Disclosed herein is a system including at least two adsorbent bed containing vessels in adsorption mode, where one has a high pressure PI and one has a low pressure P3, and at least one adsorbent bed containing vessel in regeneration mode. The vessel that is in regeneration mode may have a pressure P2 that is intermediate to the pressures PI and P3 of each of the vessels that are in adsorption mode. The system may be configured to introduce a gas feed stream into the high pressure (P3) vessel to generate a first product stream, followed by passing a slip stream from the first product stream, to act as a regeneration gas, into the vessel that in regeneration mode, followed by passing the regeneration gas into the low pressure (P3) vessel, without passing through a compressor, to generate a second product stream.
Disclosed herein is a system including at least two adsorbent bed containing vessels in adsorption mode, where one has a high pressure PI and one has a low pressure P3, and at least one adsorbent bed containing vessel in regeneration mode. The vessel that is in regeneration mode may have a pressure P2 that is intermediate to the pressures PI and P3 of each of the vessels that are in adsorption mode. The system may be configured to introduce a gas feed stream into the high pressure (P3) vessel to generate a first product stream, followed by passing a slip stream from the first product stream, to act as a regeneration gas, into the vessel that in regeneration mode, followed by passing the regeneration gas into the low pressure (P3) vessel, without passing through a compressor, to generate a second product stream.