Abstract: This disclosure relates to techniques for producing liquid water from ambient air. In certain embodiments, a system includes a regeneration fluid pathway configured to receive a regeneration fluid and a thermal unit configured to heat the regeneration fluid. The system can further include a continuous desiccant unit that comprises an adsorption zone and a desorption zone, as well as a batch desiccant unit that includes a regeneration inlet and a batch desiccant housing. The batch desiccant housing can include a batch desiccant inlet configured to input the ambient air, a batch desiccant outlet configured to output a batch output fluid, and a batch desiccant material. A condenser unit can be configured to produce liquid water from the regeneration fluid, and the system can maximize a water production rate of the condenser unit based on an amount of heat carried by the regeneration fluid.

Abstract: Recovering helium from a gaseous stream includes contacting an acid gas removal membrane with a gaseous stream to yield a permeate stream and a residual stream, removing a majority of the acid gas from the residual stream to yield a first acid gas stream and a helium depleted clean gas stream, removing a majority of the acid gas from the permeate stream to yield a second acid gas stream and a helium rich stream, and removing helium from the helium rich stream to yield a helium product stream and a helium depleted stream. A helium removal system for removing helium from a gaseous stream including hydrocarbon gas, acid gas, and helium includes a first processing zone including a first acid gas removal unit, a second processing zone including a second acid gas removal unit, a third processing zone, and a helium purification unit.

Abstract: A method for revamping a CO2 removal section for removing carbon dioxide from a hydrogen-containing synthesis gas, wherein the CO2 removal section comprises an absorption section (2) wherein carbon dioxide is transferred to an absorbing solution and a stripping tower (3) for regeneration of the CO2-loaded solution, said stripping tower comprising an upper zone (4) where a first gaseous CO2 stream (10) and a partially regenerated semi-lean solution (11) are produced, and a lower zone (5) acting as a stripping zone where a second gaseous CO2 stream (12) and a lean regenerated solution are produced, the second CO2 stream (12) being a substantially pure stream containing less hydrogen and impurities than the first CO2 stream, and wherein the method of revamping provides the installation of sealing means (16) inside the stripping tower (3), arranged to isolate said second gaseous CO2 stream (12) from the first stream (10), so that the second stream (12) can be exported separately.

Abstract: An apparatus to change liquid light aromatic hydrocarbon into gaseity includes a gas storage barrel, two gas generation barrels and two gas connection pipes connected between the gas storage barrel and the respective gas generation barrels to form a “?” shape. Each gas generation barrel includes a light aromatic hydrocarbon filling pipe, an air supply pipe, an air intake pipe, an aeration pipe, and a heating member. A liquid communicating pipe is connected between the two gas generation barrels. The apparatus of the present invention is to mix and gasify liquid fuel, such as ether or alkanes, and air as combustion gas. During heating, the fuel can be resupplied to stable the quality of the output gas.

Abstract: The invention recovers highly pure hydrogen from the exhaust purge gas and reuses it as a hydrogen source in other production steps contributing to greatly reducing the disposal cost and the cost of producing polysilicon. The hydrogen chloride contained in the exhaust gas discharged from the step of depositing polysilicon by using trichlorosilane, is adsorbed by active carbon. The active carbon layer is then purged with the hydrogen gas, and the adsorbed hydrogen chloride is desorbed. Next, the exhaust purge gas is brought into contact with a hydrogen chloride-absorbing solution such as an aqueous solution of sodium hydroxide to remove the hydrogen chloride from the exhaust purge gas and to separate and recover the highly pure hydrogen gas. The recovered hydrogen gas is compressed and is fed as a hydrogen source to other steps of producing, for example, fumed silica.

Abstract: Carbon dioxide-containing gas such as flue gas and a carbon dioxide-rich stream are compressed and the combined streams are then treated to desorb moisture onto adsorbent beds and then subjected to subambient-temperature processing to produce a carbon dioxide product stream and a vent stream. The vent stream is treated to produce a carbon dioxide-depleted stream which can be used to desorb moisture from the beds, and a carbon dioxide-rich stream which is combined with the carbon dioxide-containing gas.

Abstract: Inhalation of low levels of nitric oxide can rapidly and safely decrease pulmonary hypertension in mammals. A nitric oxide delivery system that converts nitrogen dioxide to nitric oxide employs a surface-active material, such as silica gel, coated with an aqueous solution of antioxidant, such as ascorbic acid.

Abstract: [Problems] Attempts have already been made to effectively utilize the by-produced hydrogen chloride in the exhaust gas discharged from the step of producing polysilicon. Hydrogen in the exhaust gas, too, has been partly utilized without using but discarding, however, the purge hydrogen that is used for desorbing the hydrogen chloride adsorbed in the above step. The invention recovers highly pure hydrogen from the exhaust purge gas and reuses it as a hydrogen source in other production steps contributing to greatly reducing the disposal cost and the cost of producing polysilicon. [Means for Solution] The hydrogen chloride contained in the exhaust gas discharged from the step of depositing polysilicon by using trichlorosilane, is adsorbed by active carbon. The active carbon layer is then purged with the hydrogen gas, and the adsorbed hydrogen chloride is desorbed.

Abstract: A concentrated carbon dioxide stream is produced during a hydrogen pressure swing adsorption unit cycle by fractionating the carbon dioxide removed from the adsorbent in the adsorption beds during the regeneration of the adsorption beds. Thereby providing a cost efficient process for producing merchant carbon dioxide.

Abstract: The invention provides a process for removal of hydrogen sulphide, iron pentacarbonyl and nickel tetracarbonyl from a feed synthesis gas stream, the process comprising the steps of: (a) removal of hydrogen sulphide and of iron pentacarbonyl by contacting the feed synthesis gas stream with an absorbing liquid comprising water, physical solvent and an amine, to obtain a synthesis gas stream depleted of hydrogen sulphide and depleted of iron pentacarbonyl; (b) adsorption of nickel tetracarbonyl by contacting the synthesis gas stream depleted of hydrogen sulphide and depleted of iron pentacarbonyl with solid adsorbent comprising activated carbon to obtain solid adsorbent enriched in nickel tetracarbonyl and a purified synthesis gas stream.

Abstract: The present invention relates to various processes for recovering high purity gaseous hydrogen and high purity gaseous carbon dioxide from the gas stream produced using steam hydrocarbon reforming, especially steam methane reforming, utilizing a H2 pressure swing adsorption unit followed by either a CO2 vacuum swing adsorption unit or a CO2 vacuum swing adsorption unit in combination with an additional CO2 pressure swing adsorption unit. By using an uncoupled H2 PSA and CO2 VSA unit it is possible to produce high purity H2 and high purity CO2. The present invention further relates to a process for optimizing the recovery of CO2 from waste gas streams produced during the hydrogen purification step of a steam hydrocarbon reforming/H2 pressure swing adsorption unit utilizing either a CO2 vacuum swing adsorption unit or a CO2 vacuum swing adsorption unit in combination with a CO2 pressure swing adsorption unit.

Abstract: A process for the recovery of CO2 from a flue gas is provided. This process includes compressing a flue gas to a first pressure, cooling the flue gas to a first temperature, and drying flue gas by a drying means. This process includes adsorbing CO2 in a first adsorbent bed, wherein the first adsorbent bed is isothermally maintained by a first cooling means. The process includes pressurizing the first adsorbent bed to a second pressure with CO2 at a second temperature, wherein the second pressure is greater than the initial pressure, wherein the second temperature is greater than the initial temperature. The process includes heating the first adsorbent bed to a third temperature with a first heating means, thereby increasing the first adsorbent bed to a third pressure, wherein the third temperature is greater than the second temperature, wherein the third pressure is greater than the second pressure, thereby releasing a first portion of adsorbed CO2.

Abstract: The present invention relates to a method of producing hydrogen of very high purity from a feed predominantly containing said hydrogen and a minor part of impurities mainly consisting of carbon dioxide, carbon monoxide, methane and heavier hydrocarbons. The purification method by hydrogen adsorption using a desorption stage at a lower pressure than the pressure of the feed, such as a PSA method for example, allows to produce the desorption stream and notably to recover the carbon dioxide under pressure and high-purity hydrogen, with a high yield. These performances are obtained by combining the successive stages of the method according to the invention with the use of a new family of adsorbent whose dynamic capacity at a high desorption pressure is greater than that of conventional adsorbents.

Abstract: A method of purifying a gaseous mixture rich in hydrogen and in carbon monoxide, commonly termed an H2/CO mixture or syngas, by adsorption prior to treating it cryogenically with a view to producing a CO-rich fraction, and/or one or more H2/CO mixtures of determined content, such as a mixture of 50 mol % H2/50 mol % CO and generally a hydrogen-rich fraction is provided.

Abstract: The invention provides a process for removal of hydrogen sulphide, iron pentacarbonyl and nickel tetracarbonyl from a feed synthesis gas stream, the process comprising the steps of: (a) removal of hydrogen sulphide and of iron pentacarbonyl by contacting the feed synthesis gas stream with an absorbing liquid comprising water, physical solvent and an amine, to obtain a synthesis gas stream depleted of hydrogen sulphide and depleted of iron pentacarbonyl; (b) adsorption of nickel tetracarbonyl by contacting the synthesis gas stream depleted of hydrogen sulphide and depleted of iron pentacarbonyl with solid adsorbent comprising activated carbon to obtain solid adsorbent enriched in nickel tetracarbonyl and a purified synthesis gas stream.

Abstract: The mercaptan-laden natural gas is contacted with a mercaptan-adsorbing sieve T1. The mercaptan-rich gaseous effluent obtained upon regeneration of sieve T2 is then contacted with an olefin-containing liquid feed in the presence of an acid catalyst. Under suitable conditions, the mercaptans are absorbed in the liquid feed and they react with the olefins so as to form solvent-soluble sulfides. A solvent regeneration stage allows the capture agent to be recycled.

Abstract: The present invention relates to preparation of imaging compositions containing Rubidium-81. In addition, the present invention relates to uses of Rubidium-81-containing compositions in diagnostic imaging such as, for example, myocardial imaging.

Abstract: The present disclosure provides a method and apparatus for extracting carbon dioxide (CO2) from a fluid stream and for delivering that extracted CO2 to controlled environments for utilization by a secondary process. Various extraction and delivery methods are disclosed specific to certain secondary uses, included the attraction of CO2-sensitive insects, the ripening and preservation of produce, and the neutralization of brine.

Abstract: Adsorption process for recovering ozone from a feed gas mixture containing at least ozone and oxygen comprising (a) introducing the feed gas mixture into a first end of an adsorber vessel containing a zeolite adsorbent and selectively adsorbing ozone on the adsorbent; (b) withdrawing from a second end of the vessel a stream of oxygen essentially free of ozone; (c) terminating the flow of the feed gas mixture, introducing a purge gas into the second end of the vessel, and withdrawing from the first end of the vessel an outlet gas mixture containing at least purge gas and desorbed ozone; and (d) introducing an additional component into the feed gas mixture and/or the purge gas and adsorbing the additional component on the zeolite adsorbent. The additional component when adsorbed reduces the decomposition of ozone that would occur in the absence of the additional component adsorbed on the zeolite adsorbent.

Abstract: A filter cartridge for recovering halogenated hydrocarbons (HKW), such as those occurring in inhalation anesthetics in the medical field, contains a first gas inlet; a container which contains a filter insert; wherein the container is connected over a connection with a cover and with a gas release; wherein the container is united via two sealing rings and a filter plate with the cover; wherein the filter insert contains a zeolite; wherein the filter insert has openings; wherein the filter insert adapts with the base of the filter insert to recesses in the container.

Abstract: Process for recovering (chloro)hydrocarbon-free hydrogen chloride and phosgene-free (chloro)hydrocarbons from a hydrogen chloride stream comprising (chloro)hydrocarbons and phosgene, which comprises i) in a first step, connecting a first adsorber and a second adsorber in series and passing the fresh hydrogen chloride stream comprising phosgene and (chloro)hydrocarbons firstly through the first adsorber and subsequently through the second adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the first adsorber, ii) in a second step, passing the fresh hydrogen chloride stream through the second adsorber while the first adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration, iii) in a third step, passing the fresh hydrogen chloride steam firstly through the second adsorber and subsequently through the regenerated first adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the second adsorber, iv) in a fourth step, passing

Abstract: A method for treating a gas containing sulfur, the method comprising the steps of: introducing a gas into a headspace of a vessel; passing the gas through a filtration medium contained in the vessel, wherein the filtration medium comprises sulfur-oxidizing organisms, wherein the gas is passed through the filtration medium in a generally downward direction; and irrigating the filtration medium with an aqueous liquid, wherein the pH of the aqueous liquid is at least 5.

Abstract: A method of cleaning the adsorbent media of a rotary concentrator in-situ while maintaining operation of the concentrator, including directing washing liquid into the sectors in the desorb plenum, then rotating the sectors one full revolution plus at least one sector into the desorb plenum to bring a second sector into the desorb plenum, washing the second sector and repeating the cycle until all of the adsorbent media is washed. The method may also include directing washing liquid into sectors not located in the desorb plenum.

Abstract: A process for concentrating and recovering methane and carbon dioxide from landfill gas includes absorption of commonly occurring pollutants using a carbon dioxide absorbent which itself may be in situ recoverable constituent. Separated methane is concentrated into a high heating value fuel, and a carbon dioxide product may also be recovered. Process streams may be used to provide fuel for compression and refrigeration and to regenerate carbon dioxide absorbent.

Abstract: A method of treating a gaseous hydrocarbon contained in waste gas by using adsorbent layers of single-tower or multi-tower configuration is characterized in that (1) double-cylinder type or multi-cylinder type adsorption apparatus, in which each adsorbent layer is indirectly cooled by cooling water, are employed as adsorption apparatus; (2) each adsorbent layer is a packed layer of one or more kinds of materials selected from activated carbon, synthetic zeolites and hydrophobic silica gel; (3) swing time required for switching between adsorption and desorption processes is set to 1 to 15 minutes; (4) each adsorbent layer is evacuated under vacuum while being purged by using part of clean gas evacuated from each adsorbent layer and/or air in the desorption process; and (5) the gaseous hydrocarbon is recovered from outflow purge gas. This method makes it possible to prevent abnormal temperature increase within each adsorbent layer and enhance the safety of the apparatus.

Abstract: An apparatus is provided for recovering volatile liquid vapor from an air-volatile liquid vapor mixture. The apparatus includes first and second reaction vessels. Each of these reaction vessel includes a bed of adsorbent having an affinity for the volatile liquid vapor. The apparatus also includes a pump and an absorber for regenerating either bed of adsorbent. Further, the apparatus includes a polisher including a polisher bed of adsorbent having an affinity for the volatile liquid vapor. This polisher bed adsorbs volatile liquid vapor and substantially clean air is exhausted when initially regenerating one of the two beds of adsorbent in the first and second reaction vessels. Still further, the apparatus also includes a cooperating valve and conduit system for interconnecting the other components. Further, the invention relates to a related process for recovering volatile liquid vapor and a method of reducing backpressure in a volatile liquid vapor recovery system or unit.

Abstract: A method is described for the preconditioning of an adsorbent, such as activated carbon, prior to charging the adsorbent into a reaction vessel of a vapor recovery system. The method includes the steps of (1) treating the adsorbent in order to establish in the adsorbent a residual heel of vapor of the type to be subsequently adsorbed in vapor recovery processing and (2) adding the treated and, therefore, preconditioned adsorbent to the reaction vessel of the vapor recovery system. In this way vapor recovery system downtime is significantly reduced.

Abstract: There is disclosed a method for removing a volatile component from a feed or process stream comprising (1) absorbing or adsorbing the volatile component into an absorbent or adsorbent material in an equilibrium process, wherein feed is pumped through a mixture chamber of a device, wherein the device comprises the mixture chamber and a vapor chamber, wherein the mixture chamber comprises a plurality of films comprising absorbent or adsorbent materials, wherein the film is configured to have a first side communicating with the mixture chamber and a second side communicating with the vapor chamber, and (2) removing the volatile component from the absorbent or adsorbent material by applying heat to the mixture chamber and simultaneously applying a gas phase within the vapor chamber such that the volatile component is collected in a gaseous state in the vapor chamber.

Abstract: A method for separating and analyzing the hydrocarbons, particularly heavy hydrocarbons, contained in sedimentary rocks, comprising:A) loading a sample tube with the sample of sedimentary rock and one or more inert solvents;B) preheating the sample tube;C) removing the solvent and the hydrocarbons previously contained in the rock;D) condensing the vapour and feeding it to a separation and analysis device.The invention also comprises an apparatus for implementing separating and analyzing method.

Abstract: An improved process for recovering one or more condensable compounds from inert gas-condensable compound vapor mixture is provided. The inert gas-condensable compound vapor mixture is flowed through a first bed of solid adsorbent whereby the condensable compounds are removed from the mixture and a residue gas stream comprised of substantially condensable compound-free inert gas is produced and disposed of, e.g., vented to the atmosphere. A second bed of solid adsorbent is evacuated by vacuum pumping using a cooled liquid seal vacuum pump. As the resulting inert gas-condensable compound vapor mixture is contacted with the cooled seal liquid of the liquid seal vacuum pump, a major portion of the condensable compounds are condensed. The condensed compounds are recovered and a portion thereof are cooled and recycled as cooled seal liquid for the vacuum pump.

Abstract: The invention relates to a process for cleaning a stream of crude gas and/or waste gas charged with hydrocarbon vapors resulting in recovery of the hydrocarbons. The process consists of adsorption, desorption, and condensation and/or absorption, and the adsorption is accomplished in two two-stage adsorber systems connected to each other in parallel. A charged stream of gas is first directed to the first adsorber system for coarse cleaning by a primary adsorber (2) and then for precision cleaning to a secondary adsorber (4) connected in series to the first adsorber. The hydrocarbons adsorbed in the primary adsorber (2) are desorbed by use of a vacuum pump (26) and the hydrocarbon vapors depleted of inert gas that are obtained are recovered in the condensation and/or absorption system (24) after compression in the vacuum pump (26) and the hydrocarbon components that are not condensed or absorbed are returned to the stream of crude gas.