Apparatus and System for Swing Adsorption Processes Related Thereto

摘要

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.

主权项

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 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 purge stream comprises one of at least a portion of the methane stream, at least a portion of the nitrogen stream, and any combination thereof; 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.