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Apparatus and system for swing adsorption processes related thereto

  • US 10,080,992 B2
  • Filed: 08/10/2016
  • Issued: 09/25/2018
  • Est. Priority Date: 09/02/2015
  • Status: Active Grant
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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