A process and apparatus for producing a hydrogen-enriched product and recovering CO.sub.2 from an effluent stream from a hydrogen production process unit are described. The process utilizes a CO.sub.2 recovery system integrated with a PSA system that produces at least two product streams to recover additional hydrogen and CO.sub.2 from the tail gas stream of a hydrogen PSA unit in the hydrogen production process.

A process and apparatus for producing a hydrogen-enriched product and recovering CO.sub.2 from an effluent stream from a hydrogen production unit are described. The effluent from the hydrogen production unit, which comprises a mixture of gases comprising hydrogen, carbon dioxide, water, and at least one of methane, carbon monoxide, nitrogen, and argon, is sent to a PSA system that produces at least two product streams for separation. The PSA system that produces at least two product streams separates the gas mixture into a high-pressure hydrogen stream enriched in hydrogen, optionally a second gas stream containing the majority of the impurities, and a low-pressure tail gas stream enriched in CO.sub.2 and some impurities. The CO.sub.2-rich tail gas stream is compressed and sent to a CO.sub.2 recovery unit, where a CO.sub.2-enriched stream is recovered. The CO.sub.2-depleted overhead gas stream is recycled to the PSA system that produces at least two product streams.

A method of generating oxygen and at least one of hydrogen or ammonia includes receiving ambient air containing moisture, collecting liquid water from the ambient air, receiving, by a water electrolyzer, the collected liquid water and electricity from an electrical source, and performing an electrolysis process by the water electrolyzer to thereby generate the oxygen and the at least one of hydrogen or ammonia from the received liquid water and electricity.

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.

An adsorption system for the production of demineralized water aboard a motor vehicle comprising: a condenser, an evaporator, a first and a second adsorbent bed, each containing adsorbent material. Each adsorbent bed is selectively connectable to the condenser and/or the evaporator by pipes provided with at least one control valve. Each adsorbent bed is selectively and alternately connectable to a supply circuit of a heating source and to a supply circuit of a cooling source via supply valves. The condenser is directly and selectively connectable to the evaporator by a direct branch provided with a relative throttle valve, An inlet valve is arranged along an air inlet branch, and selectively establishes a fluid connection between the air of the environment outside the system and the adsorbent beds, so as to capture water from the external air through an adsorption phenomenon performed by the adsorbent beds and to produce water.

A gas separation unit for the separation of carbon dioxide from air is proposed for use in a cyclic adsorption/desorption process and using a loose particulate sorbent material. Sorbent material is arranged in at least two stacked layers, and each layer comprises two sheets of a flexible fabric material which is gas permeable but impermeable to the loose sorbent material. The sheets are arranged parallel defining an inlet face and an outlet face, are arranged with a distance in the range of 0.5-2.5 cm, and are enclosing a cavity in which the sorbent material is located. Said layers are arranged in the unit such that the inflow passes through the inlet face, subsequently through the particular sorbent material located in the cavity of the respective layer, subsequently to exit the layer through the outlet face to form the gas outflow.

A device for exhausting carbon dioxide includes: at least one carbon dioxide adsorber which is configured to be able to be electrically heated; and a heat radiating part of a heating device for heating an interior space. A carbon dioxide exhausting process is repeatedly performed. The carbon dioxide exhausting process includes: a first process of urging interior air to pass through the carbon dioxide adsorber and then to be introduced into an interior space; a second process of urging interior air to pass sequentially through the carbon dioxide adsorber and the heat radiating part in a state that the carbon dioxide adsorber is electrically heated and to be exhausted to an exterior space; and a third process of urging exterior air to pass sequentially through the heat radiating part and the carbon dioxide adsorber and then to be introduced into an interior space after the second process.

A rechargeable battery assembly for a vehicle has a housing and at least one metal-air rechargeable battery arranged in the housing. A filter device is arranged in the housing and conditions the inlet air of the at least one metal-air rechargeable battery such that the inlet air exhibits a predetermined air humidity.

A flow deflecting device is provided that deflects the inlet air in the housing such that the filter device can be regenerated by waste heat of the at least one metal-air rechargeable battery.

Provided is a moisture absorbing material, a dehumidifying device, and a dehumidifying method each of which makes it possible to efficiently release absorbed moisture without use of a large quantity of heat. A moisture absorbing material (22) (i) having (a) a first state in which the moisture absorbing material (22) is capable of absorbing moisture and (b) a second state in which the moisture absorbing material (22) releases the moisture absorbed in the first state and (ii) having a property of changing from the first state to the second state in response to an external stimulus and returning from the second state to the first state when the external stimulus disappears, the moisture absorbing material (22) including: first through fourth moisture absorbing bodies (22a) through (22d) which have respective different stimulus response levels and are provided in order of stimulus response level so as to be in contact with one another.

The present invention relates to a dehumidification system and method and, in particular, to a system and method for controlling the humidity of air in a process or location using a desiccant-coated fluid-air heat exchanger. The desiccant material adsorbs water at or above ambient temperatures during an adsorption cycle, and the resultant air stream is of a reduced humidity compared with the humidity of the supply air. The desiccant material may then be dried during a regeneration cycle through addition of heating fluid through the heat exchanger, driving water back into the vapour state with addition of latent energy of vaporization. The desiccant material may be cooled, during the adsorption cycle, through addition of cooling fluid through the heat exchanger to maintain the temperature within a range sufficient for water vapour to be removed from the stream of air.