A carbon capture system can include a plurality of CO.sub.2 thermal swing adsorption (TSA) beds. The plurality of CO.sub.2 TSA beds can include at least a first TSA bed, a second TSA bed, and a third TSA bed configured to capture CO.sub.2 within a capture temperature range and to regenerate the captured CO.sub.2 at a regeneration temperature range above the capture temperature range. The carbon capture system can include a plurality of valves and associated flow paths configured to allow switching operational modes of each of the first, second, and third TSA beds.

Aspects of the present invention relate to a gas treatment apparatus (1) for treating a process gas. The gas treatment apparatus (1) includes a primary treatment unit (2) and a secondary treatment unit (3), the primary and secondary treatment units (2, 3) being configured to treat the process gas. The primary treatment unit (2) includes a primary process gas inlet (10) for receiving the process gas, a first and a second primary adsorber (12, 13) for treating the process gas, and at least one primary process gas outlet for discharging the treated process gas from the first and the second primary adsorbers (12, 13). The secondary treatment unit (3) includes a secondary process gas inlet (30) for receiving the process gas, at least one secondary adsorber (32, 33) for treating the process gas, and at least one secondary process gas outlet (31) for discharging the treated process gas from the at least one secondary adsorber (32, 33) to the primary treatment unit (2). The primary treatment unit (2) is selectively configurable in a first operating mode and a second operating mode. When operating in the first operating mode, the primary process gas inlet (10) is connected to the first primary adsorber (12) to supply the process gas to the first primary adsorber (12) for treatment; and the second primary adsorber (13) is connected to the at least one secondary process gas outlet (31) to receive treated process gas from the secondary treatment unit (3) for regenerating the second primary adsorber (13). When operating in the second operating mode, the primary process gas inlet (10) is connected to the second primary adsorber (13) to supply the process gas to the second primary adsorber (13) for treatment; and the first primary adsorber (12) is connected to the at least one secondary process gas outlet (31) to receive treated process gas from the secondary treatment unit (3) for regenerating the first primary adsorber (12). Aspects of the present invention also relate to a method of controlling a gas treatment apparatus (1) to treat a process gas; and a liquid air energy storage plant.

In some examples, a system for water harvesting and carbon dioxide removal from air is disclosed. The system can include a sorption-based atmospheric water harvesting module that can include a first water capture unit and a second water capture unit coupled in series to an atmospheric air intake. The first water capture unit utilizes a first sorbent material that is different than a second sorbent material utilized by the second water capture unit. The system can further include a direct air capture module that includes a carbon dioxide capture unit. The direct capture module can be in fluid communication with, and downstream from, the sorption-based atmospheric water harvesting module. The carbon dioxide capture unit can be configured to remove carbon dioxide from air dried by the sorption-based atmospheric water harvesting module.

Device for adsorbing a gas from a gas mixture to be treated, having an inlet for gas to be treated and an outlet for treated gas, including at least two vessels filled with a regenerable adsorbent and an adjustable valve system connecting the inlet and outlet to the vessels, whereby the adjustable valve system is such that at least one vessel will treat compressed gas while the other vessel is regenerated, whereby by adjusting the valve system the vessels each in turn treat compressed gas sequentially, and the adjustable valve system is assembled in a single valve block.

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.

The present disclosure provides a method for a mobile pressure swing adsorption oxygen production device, comprising a first PSA section, a second PSA section and a third PSA section which are operated in series; the first PSA section adsorbs oxygen in raw air by a velocity-selective adsorbent; the second PSA section adsorbs nitrogen etc. in desorption gas of the first PSA section by a nitrogen balance-selective adsorbent; the third PSA section removes nitrogen from oxygen-rich gas flowing out of the second PSA section; the first PSA section sequentially undergoes at least adsorption A and vacuumizing VC in one cycle; the second PSA section sequentially undergoes at least adsorption A, pressure-equalizing drop ED, backward discharge BD and pressure-equalizing rise ER; and the third PSA section sequentially undergoes at least adsorption A, pressure-equalizing drop ED, backward discharge BD and pressure-equalizing rise ER.

An oxygen concentrator device comprising at least 2 separation vessels with a feed end and a product end, and a set of manifolds comprising at least one feed manifold attached to the feed end of the separation vessels and at least one equalization manifold attached to the product end of the separation vessels. The feed manifold comprises compression ports and valving; vacuum ports and valving; and, an upstream headspace equaling 2-6% of the total sorbent volume in the combined sieve beds. The equalization manifold comprises equalization ports and valving; and, a downstream headspace equaling 2-6% of the total sorbent volume in the combined sieve beds. The ratio of compression, vacuum, and equalization Cv to total sorbent volume is

[00001]$0.0005-0.005\left(\frac{\mathrm{gal}}{\min }\right)\left(\frac{1}{L_S}\right).$

Also, a method for concentrating oxygen, providing the set of manifolds described above and operating the oxygen concentrator without separately purging the sieve bed with an unused gas.

The present invention provides a system for the capture and purification CO.sub.2 and a purification unit for said system, wherein said purification unit comprises: a first filter having a first container and a first filler material; a second filter having a second container and a second filler material, downstream of said first filter; a third filter having a third container and a third filler material, downstream of said second filter, said third filter having, additionally, a heating element thermally coupled to said third filler material; and control means of said heating element; wherein said first filler material is silica; wherein said second filler material is zeolite; and wherein said third filler material is a metal-organic framework modified with activated carbon.