Abstract: The present disclosure includes systems and methods that integrate a flare gas recovery process with a gas sweetening process used in oil and gas refining. A flare gas recovery system includes a primary gas sweetening unit and a liquid-driven ejector in continuous fluid communication with the primary gas sweetening unit. The ejector includes an inlet configured to receive a motive fluid including a regenerable amine solvent in a lean state from the primary gas sweetening unit, a gas inlet configured to receive a suction fluid including a gas, and a fluid outlet configured to either directly or indirectly discharge to the primary gas sweetening unit a two-phase fluid including a mixture of the suction fluid and the amine solvent in a rich state.

Abstract: A carbon dioxide capture system according to an embodiment includes a carbon dioxide capturer, a first washer, and a second washer. The first washer includes a spray configured to spray first cleaning liquid supplied under first pressure. The second washer includes a cleaning liquid diffuser configured to diffuse and drop second cleaning liquid supplied under second pressure lower than the first pressure.

Abstract: A process for treating effluent gas containing polycyclic aromatic hydrocarbons includes a step of spray scrubbing with a mineral oil in order to trap the hydrocarbons, wherein the mineral oil includes a mixture of aromatic mineral oil and naphthenic mineral oil.

Abstract: Tar-like components can be removed from gas streams resulting from gasification of coal, waste or biomass by contacting the gas with a liquid organic aryl polysiloxane. The polysiloxane preferably contains alkyl groups and aryl groups, and is in particular a polymethyl polyphenyl polysiloxane. The gas comprises one or more of hydrogen, carbon monoxide, carbon dioxide, and methane.

Abstract: A method for sorbing a gas using an ionic liquid to sorb a vapor having an electric multi-pole moment. The ionic liquid comprises an anion and a cation. The electric multi-pole moment may be an electric dipole moment and/or an electric quadru-pole moment. The sorption may be an adsorption or an absorption. The ionic liquid may be a liquid that substantially contains only anions and cations, while not containing other components, such as water. Alternatively, a solution containing the ionic liquid and a solvent or further compound, such as water, may be used.

Abstract: A method for removing acid gases from a fluid flow using an absorbent including an aqueous solution with at least two different amines. An amine in a proportion of greater than 50 wt. % of the total amine amount in the aqueous solution is the first amine component in the aqueous solution, and a sterically hindered amine in a proportion of less than 50 wt. % is the second amine component in the aqueous solution. The fluid flow is brought into contact with the absorbent at a partial pressure of <200 mbar.

Abstract: A gas condensate production plant comprises a plurality of separation units in which C2 and/or C3 lighter components are stripped from the separator feeds using compressed heated stripping vapor produced from the feed in respective downstream separation units. Contemplated plants substantially reduce heating and cooling duties by using the waste heat from the compressor discharges in the separation process. Furthermore, the multi-stage fractionation according to the inventive subject matter provides improved gas condensate recovery at reduced energy costs.

Abstract: In accordance with an embodiment, a carbon dioxide capturing apparatus includes a first absorbing unit, a regeneration unit, a water washing capturing unit, and a pre-amine capturing unit. The first absorbing unit brings a gas containing carbon dioxide into contact with an absorbing liquid containing an amine compound, and discharges the absorbing liquid which has absorbed carbon dioxide as a rich liquid. The regeneration unit releases a carbon dioxide gas from the rich liquid sent from the first absorbing unit. The water washing capturing unit captures the amine compound entrained in a decarbonated treatment gas sent from the first absorbing unit. The pre-amine capturing unit receives part of the rich liquid from the first absorbing unit, and traps the amine compound entrained in the decarbonated treatment gas by bringing the decarbonated treatment gas from the first absorbing unit into countercurrent contact with the part of the rich liquid.

Abstract: A method of removing contaminates from sour water is provided. The method includes producing raw sour water within a syngas production system, and removing the contaminates from the raw sour water using a chemical reaction within a treatment unit to produce treated sour water. The treatment unit is in flow communication with the syngas production system.

Abstract: A process for producing a pressurized CO2 stream in a power plant integrated with a CO2 capture unit, wherein the power plant comprises at least one gas turbine (1) coupled to a heat recovery steam generator unit (2) and the CO2 capture unit comprises an absorber (18) and a regenerator (21), the process comprising the steps of: (a) introducing hot exhaust gas exiting a gas turbine into a heat recovery steam generator unit to produce a first amount of steam and a flue gas stream (17) comprising CO2; (b) removing CO2 from the flue gas stream comprising CO2 by contacting the flue gas stream with absorbing liquid in an absorber (18) to obtain absorbing liquid enriched in CO2 (20) and a purified flue gas stream; (c) contacting the absorbing liquid enriched in CO2 with a stripping gas at elevated temperature in a regenerator (21) to obtain regenerated absorbing liquid and a gas stream enriched in CO2 (23); (d) pressurizing the gas stream enriched in CO2 using a CO2 compressor (24) to obtain the pressurized CO2 stre

Abstract: Absorption media for separating acidic gases such as C02 from a gas stream are disclosed. In some embodiments, the Absorption media include a solution of water, at least piperazine or a derivative of piperazine, and at least one alkali ion. The at least one alkali ion may be potassium. Methods and apparatus for separating acidic gases from a gas stream using such absorption media are also disclosed.

Abstract: A nitrogen-flush scrubber system for a controlled atmosphere room in which the amount of nitrogen required to flush the regenerated scrubber beds is significantly reduced. The present invention provides a dual-bed scrubber system in which low oxygen air salvaged from the active scrubber bed is used to flush high oxygen air from the regenerated scrubber bed prior to nitrogen flush. The scrubber system may include two scrubber beds that are used alternately to scrub air from the CA room. One scrubber bed is used as an active scrubber bed to remove carbon dioxide from the air. The inactive scrubber bed may be regenerated while it is inactive. When the active scrubber bed becomes sufficiently saturated, the control system may switch the active scrubber bed, using the regenerated bed as the active scrubber bed and allowing the saturated bed to be regenerated.

Abstract: Disclosed herein is a method comprising contacting a residual flue gas stream with a lean solution stream in an appendix stripper; where the residual flue gas stream comprises nitrogen, oxygen and moisture; and where the lean solution stream comprises ammonium, ammonium carbonate, ammonium bicarbonate and ammonium sulfate; forming a vapor phase that comprises ammonia vapor, water vapor, carbon dioxide and nitrogen; forming a liquid phase that comprises water, ammonium sulfate and ammonia; discharging the vapor phase to a capture system; and discharging the liquid phase to a direct contact cooler.

Abstract: A process and system (100) for removing contaminants from a solution to regenerate the solution within the system. The process includes providing a solution (165) from a wash vessel (160) to a stripping column (181), the solution (165) including contaminants removed from a flue gas stream (150) present in the wash vessel (160) and contacting the solution with steam (185) inside the stripping column (181) thereby removing the contaminants from the solution and regenerating the solution. The stripping column (181) is operated at a pressure less than about 700 kilopascal.

Abstract: The present invention relates to systems and processes for reducing the amount of carbon dioxide in a carbon dioxide-containing gas. In particular, the carbon dioxide-containing gas is contacted with a carbonate-containing solution. At least a portion of carbon dioxide in the carbon dioxide-containing gas is absorbed in the carbonate-containing solution to produce a carbon dioxide-, carbonate-containing solution. A heat recovery mechanism is employed to recover heat from the carbon dioxide-, bicarbonate-, carbonate-containing solution exiting the chamber to maintain the temperature of the chamber within a range of from about 50° C. to about 90° C.

Abstract: The invention provides a process for producing purified gas from feed gas comprising H2S, CO2 and HCN and/or COS, the process comprising the steps of: (a) contacting feed gas comprising H2S, CO2 and HCN and/or COS with a HCN/COS hydrolysis sorbent in the presence of water in a HCN/COS hydrolysis unit, thereby obtaining gas depleted in HCN and/or COS; (b) contacting the gas depleted in HCN and/or COS with absorbing liquid in an H2S/CO2 absorber to remove H2S and CO2, thereby obtaining the purified gas and absorbing liquid rich in H2S and CO2; (c) heating and de-pressurizing at least part of the absorbing liquid rich in H2S and CO2 to obtain hot flash gas enriched in CO2 and absorbing liquid enriched in H2S; (d) contacting the absorbing liquid enriched in H2S at elevated temperature with a stripping gas, thereby transferring H2S to the stripping gas to obtain regenerated absorbing liquid and stripping gas rich in H2S; and (e) leading at least part of the flash gas enriched in CO2 to the HCN/COS hydrolysis unit

Abstract: The invention relates to a method for separating off carbon dioxide from a gas mixture containing hydrogen, carbon monoxide and carbon dioxide, which gas mixture is produced as residual gas in an alcohol synthesis. The residual gas is subjected to a physical gas scrubbing in which carbon dioxide is scrubbed out of the residual gas in an absorption step by means of a low-temperature alcohol used as the scrubbing medium.

Abstract: The present invention provides a method and apparatus for the treat en of process gas from an anaerobic digestion system or a landfill gas system. In one embodiment, the system comprises a caustic scrubber including a vertical column having a top and a bottom and including a counter current flow system, wherein a process gas stream flows up vertically through the column in counter current flow to a caustic liquid solution that flows downward through the column.

Abstract: Process for the recovery of ethylene oxide (EO) from fat absorbent (FA) which comprises providing a feed of elevated temperature FA to an EO Stripper, providing a stripping gas feed and contacting the stripping gas feed at elevated temperature with the elevated temperature FA feed, obtaining stripped lean absorbent (LA) and an EO-containing gas, and providing one or more external process stream feeds to the EO Stripper at a location above the elevated temperature FA feed and at a lower temperature with respect to the elevated temperature FA feed thereby concentrating EO in the EO-containing gas. The process can also include one or more impurity removal stages in the form of one or more side draws from the EO Stripper or an EO Stripper Concentrator. The invention also includes an apparatus for performing the process.

Abstract: A nitrogen-flush scrubber system for a controlled atmosphere room in which the amount of nitrogen required to flush the regenerated scrubber beds is significantly reduced. The present invention provides a dual-bed scrubber system in which low oxygen air salvaged from the active scrubber bed is used to flush high oxygen air from the regenerated scrubber bed prior to nitrogen flush. The scrubber system may include two scrubber beds that are used alternately to scrub air from the CA room. One scrubber bed is used as an active scrubber bed to remove carbon dioxide from the air. The inactive scrubber bed may be regenerated while it is inactive. When the active scrubber bed becomes sufficiently saturated, the control system may switch the active scrubber bed, using the regenerated bed as the active scrubber bed and allowing the saturated bed to be regenerated. Before switching, the regenerated bed is purged to reduce the oxygen level, which increased during regeneration.

Abstract: The present invention relates to a carbon dioxide absorbent, an ionic liquid obtained by reacting amide and an organic acid and a method of using the same. The amidium-based ionic liquid of the present invention has excellent CO2 absorption capability, which is hardly reduced even with repeated use, is easy to synthesize and has low manufacturing cost thus being useful as a CO2 absorbent.

Abstract: A dehumidifier system having a dehumidifier section within which liquid desiccant absorbs moisture from air flowing therethrough and a dehumidifier section within which the desiccant is regenerated employs a heat exchanger for maintaining a relatively high temperature differential between the desiccant contained within the dehumidifier and regenerator sections. The desiccant which is conducted to either the dehumidifier section or the regenerator section is separated into multiple streams, and the multiple streams are treated differently from one another before being discharged into preselected segments of the air flow moving through the corresponding one of the dehumidifier section and the regenerator section. A control scheme in the system is capable of altering, and thereby improving, the concentration level of desiccant utilized in the system.

Abstract: The invention involves a process for maintaining a low level of carbon monoxide in a carbon dioxide product stream and also for keeping the carbon monoxide out of the fully shifted synthesis gas. The overall process is a process for treating both fully shifted and partially shifted or unshifted synthesis gas. The carbon monoxide is separately removed by a carbon monoxide stripping column and returned to the partially shifted or unshifted synthesis gas which can then undergo a shift reaction to convert the carbon monoxide to carbon dioxide.

Abstract: Method and system to capture target gases from all kind of point-sources, as well as from ambient air and surface waters, sediments or soils by advantage of large differences in Henrys law constants. For gas dissolution in water the constants favor dissolution of e.g. CO2 compared to the main constituents of flue gases like N2 and O2. The main principle is to dissolve the gases—release of the non-dissolved part stripping the liquid for the dissolved gases, which are enriched in target gas. Further steps can be used to reach a predetermined level of target gas concentration.

Abstract: A system, method and apparatus for treating a waste gas stream containing on or more hydrocarbon contaminants such polycyclic aromatic hydrocarbons (PAH). The system, method and apparatus may include a heat treatment chamber having a recycling apparatus that includes a supply of a food oil solvent; a mixing device to mix the solvent with the waste gas stream. The system, method and apparatus dissolve the hydrocarbon contaminants from the gas stream into a solvent containing the food oil.

Abstract: Systems and processes disclosed herein relate to the utilization of direct contact condensing to provide heat to a solvent regeneration loop in an acid gas removal process. A first direct contact condenser can be included in the upper section of a concentrator that removes acid gas from a rich solvent stream. A first slip stream can be heated in the first direct contact condenser and can be combined with the rich solvent stream in the lower section of the stripper. A second direct contact condenser can be included in the lower section of an absorber that removes acid gas from a feed gas. A second slip stream can be heated in the second direct contact condenser, and can be combined with the rich solvent stream before the rich solvent stream is provided to the concentrator.

Abstract: Systems and methods for treating water. Water containing one or more thermally destructible contaminants can be contacted with one or more oxidants to provide an effluent containing essentially contaminant-free water and a recycle containing the one or more oxidants and at least a portion of the one or more thermally destructible contaminants. The one or more thermally destructible contaminants in the recycle can be thermally destroyed using one or more combustion processes.

Abstract: Systems and methods for treating water. Water containing one or more thermally destructible contaminants can be contacted with steam to provide an effluent containing essentially contaminant-free water and a recycle containing the steam and at least a portion of the one or more thermally destructible contaminants. The one or more thermally destructible contaminants in the recycle can be thermally destroyed using one or more combustion processes.

Abstract: A method of assembling a gas removal system for an integrated gasification combined cycle is provided. The method includes coupling a first rich solvent tank in flow communication with the integrated gasification combined cycle to store a first emissions-rich solvent discharged from the integrated gasification combined cycle and coupling a first stripper in flow communication with the first rich solvent tank to facilitate removing gases from the first emissions-rich solvent. The method also includes coupling an absorber in flow communication with the first stripper to receive gases from the first stripper and create a second emissions-rich solvent and coupling a second rich solvent tank in flow communication with the absorber to store the second emissions-rich solvent.

Abstract: Stripping column and process for extracting a component from a liquid medium using a gas, the stripping column comprising a vertical column (10) comprising an essentially cylindrical wall (54), the vertical column (10) being divided by horizontal perforated plates (20) into a series of superposed chambers (11, 12, . . . , 16, 17), each chamber (11, 12, . . . , 16, 17) comprising several vertical partitions (34, 34I, 34II, 34III, 34IV, 34V) positioned so as to form chicanes, an upper chamber (17) comprising at least one liquid medium inlet port (28). According to one important aspect of the invention, the upper chamber (17) comprises a liquid medium receiving zone (90), the receiving zone (90) being configured so as to be able to carry out a degassing of the liquid medium in the receiving zone (90).

Abstract: A method and apparatus for utilizing an amine-based absorption compound for flue gas, or combustion gas, CO2 capture, according to embodiments of the present invention. In some embodiments, CO2 is delivered from a wet, or dry, flue gas scrubber to an absorber. The amine-based absorption compound is introduced in an aqueous solution to the absorber, which is located downstream of the wet, or dry, flue gas scrubber. In some embodiments, the CO2-laden amine-based absorption compound is then subjected to a regeneration step to regenerate the CO2-laden amine-based absorption compound and strip out absorbed CO2. In some embodiments, energy is supplied to a stripper through a reboiler to accomplish the regeneration step.

Abstract: The present invention is a biogas processing system having a compressor having a biogas input and output, a pump having a water input and output, a scrubber tower having a mixing chamber connected to a biogas input, a water pump input, a water output, and a processed biogas output, and a filtration member connected to the water output to remove contaminants from the water exiting the first scrubber tower. The system also includes devices for heating and cooling the recycled flow of water to enhance the ability of the water to absorb contaminants from the biogas and the ability of a stripper to remove absorbed contaminants from the water in a closed loop water system, and a controller for closely controlling the operating parameters of the system to achieve safe and optimal operation of the system.

Abstract: Methods and apparatus for generating a vapor to be injected into a flue gas stream are described. Apparatus comprises a fluid vaporization and injection assembly further comprising: a stripper for producing first ammonia vapor and a first aqueous ammonia solution from a second aqueous ammonia solution; a reflux tank for producing a second ammonia vapor and the second aqueous ammonia solution from the first ammonia vapor and the first aqueous ammonia solution; and a first outlet for outputting the second ammonia vapor for introduction into the flue gas.

Abstract: The invention involves a process for maintaining a low level of carbon monoxide in a carbon dioxide product stream and also for keeping the carbon monoxide out of the fully shifted synthesis gas. The overall process is a process for treating both fully shifted and partially shifted or unshifted synthesis gas. The carbon monoxide is separately removed by a carbon monoxide stripping column and returned to the partially shifted or unshifted synthesis gas which can then undergo a shift reaction to convert the carbon monoxide to carbon dioxide.

Abstract: Compositions and methods related to the removal of acidic gas. In particular, the present disclosure relates to a composition and method for the removal of acidic gas from a gas mixture using a solvent comprising a diamine (e.g., piperazine) and carbon dioxide. One example of a method may involve a method for removing acidic gas comprising contacting a gas mixture having an acidic gas with a solvent, wherein the solvent comprises piperazine in an amount of from about 4 to about 20 moles/kg of water, and carbon dioxide in an amount of from about 0.3 to about 0.9 moles per mole of piperazine.

Abstract: A power generation plant (112), a method, and a CO2 capture system (122) for removing carbon dioxide (104) from a flue gas stream (106) are disclosed. As shown in FIG. 2, a CO2 capture system (122), comprises an absorber vessel (202), a water wash vessel (210), and a stripper (214). The CO2 capture system (122) can be configured to introduce both a lean ionic ammonia solution (204) from a regeneration system (124) and a flue gas stream (106) from a cooling system (120) and to provide a rich ionic ammonia solution (206) to a regeneration system (124), wherein the introduction of the lean ionic ammonia solution (204) to the flue gas stream (106) produces a flue gas substantially devoid CO2 (224). The water wash vessel (210) can be configured to receive the flue gas substantially devoid CO2 (224) and produce ammoniated water (212) by introducing water (218) to the flue gas substantially devoid CO2 (224).

Abstract: The invention relates to an apparatus for the transfer of organic compounds from a first liquid phase to a gaseous phase and from said gaseous phase to a second liquid phase, comprising a packed stripping column (2), a housing (5), a shell (1), a means for introducing the gaseous phase at the bottom end of said packed stripping column (2), a distributor (4) for distributing said first liquid phase onto said packed stripping column (2), causing said first liquid phase to trickle down said packed stripping column (2) counter-currently to the flow of the gas phase and causing the gas stream leaving said packed stripping column (2) at its top end to have a higher content of organic compounds than the gaseous phase introduced at the bottom end of said packed stripping column (2), one or more ducts (9/26) allowing the gaseous phase leaving said packed stripping column (2) to flow downwards to the bottom end of a packed scrubber (3) enclosed in a housing (25), a distributor (12) on top of said packed scrubber (3) ca

Abstract: A method and system for reducing an amount of ammonia in a flue gas stream. The system 100 includes: a wash vessel 180 for receiving an ammonia-containing flue gas stream 170, the wash vessel 180 including a first absorption stage 181a and a second absorption stage 181b, each of the first absorption stage 181a and the second absorption stage 181b having a mass transfer device 184; and a liquid 187 introduced to the wash vessel 180, the liquid 187 for absorbing ammonia from the ammonia-containing flue gas stream 170 thereby forming an ammonia-rich liquid 192 and a reduced ammonia containing flue gas stream 190 exiting the wash vessel 180.

Abstract: In an FCC apparatus in which swirl arms are used to discharge gas and catalyst from a riser, a baffle is used to direct descending catalyst away from a wall of a disengaging vessel proximate a stripping section comprising elongated strips of metal.

Abstract: Systems, methods, and apparatus for capturing CO2 using a solvent are provided. A gas that includes carbon dioxide may be mixed with a solvent that is operable to absorb at least a portion of the carbon dioxide from the gas. The solvent containing the carbon dioxide may be provided to at least one removal system operable to remove at least a portion of the liquid contained in the solvent. The solvent output by the removal system may be stripped to extract at least a portion of the carbon dioxide from the solvent.

Abstract: An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of A) at least one cyclic amine compound having solely tertiary amine groups and/or sterically hindered secondary amine groups and B) at least one cyclic amine compound having at least one sterically unhindered secondary amine group. The absorption medium comprises, e.g., an aqueous solution of A) 1-hydroxyethylpiperidine and/or triethylenediamine and B) piperazine. The absorption medium is particularly suitable for separating off carbon dioxide from flue gases and satisfies the following criteria: (i) sufficient capacity at low CO2 partial pressures; (ii) sufficiently rapid absorption rate at low CO2 partial pressures; (iii) stability toward oxygen; (iv) low vapor pressure for reducing solvent losses; and (v) low energy requirement for regeneration of the absorption medium.

Abstract: The present invention relates to a process for removing carbon dioxide and optionally hydrogen sulphide and/or COS from a gas stream containing these compounds by washing the gas with an aqueous washing solution containing water, sulfolane and a secondary or tertiary amine derived from ethanolamine. More particularly the invention relates to the process described above, the process being carried out in the presence of a primary or secondary amine compound in an amount between 0.5 and 15 wt. % based on water, sulfolane and amine. The invention further relates to an absorbent liquid to be used in the above process.

Abstract: A system and methods of reducing sulfur emissions are provided. In one embodiment, a method for reducing sulfur emissions is provided. The method includes routing at least a portion of an untreated gas to a low pressure absorber, removing at least a portion of sulfur from the untreated gas to create a low pressure absorber overhead gas, and further processing the low pressure absorber overhead gas.

Abstract: The present invention relates to a vent gas adsorption system and a method of recovering volatile organic compounds (VOCs), more particularly to a vent gas adsorption system devised to effectively adsorb VOCs included in the vent gas and reduce VOC content of the vent gas, and a method of recovering VOCs.

Abstract: A method for displacing acid gas constituents from natural gas to acid gas removal installations equipped with Claus installations with free capacities utilizes a portion of the acid gas which is removed from a first flow of natural gas containing acid gas. The acid gas removed from the first flow of natural gas is fed to at least one other acid gas removal installation, whereby this feeding results in the acid gas removed from the first flow of natural gas being mixed with at least one second flow of natural gas with which it is transported to at least one other acid gas removal installation.

Abstract: The invention relates to a method for producing a high-molecular polycondensate from a solidified polycondensate prepolymer by solid phase polycondensation. According to said method, the polycondensation cleavage products of the solid phase polycondensation reaction are extracted from the product by means of a process gas, and the process gas is then cleaned of the polycondensation cleavage products and essentially recycled. According to the invention, the specific energy input is less than 120 kWh/t, preferably less than 110 kWh/t and especially between 70 and 100 kWh/t. The invention also relates to an installation for producing a high-molecular polycondensate, said installation comprising a heating appliance (1), followed by a crystallisation appliance (2), a reaction appliance (4), and a cooling appliance (5).

Abstract: The invention provides a process for treating a loaded solvent stream having a time-varying contaminant concentration, the process comprising the steps of: (a) providing a plurality of hold-up tanks; (b) feeding the loaded solvent stream in dependence on its contaminant concentration to one or more of the hold-up tanks and; (c) allowing lowed solvent to flow from the plurality of hold-up tanks to obtain a smoothed loaded solvent stream having a reduced time-varying contaminant concentration. The invention further provides a treating unit comprising a circuit for circulating a solvent stream, which circuit includes a device for smoothing contaminant peak concentrations, said device comprising a plurality of hold-up tanks each hold-up tank having at least one inlet and an outlet equipped with an outlet valve, the device further comprising an inlet distributor allowing the control of solvent flow to one or more of the hold-up tanks.

Abstract: Compositions and methods related to the removal of acidic gas. In particular, the present disclosure relates to a composition and method for the removal of acidic gas from a gas mixture using a solvent comprising a diamine (e.g., piperazine) and carbon dioxide. One example of a method may involve a method for removing acidic gas comprising contacting a gas mixture having an acidic gas with a solvent, wherein the solvent comprises piperazine in an amount of from about 4 to about 20 moles/kg of water, and carbon dioxide in an amount of from about 0.3 to about 0.

Abstract: An integrated environmental control system for cabin air of an aircraft or spacecraft. Humidity and temperature of cabin air are controlled with a direct contact liquid air contaminant control system that revitalizes cabin air by removal of carbon dioxide and other trace gas contaminants through use of a direct contact air, liquid scrubber element and stripper element. The scrubber element has two rotor elements rotatably mounted in a housing first for centrifugal separation of an air flow and liquid absorbent mixture which liquid absorbent has absorbed carbon dioxide and trace gas contaminants. Then second for centrifugal separation of an air flow and acid water wash mixture which acid water wash has liquid absorbent and other contaminants. The processed air is then passed through a charcoal bed filter for further removal of contaminants. A rotary contact processor may also be used to reprocess contaminated liquid absorbent for reuse.

Abstract: A process for recovering light Fischer-Tropsch hydrocarbons from a rich tail gas produced from a Fischer-Tropsch synthesis operation which comprises: (a) recovering separately from a Fischer-Tropsch synthesis operation a Fischer-Tropsch condensate and a hydrocarbon rich Fischer-Tropsch tail gas; (b) cooling the Fischer-Tropsch condensate and Fischer-Tropsch tail gas; (c) using the cooled Fischer-Tropsch condensate as a lean oil to adsorb at least a portion of the light Fischer-Tropsch hydrocarbons present in the Fischer-Tropsch tail gas, whereby a rich oil mixture comprising Fischer-Tropsch condensate and light Fischer-Tropsch hydrocarbons is formed; and (d) collecting the rich oil mixture.