System and process for gas upgrading
A process for purifying a mixed gas stream by physisorptive and chemisorptive gas separation under ambient pressure conditions using competing physical and chemical surface reactions between the gas mixture species and an active or functionalized mesoporous or microporous material by guiding the gas mix over the media on multiple passes. The process comprises providing a feed stream and adsorbing at least one component from said feed stream to generate an intermediate product stream, providing a regeneration stream and displacing the at least one component to generate a purified exhaust stream, and admitting the intermediate product stream to reactivate the adsorbent material and further purify the intermediate product stream.
1. A steady state cyclic process for purifying a mixed component fluid stream, comprising:
receiving a feed stream comprising at least a first component and a second component, such that the feed stream flows in a first direction relative to a contactor structure and contacts a chemically active material on or incorporated in the contactor to sorb at least a portion of said second component by chemisorption to provide a first product stream depleted in said second component relative to said feed stream; and
receiving a regenerative stream comprising at least a third component, such that the regenerative stream flows in a second direction relative to the contactor structure generally opposite to said first direction and contacts and chemically interacts with the active material to sorb at least a portion of said third component by chemisorption and to displace at least a portion of said second component to provide an exhaust stream enriched in said second component relative to said first component and regenerative stream; further comprising recirculating and receiving at least some of said first product stream such that the first product stream flows in said first direction relative to the contactor structure and interacts with the active material to desorb and displace from the chemically active material at least a portion of said third component to regenerate the contactor structure for a subsequent cycle and provide a second product stream, comprising the first component of the first product stream diluted in the third component from the regenerative stream, wherein the first component of the second product stream is concentrated by cooling and condensing the third component.
2. The process according to claim 1 , wherein the first component comprises methane, the second component comprises carbon dioxide and the third component comprises water vapor.
3. The process according to claim 1 , further comprising recirculating and receiving at least some of said concentrated second product stream such that the second product stream flows in said first direction relative to the contactor structure and contacts the active material to provide a third product stream enriched in said first component relative to said second product stream.
4. The process according to claim 3 , wherein the feed stream further comprises a fourth component, at least some of which remains in the third product stream and the process further comprises recycling and receiving the third product stream such that the third product stream flows in said first direction relative to the regenerated contactor structure and contacts the active material to interact with at least a portion of said fourth component to provide a fourth product stream depleted in the fourth component.
5. The process according to claim 1 , further comprising conditioning the regenerative stream prior to being received.
6. The process according to claim 1 , wherein the contactor structure is configured within one or more chemically active contactor chambers having first and second ports which generally define said product stream flow directions relative to the contactor structure.
7. The process according to claim 1 , further comprising recovering a portion of the exhaust stream during a first time interval and recovering a different portion of said exhaust stream during a second time interval.
8. The process according to claim 7 , further comprising combining a portion of the exhaust stream recovered during the first time interval with the feed stream.