Provided is a non-hydrocarbon gas separation device or the like capable of separating a non-hydrocarbon gas from a natural gas containing a heavy hydrocarbon. The non-hydrocarbon gas separation device is configured to separate a non-hydrocarbon gas from a natural gas. The natural gas containing a heavy hydrocarbon, the heavy hydrocarbon having 5 or more carbon atoms, is supplied to a separation module (2). The natural gas having been separated from the non-hydrocarbon gas is allowed to outflow from the separation module (2), and the non-hydrocarbon gas having been separated from the natural gas is discharged from the separation module (2). An inorganic membrane (20), which is housed in the separation module (2), and is made of an inorganic material is configured to allow the non-hydrocarbon gas contained in the natural gas to permeate therethrough to a discharge side, and to allow the natural gas having been separated from the non-hydrocarbon gas to flow to an outflow side. A heating unit (3) is configured to heat the natural gas to be supplied to the separation module (2) so that a temperature in the separation module (2) is kept at a temperature higher than a dew point temperature of the heavy hydrocarbon.

The present invention relates to a process for capturing carbon dioxide from a gas stream. The gas stream is contacted with solid adsorbent particles in an adsorption zone. The adsorption zone has at least two beds of fluidized solid adsorbent particles, and the solid adsorbent particles are flowing downwards from bed to bed. The solid adsorbent particles comprise 15 to 75 weight % of organic amine compounds. The gas stream entering the adsorption zone has a dew point which is at least 5 C. below the forward flow temperature of the coolest cooling medium in the adsorption zone. Carbon dioxide enriched solid adsorbent particles are heated, and then regenerated. The desorption zone has at least two beds of fluidized solid adsorbent particles, and the stripping gas is steam. The regenerated particles are cooled and recycled to the adsorption zone.

A method comprising the steps of: a) capturing carbon dioxide in a carbon dioxide absorption unit using a carbon dioxide absorption solution; b) feeding the carbon dioxide absorption solution comprising absorbed carbon dioxide and generated in step a) to the high-pressure regenerator of a heat exchange system comprising the high-pressure regenerator and a steam-fired reboiler; and c) supplying low-pressure steam at a pressure ranging from 3.2 to 3.5 kg/cm.sup.2 to the steam-fired reboiler for supplying heat to the high-pressure regenerator wherein, the carbon dioxide absorption solution is heated, thereby producing a steam condensate and a regenerated carbon dioxide absorption solution; characterized in that the method further comprises the step of: d) directly supplying the steam condensate produced in step c) to a de-aerator, thereby producing an aqueous solution suitable for producing steam with an oxygen content lower than 20 ppb.

Processes for solvent-based CO.sub.2 capture are described. The processes incorporate overhead vapor compression which increases the condensation temperature of water in the CO.sub.2 stripper allowing for recovery of the latent heat of the water vapor to be recovered. The processes utilize a CO.sub.2 stripping column, a compressor in the column total overhead, and a heat exchanger exchanging heat between the compressed total overhead and a portion of the rich solvent.

The present invention relates to a process for producing hydrogen and for separating carbon dioxide from synthesis gas using a physical absorption medium. The process comprises the steps where the synthesis gas and the absorption medium are cooled; carbon dioxide is removed from the cooled synthesis gas via the cooled absorption medium in a physical absorption step at elevated pressure; laden absorption medium is treated in a plurality of flash stages, wherein co-absorbed carbon monoxide, hydrogen and carbon dioxide are separately removed from the laden absorption medium; hydrogen is separated from synthesis gas freed of carbon dioxide in a physical separation step, wherein hydrogen as product gas and an offgas comprising hydrogen, carbon monoxide and carbon dioxide are obtained; product gas hydrogen and carbon dioxide are discharged from the process. The invention further relates to a plant for performing the process.

Embodiments of the present disclosure are directed to systems and methods for regenerating a sorbent material of a scrubber, configured for scrubbing a contaminant from indoor air from an enclosed space. Some embodiments include a sorbent material portion (SMP) including a sorbent material, which may be configured to be cycled between an adsorption phase for adsorbing a contaminant from indoor air, and a regeneration phase configured for releasing at least a portion of the contaminant adsorbed by the sorbent material during the adsorption phase thereof, via temperature swing adsorption, into a purging airflow.

A method and plant for capturing CO.sub.2 from a CO.sub.2 containing exhaust gas (1), where the exhaust gas is compressed (10) and thereafter cooled (13, 15, 22) before the exhaust gas is introduced into an absorber (30), where the exhaust gas is brought in counter-current flow with an aqueous CO.sub.2 absorbent solution (49), to give a lean exhaust gas (31) that is withdrawn from the absorber (30), reheated 22, 13) against incoming compressed exhaust gas, and thereafter expanded (34) and released into the atmosphere (4), where the aqueous CO.sub.2 absorbent solution is an aqueous potassium carbonate solution, and that the steam and CO.sub.2 withdrawn from the regenerator (40) is cooled in a direct contact cooler (61) by counter-current flow of cooling water (62), to generate a gaseous flow (70) of cooled CO.sub.2 and steam that is withdrawn for compression and drying of the CO.sub.2, and a liquid flow (64) of cooling water and condensed steam that is withdrawn and flashed (80), to give a cooled liquid phase (84) that is recycled as cooling water for the direct contact cooler (61) for the withdrawn CO.sub.2 and steam, and a gaseous phase (81) that is compressed (82) and thus heated, and introduced into the regenerator (40) as stripping steam (83).

The present invention relates to systems for regenerating desiccants wheels using superheated steam and to a dehumidifier comprising a system for regenerating a desiccant wheel using superheated steam. In particular the invention relates to dehumidifier systems and dehumidifiers comprising such dehumidifier systems, the dehumidifier systems each comprising a closed regeneration loop for regenerating a rotary desiccant wheel using superheated steam; and uses of excess superheated steam generated during regeneration.

The present disclosure relates to systems and methods useful for providing one or more chemical compounds in a substantially pure form. In particular, the systems and methods can be configured for separation of carbon dioxide from a process stream, such as a process stream in a hydrogen production system. As such, the present disclosure can provide systems and method for production of hydrogen and/or carbon dioxide.

A method of separating and reusing unconverted ammonia from cracked ammonia gas provided by an ammonia cracking unit is provided. The method includes introducing a cracked ammonia gas stream into a water wash column, thereby producing a clean gas stream and a water-containing effluent stream and introducing the water-containing effluent stream into a stripping column, thereby producing a cleaned wash water stream and a recovered ammonia stream. Wherein the cracked ammonia gas stream has an ammonia concentration of between 0.003 mol % and 10 mol %. Wherein the clean gas stream has an ammonia concentration of between 1 10 ppm and 2500 ppm. And wherein at least a portion of the recovered ammonia stream is used as fuel within the ammonia cracking unit.