The present invention relates to an intensified 5-bed and 6-bed PSA process cycles features, as well as fast rate adsorbents that enable the intensified PSA system to meet cost and performance target are identified. The proposed capital efficient H.sub.2PSA system offers opportunity to reduce PSA capital expenditure by ten percent (10%).

The invention relates to a method for regulating a unit for separating a gas stream, having P adsorbers, where P≥2, each following a PSA-type adsorption cycle with a phase time shift, the method involving the steps of operating the unit according to the nominal cycle when the required flow rate is equal to a nominal flow rate or optionally when the required flow rate is higher than the nominal flow rate, and operating the unit according to the reduced cycle when the required flow rate is lower than or equal to a predetermined flow rate, the predetermined flow rate being lower than the nominal flow rate.

The present invention relates to a temperature enhanced pressure swing adsorption (TEPSA) process for removing at least two components including a less strongly adsorbed component and a more strongly adsorbed component from a gas mixture, said process comprising using one single heater and at least two adsorber vessels, in each of which repeated cycles comprising an adsorption phase and subsequent regeneration phases.

A temperature swing adsorption process for removing a target component from a gaseous mixture containing water and at least one side component, said process comprising: (a) at least one adsorption step, providing a target component-loaded adsorbent and at least one waste stream depleted of the target component; (b) a desorption step, comprising heating of the loaded adsorbent to a desorption temperature and providing a first output stream containing the desorbed target component; (c) a conditioning step; (d) at least one target component-releasing releasing step bringing the solid adsorbent to a temperature lower than said desorption temperature and providing at least one second output stream containing an amount of the target component and containing water; (e) separating water from said second output stream(s) and (f) subjecting the so obtained water-depleted stream(s) to said adsorption step or to at least one of said adsorption steps.

A temperature swing adsorption process for removing a target component from a gaseous mixture, the process being carried out in a plurality of reactors, wherein each reactor performs: (a) adsorption of the target component providing a loaded adsorbent and a waste stream; (b) heating of the loaded adsorbent and desorption of target component, providing an output stream; (c) cooling of the adsorbent; a rinse step (a1) before the heating (b), wherein the loaded adsorbent is contacted with a rinse stream containing the target component, producing a purge stream depleted of the target component; a purge step (b1) before the cooling (c), wherein the adsorbent is contacted with the purge stream provided by another reactor while performing the rinse step (a1), thus producing an output stream containing the target component, wherein the rinse stream comprises at least a portion of the output stream provided by another reactor while performing the purge step (b1).

Provided are apparatus and systems for performing a swing adsorption process. In particular, the method and system involves swing adsorption processes and systems designed to lessen the temperature, pressure and product stream composition fluctuations in the adsorption step of a swing adsorption process, particularly involving preparation of the adsorption bed unit using feed stream cooling in conjunction with splitting the cooled feed stream to the adsorption bed units during adsorption steps while staggering the timing of back-to-back adsorption steps in the swing adsorption process. The process may be utilized for swing adsorption processes, such as rapid cycle TSA and/or rapid cycle PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

An adsorption process is provided to remove oxygen from a hydrogen stream through the use of a copper material in combination with layers of adsorbent to remove water and nitrogen from a hydrogen stream. This process is particularly useful for purification of hydrogen product gas from water electrolyzers with the hydrogen product gas having greater than 99.9 mol % purity.

An adsorption process is provided to remove oxygen from a hydrogen stream through the use of a copper material in combination with layers of adsorbent to remove water and nitrogen from a hydrogen stream. This process is particularly useful for purification of hydrogen product gas from water electrolyzers with the hydrogen product gas having greater than 99.9 mol % purity.

A method of recovering paraxylene in a pressure swing adsorption unit with varying hydrogen purge pressures. The pressure swing adsorption zone is adapted to adsorb and desorb paraxylene based on the cycling of partial pressure in the zone. A first hydrogen purge is fed concurrent to the feed. A second hydrogen purge is countercurrent to the feed.

A method of recovering paraxylene in a pressure swing adsorption unit with varying hydrogen purge pressures. The pressure swing adsorption zone is adapted to adsorb and desorb paraxylene based on the cycling of partial pressure in the zone. A first hydrogen purge is fed concurrent to the feed. A second hydrogen purge is countercurrent to the feed.