream, wherein the adsorbent bed unit comprises an adsorbent bed and the adsorbent bed unit is configured to perform a rapid cycle swing adsorption process; a nitrogen rejection unit in fluid communication with the adsorbent bed unit and configured to receive the product stream and separate the product stream into a methane stream and a nitrogen stream; and wherein the adsorbent bed unit is configured to pass a first purge stream through the adsorbent bed, wherein the first purge stream is passed in a countercurrent direction relative to the direction of the feed stream and wherein the purge stream comprises at least a portion of the methane stream. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification