Swing adsorption processes and systems for controlling product composition

A process for removing contaminants from a gaseous feed stream with a swing adsorption process using a cyclic swing adsorption system comprising a plurality of adsorption bed units, the process comprising:

• a) performing a first adsorption step on a first adsorption bed unit, wherein the first adsorption step comprises passing a combined gaseous feed stream through the first adsorption bed unit to remove one or more contaminants and produce a product stream, while simultaneously performing a first cooling step on a second adsorption bed unit;
• b) performing a second adsorption step on the first adsorption bed unit, wherein the second adsorption step comprises simultaneously passing the combined gaseous feed stream simultaneously through the first adsorption bed unit and the second adsorbent bed unit to remove the one or more contaminants and produce the product stream;
• c) interrupting the flow of the gaseous feed stream to the first adsorbent bed unit while retaining the flow of the combined gaseous feed stream to the second adsorbent bed unit;
• d) performing a cleaning purge step on the first adsorbent bed unit, wherein the cleaning purge step comprises passing a cleaning purge stream through the first adsorbent bed unit to remove one or more contaminants from the first adsorbent bed unit at a first temperature;
• e) interrupting the flow of the cleaning purge stream to the first adsorbent bed unit;
• f) performing a heating purge step on the first adsorbent bed unit, wherein the heating purge heating step comprises passing a heating purge stream through the first adsorbent bed unit to remove one or more contaminants from the first adsorbent bed unit at a second temperature;
• g) interrupting the flow of the heating purge stream to the first adsorbent bed unit;
• and
• h) performing a second cooling step on the first adsorbent bed unit, wherein the second cooling step comprises lessening the temperature of an adsorbent material in the first adsorbent bed unit by passing a first portion of a gaseous feed stream through the first adsorbent bed unit to produce a hot gaseous feed stream, wherein simultaneously a second portion of the gaseous feed stream bypasses the first adsorbent bed unit, and wherein during the second cooling step the hot gaseous feed stream and the second portion of the gaseous feed stream are combined to form the combined gaseous feed stream.