Abstract: It has been discovered that mixed-alcohol production can utilize the waste tail gas stream from the pressure-swing adsorption section of an industrial hydrogen plant. Some variations provide a process for producing mixed alcohols, comprising: obtaining a tail-gas stream from a methane-to-syngas unit (e.g., a steam methane reforming reactor); compressing the tail-gas stream; separating the tail-gas stream into at least a syngas stream, a CO2-rich stream, and a CH4-rich stream; introducing the syngas stream into a mixed-alcohol reactor operated at effective alcohol synthesis conditions in the presence of an alcohol-synthesis catalyst, thereby generated mixed alcohols; and purifying the mixed alcohols to generate a mixed-alcohol product.

Abstract: A co-axial co-current contactor (CA-CCC) is described herein. The CA-CCC includes an outer annular support ring and an inner annular support ring configured to maintain the CA-CCC within an outer pipe and an inner pipe, respectively. The CA-CCC includes rich liquid flow channels located between the outer annular support ring and the inner annular support ring that are configured to allow a rich liquid stream to flow through the CA-CCC, and a central gas entry cone and gas flow channels configured to allow a gas stream to flow through the CA-CCC. The CA-CCC further includes radial blades configured to secure the central gas entry cone to the inner annular support ring and allow a lean liquid stream to flow into the central gas entry cone and the gas flow channels. The CA-CCC provides for efficient incorporation of liquid droplets formed from the lean liquid stream into the gas stream.

Abstract: In a preferred embodiment, there is provided a process for separating an amine compound or a conjugate acid thereof and a carbamate compound or a conjugate acid thereof from a mixture having the amine compound, the carbamate compound, carbon dioxide and at least one anionic contaminant salt using an anionic exchange column, the process including passing the mixture through the column to obtain a first effluent and passing through the column an extraction fluid to obtain a second effluent, where the extraction fluid most preferably includes carbonic acid.

Abstract: Hydrocarbon gas treatment systems and methods. The hydrocarbon gas treatment systems include a feed gas supply system configured to provide a feed gas stream and a hydrogen sulfide removal system configured to separate the feed gas stream into a product gas stream and an acid gas stream. The hydrocarbon gas treatment systems also include a heat exchanger configured to cool the acid gas stream to generate a cooled acid gas stream and an acid gas enrichment system configured to separate the cooled acid gas stream into a treated gas stream and an enriched acid gas stream. The methods include providing a feed gas stream, separating the feed gas stream into a product gas stream and an acid gas stream, cooling the acid gas stream to generate a cooled acid gas stream, and separating the cooled acid gas stream into a treated gas stream and an enriched acid gas stream.

Abstract: A method of removing material that fouls processing equipment that includes applying a composition comprising N,N-dimethylacetamide (DMAC) to fouling material deposited on the processing equipment to solubilize and remove the fouling material from the processing equipment.

Abstract: An absorption column is equipped with: a CO2 absorption section absorbing CO2 from CO2-containing exhaust gas using a lean solution; a main rinse section recovering an entrained CO2 absorbent using rinse water; a rinse water circulation line circulating a rinse water containing the CO2 absorbent recovered in a liquid storage section of the main rinse section; a pre-rinse section provided between the CO2 absorption section and the main rinse section; a rinse section extraction liquid supply line extracting a portion of the rinse water containing the CO2 absorbent from the rinse water circulation line, and introducing the same into a reflux section of an absorption liquid regeneration tower; and a refluxed water supply line extracting a portion of refluxed water, introducing the same as pre-rinse water for the pre-rinse section, and connected on the pre-rinse section side.

Abstract: A filtration membrane device which uses a filter to collect solid contents remaining in a branched lean solution cleans the filter by using a low-concentration CO2 absorption liquid circulating within the system as cleaning water (containing the absorption liquid); rough cleaning, which returns the low-concentration CO2 absorption liquid used for cleaning to a lean solution supply line, is performed; the filter is finish-cleaned by cleaning water from outside the system which does not include the CO2 absorption liquid; the CO2 absorption liquid which is adhered to the solid contents is washed and removed; finish-cleaning water which includes the CO2 absorption liquid is returned to the lean solution supply line the moisture content within the system is maintained at a prescribed value by adjusting the water balance in an absorption tower and the concentration of the CO2 absorption liquid which circulates within the system is kept at a prescribed concentration.

Abstract: A sustainable method and a system for cleaning impurities, mainly hydrogen sulphide, and upgrading of biogas having hydrogen sulphide concentration up to 2% (20,000 ppmv), preferably produced in wastewater treatment plants (WWTPs) to biomethane. The system includes a counter-current, non-pressurized physical absorption bubble column having a high influent liquid-to-gas flow ratio LI/G higher than 1 and preferably equal or higher than 3 and equal or lower than 10, for achieving a simultaneous removal of hydrogen sulphide and carbon dioxide. The system may be inserted for instance on an existing wastewater treatment plant, in such a way that the wash water is the primary treated wastewater of the plant, and preferably the biogas to be upgraded is produced in the anaerobic digesters of the plant itself, and also includes means for regenerating the used wash water by the biological reactor of the plant itself used for the secondary treatment.

Abstract: A multistage gas washing system is applied for dust separation from crude gases of entrained flow gasification of pulverized fuels under pressures up to 10 MPa and temperatures which are greater than the melting point of the fuel ash. A first stage comprises a modified quenching system and a downstream washing column, which operates as a bubble column. A second washing stage comprises one or more Venturi washers connected in series. A third washing stage comprises multiple high-pressure atomization units of washing water, a partial condenser for cooling the crude gas by 1 to 15° C. with condensate formation, and a separation column, which is equipped with washing surfaces and a plastic-coated demister.

Abstract: An object of the present invention is to provide a CO2 removal apparatus that prevents release of an amine compound of an absorbing solution from a CO2 absorption device. The CO2 removal apparatus includes a desorption column 13 that heats and regenerates an amine compound aqueous solution discharged from a decarbonator 1 making counterflow contact of a combustion exhaust gas and an amine compound aqueous solution; and reflux means that refluxes an amine compound aqueous solution regenerated in the desorption column 13 to the decarbonator 1 via a cooler 19. A contact section that makes counterflow contact of reflux water of the desorption column 13 and a CO2-removed combustion exhaust gas is formed in two stages, and the cooler 19 on the downstream side of the desorption column is also formed in two stages. Reflux water from the first stage cooler is supplied to the first stage contact section, and reflux water from the second stage cooler is supplied to the second stage contact section.

Abstract: Methods and compositions useful, for example, for physical solvent carbon capture. A method comprising: contacting at least one first composition comprising carbon dioxide with at least one second composition to at least partially dissolve the carbon dioxide of the first composition in the second composition, wherein the second composition comprises at least one siloxane compound which is covalently modified with at least one non-siloxane group comprising at least one heteroatom. Polydimethylsiloxane (PDMS) materials and ethylene-glycol based materials have high carbon dioxide solubility but suffer from various problems. PDMS is hydrophobic but suffers from low selectivity. Ethylene-glycol based systems have good solubility and selectivity, but suffer from high affinity to water. Solvents were developed which keep the desired combinations of properties, and result in a simplified, overall process for carbon dioxide removal from a mixed gas stream.

Abstract: Methods and systems are provided for treating hydrogen sulfide rich sour gas through a series of fractionation columns. The processes disclosed herein and the variations thereof provide optimized processes for the removal of hydrogen sulfide from sour gas through the introduction of innovative azeotrope breakers, novel configurations of process equipment, and optimized operating conditions. Advantages of certain embodiments of the present invention include reduced equipment requirements, improved process efficiencies, reduced operating costs, and reduced capital costs. Other advantages include better process suitability to certain environmental conditions such as the arctic cold when compared to conventional amine treatment processes.

Abstract: The CO2 capture system by chemical absorption for removing CO2 from a combustion exhaust gas by a solvent, comprising: an absorber for absorbing CO2 by a solvent, a regenerator for heating a rich solvent absorbed CO2 thereby releasing CO2, a gas exhaust system for discharging gas from the regenerator, a gas compressor installed in the gas exhaust system, a heat exchanger disposed downstream of the gas compressor for exchanging heat between compressed gas and rich solvent to be supplied to the regenerator, a gas-liquid separator disposed downstream of the heat exchanger for separating gas from condensed water, a condensed water supply system for supplying condensed water from the gas-liquid separator to the regenerator, another gas exhaust system for discharging gas containing high-concentration CO2 from the gas-liquid separator, and a compressor disposed downstream of the gas-liquid separator in the another gas exhaust system for pressurizing the gas containing high-concentration CO2.

Abstract: The present invention provides strategies for reducing the nitrosamine content of amine compositions that are contaminated with one or more nitrosamines. The present invention is based apart upon the appreciation that irradiating contaminated amine compositions with a suitable fluence of electromagnetic energy, such as ultraviolet energy, is able to selectively decompose the nitrosamine content relative to the amine content. This allows the amine content of the treated compositions to be preserved. As a consequence, the principles of the present invention are particularly useful for regenerating amine absorbents. Reducing the nitrosamine content so easily also facilitates disposal, further processing, or other desired handling of amine compositions.

Abstract: The CO2 capture system by chemical absorption for removing CO2 from a combustion exhaust gas by a solvent, comprising: an absorber for absorbing CO2 by a solvent, a regenerator for heating a rich solvent absorbed CO2 thereby releasing CO2, a gas exhaust system for discharging gas from the regenerator, a gas compressor installed in the gas exhaust system, a heat exchanger disposed downstream of the gas compressor for exchanging heat between compressed gas and rich solvent to be supplied to the regenerator, a gas-liquid separator disposed downstream of the heat exchanger for separating gas from condensed water, a condensed water supply system for supplying condensed water from the gas-liquid separator to the regenerator, another gas exhaust system for discharging gas containing high-concentration CO2 from the gas-liquid separator, and a compressor disposed downstream of the gas-liquid separator in the another gas exhaust system for pressurizing the gas containing high-concentration CO2.

Abstract: Systems and methods for separating CO2 and H2S from a natural gas stream are provided herein. The system includes a first loop of co-current contacting systems configured to remove H2S and CO2 from a natural gas stream and a second loop of co-current contacting systems configured to remove the H2S from the CO2.

Abstract: A vertically oriented co-current contacting system and methods for separating impurities from a gas stream including a vertically oriented co-current contactor (VOCC) located in-line within a pipe, a vertically oriented mixer (VOM) including an annular support ring configured to maintain the VOM within the pipe, a number of radial blades configured to allow a liquid stream to flow into the VOM, and a central gas entry cone configured to allow a gas stream to flow through a hollow section within the VOM, a vertically oriented mass transfer section downstream of the VOM. The VOM and the vertically oriented mass transfer section provide for efficient incorporation of liquid droplets including impurities from the gas stream formed from the liquid stream into the gas stream. The vertically oriented co-current contacting system also includes a separation system configured to remove the liquid droplets.

Abstract: The invention relates to a method and to a device for physical gas scrubbing, wherein a feed gas (1) containing hydrogen, carbon monoxide, carbon dioxide and also carbonyl sulphide and/or hydrogen sulphide is conducted through a first scrubbing section (W1) in countercurrent to a scrubbing medium preloaded with carbon dioxide, in order to separate sulphur components substantially selectively off from the feed gas and to generate a desulphurized gas mixture (3). In a second scrubbing section, carbon dioxide is separated off from only a subquantity of the desulphurized gas mixture by scrubbing with an unloaded scrubbing medium (4) and the resultant carbon dioxide-preloaded scrubbing medium is used completely in the first scrubbing section (W1) as scrubbing medium.

Abstract: The CO2 recovery apparatus is provided with a CO2 absorption portion for absorbing CO2 in a CO2-containing exhaust gas by a CO2 absorbing liquid, a water washing portion provided on the upper portion side of the CO2 absorption portion so as to cool a CO2-removed exhaust gas and also recover the accompanying CO2 absorbing liquid, a washing liquid circulation line for directly circulating a washing liquid containing the CO2 absorbing liquid recovered in the water washing portion, an extraction line for extracting part of the washing liquid containing the CO2 absorbing liquid as an extracted liquid from the washing liquid circulation line, a concentration portion for separating a gas component (water vapor) from the extracted liquid while concentrating the CO2 absorbing liquid, and a concentrated liquid feed line for feeding a concentrated liquid concentrated in the concentration portion to the side of an absorbing liquid regeneration tower.

Abstract: The present relates to a process for optimizing the recovery of unreacted monomers from a polymerization process, wherein said process comprises the steps of recovering a fluid stream generated by the separation of the polyolefin product from the polymerization fluid comprising unreacted monomers and optionally comonomers; contacting said fluid stream in an absorption zone with a scrub liquid comprising at least one C4-10 hydrocarbons, thereby absorbing at least a portion of the unreacted monomers in said scrub liquid; and withdrawing from said absorption zone (i) a vapor overhead comprising light gas and (ii) an absorber bottoms scrub liquid comprising said C4-10 hydrocarbons and said unreacted monomer; thereby recovering said unreacted monomer in said absorber bottoms scrub liquid comprising said C4-10 hydrocarbons.

Abstract: A CO2 recovery device includes: a CO2 absorption unit for absorbing CO2 in a CO2-containing flue gas, by a CO2 absorbent; a washing unit for cooling a CO2-removed flue gas and recovering the accompanying CO2 absorbent; a circulation line for directly circulating wash water; an extraction line for extracting a part of the wash water containing the CO2 absorbent as an extracted fluid; a first gas-liquid separation unit for separating a gas component from the extracted fluid; a concentration unit for concentrating the CO2 absorbent contained in the extracted fluid and separating the gas component; a concentrated fluid return line through which a concentrated fluid returns to the CO2 absorption unit provided below the washing unit; and a gas inlet line through which the separated gas component is introduced into an absorber.

Abstract: The invention is directed to a method for separating gases in a mixed gas feed stream, and to an apparatus for carrying out said method.

Abstract: A method of reducing siloxane contamination in an effluent gas is described, where one embodiment of the method comprises directing the effluent through a reactor comprising a dialkyl terminated glyme solvent having a molecular size less than about 300 Daltons, the dialkyl terminated glyme serving to physically absorb the siloxanes from the effluent; polymerizing the siloxanes by directing them through a packed bed of acidic resin catalyst media housed within the reactor and immersed within the solvent so as to create polymerized siloxanes having a molecular size greater than about 300 Daltons, that are soluble in the solvent; and separating the polymerized siloxanes from the solvent via nanofiltration; and recycling the solvent into the reactor for further physical absorption of incoming siloxanes.

Abstract: An absorption column 1 for separating CO2 and a second acid gas from a gas stream, the column comprising a first and second section (4, 5) for the absorption of CO2 and the second acid gas; a solvent inlet in the second section for the addition of liquid stream 3 including an absorbent liquid for CO2 and the second acid gas; a gas inlet (21) in the first section for the addition of a gas stream (2) containing CO2 and the second acid gas; a gas outlet (15) in the second section of the column; a first solvent outlet (22) for the removal of at least a portion of the solvent (6) from the second section of the column and a second solvent outlet (23) for solvent stream (11) from the first section of the column; and a liquid flow distributor arrangement (8) to allow a portion of the solvent to flow from the second section of the column to the first section. A method of operating the apparatus and method of solvent extraction is also disclosed.

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: Combining flue gas treatment, and in particular CO2 sequestration, with hardening of reverse osmosis (RO) permeate. Flue gas is compressed and injected into pressurized water, being either cooling water or RO permeate. The water with dissolved CO2 is either dispensed into the sea for biological fixation of the CO2 or, in the case of RO permeate, mixed with limestone to harden the product water.

Abstract: A separation apparatus for carbon dioxide is provided which includes an absorption unit for absorbing flue gas from a fossil-fueled power station, a desorption unit and a heat exchanger which on the primary feed side is connected via an inlet-side feedback line to the desorption unit, and on the discharge side is connected via an outlet-side feedback line to the absorption unit. On the secondary feed side, the heat exchanger is connected via an inlet-side feed line to the absorption unit, and on the discharge side is connected via an outlet-side feed line to the desorption unit. A first bypass line connects the inlet-side feedback line to the outlet-side feed line so that a mostly closed first circuit with the desorption unit is formed, and a second bypass line connects the inlet-side feed line to the outlet-side feedback line so a mostly closed second circuit with the absorption unit is formed.

Abstract: A method for removing impurities from a feed air gas stream prior to the stream being fed to a cryogenic distillation unit. The feed air gas stream contacts an ionic liquid which adsorbs the impurities from the air. The method can use one or more beds such as in pressure swing adsorption processes.

Abstract: This invention provides novel compositions comprising substituted polyamines as acid gas scrubbing solutions and methods of using the compositions in an industrial system. The invention relates to the use of such polyamine compounds in industrial processes to remove acidic contaminants from natural and industrial fluid streams, such as natural gas, combustion gas, natural gas, synthesis gas, biogas, and other industrial fluid streams. The compositions and methods of the invention are useful for removal, absorption, or sequestration of acidic contaminants and sulfide contaminants including CO2, H2S, RSH, CS2, COS, and SO2.

Abstract: A method and apparatus for drying a natural gas or an industrial gas that contains acidic gas components, wherein gas drying is followed by the removal of the acidic gas components from the dried gas. The same physical solvent is used for both of the process steps of gas drying and of acidic gas removal. The gas to be dried is brought into contact with the physical solvent, which absorbs most of the water contained in the gas. The physical solvent, loaded with water, is transferred into a solvent regenerating device to be heated where the water contained in the solvent is stripped from the solvent in the countercurrent by acidic gas that is removed from the dried useful gas during the acidic gas absorption. The acidic gas being released again in the acidic gas solvent regenerating device, stripped from the solvent, and discharged from the solvent regenerating device.

Abstract: A process for the drying of gases which are routed through two or more gas coolers connected in series. The coolers being supplied with a solvent stream absorbing water from the gas entering the respective cooler, with a mixed stream consisting of gas and solvent entering each of these gas coolers, then being routed through the respective cooler and, after joint cooling in the respective cooler, being separated by a gas/liquid separator in the outlet of the respective cooler into a gas stream of reduced water content and a solvent stream laden with water. The water content of the gas is successively reduced from the first cooler to the last cooler and the solvent stream separated and laden with water being either used as feed stream for the upstream cooler or directly returned to the solvent regeneration unit where the water-enriched solvent is again freed from water.

Abstract: The method and system for methane separation and purification from a biogas includes collecting a raw Biogas gas stream having methane, carbon dioxide, water, sulfur compounds and non-methane organic compound (NMOC) constituents. The Biogas stream is fed into the intake of a liquid sulfur scrubber or a sulfur adsorber unit where the Biogas is separated into a main gas stream routed downstream in the system and a sulfur compounds stream removed from the system. The main gas stream is then processed by an NMOC absorber and further downstream, by an NMOC adsorber. NMOC produced by both NMOC processes is liquefied, removed from the system and stored. Upstream from the NMOC processes, the main gas stream is processed by at least one CO2, N2, O2 gas separation unit that produces a usable product stream of enriched methane gas, and an off-gas stream, which a VPSAU processes for venting and recycling.

Abstract: A method for the recovery of hydrogen sulphide and other acid gas fractions from sour wellsite gas in hydrocarbon production is provided. The selected acid gas fractions are absorbed into a noncorrosive and transportable solvent solution at the wellsite, the rich solvent solution being transported to a central plant location where it is desorbed from the solvent solution for further handling or processing. The lean solvent solution can then be recycled. Multiple acid gas fractions could be recovered from the sour gas in question using a single appropriate solvent solution. Carbon dioxide could be absorbed and desorbed at the wellsite rather than at the central plant location. Clean gas is yielded at the natural gas into solvent wellsite for downstream processing or sale.

Abstract: In accordance with the present invention, there are provided systems and methods for contacting two or more fluids, useful, for example for purifying or infusing a fluid (by allowing efficient and/or uniform addition of components to or removal of components from the fluid). The components may be undesirable components to be removed from a fluid, or a desired component or components to be added to the fluid, for example, each of which is referred to herein as “component”. In this regard, the disclosed embodiments provide for the purification or infusion of a fluid by passing a liquid and a fluid through a contacting zone which facilitates intimate mixing of the liquid and the fluid. A differential of partial pressure, activity, fugacity or concentration of the components between the liquid and the fluid facilitates the transfer of the components between the liquid and the fluid in the intimately mixed liquid and fluid.

Abstract: A fluid separation apparatus suitable for separating a mixed fluid with different properties and capable of separating a complex fluid mixture efficiently is provided. The fluid separation apparatus includes a sampling entrance, a first separation column, a second separation column, a bypass line, a detector and a guide multi-channel valve. A mixed fluid flows into the first separation column via the sampling entrance. The second separation column is connected to the first separation column in series and connected to the bypass line in parallel. The detector is connected to the second separation column and the bypass line. The guide multi-channel valve has different modes to control a flow-through status and a closed status between the first separation column and the second separation column, between the first separation column and the bypass line, between the second separation column and the detector, and between the bypass line and the detector.

Abstract: A system and process are disclosed for selective removal and recovery of H2S from a gaseous volume, e.g., from natural gas. Anhydrous organic, sorbents chemically capture H2S gas to form hydrosulfide salts. Regeneration of the capture solvent involves addition of an anti-solvent that releases the captured H2S gas from the capture sorbent. The capture sorbent and anti-solvent are reactivated for reuse, e.g., by simple distillation.

Abstract: To provide a gas mixture separation apparatus and a method which can reduce the energy consumption necessary to separate one type of gas, such as CO2, from a gas mixture, such as combustion exhaust gas or process gas, to reduce the operating cost of the apparatus. A gas mixture separation apparatus includes a gas hydrate formation part for hydrating one type of gas contained in a gas mixture containing a plurality of gas components to form a gas hydrate slurry, a dehydration part for dehydrating the gas hydrate slurry, and a gas hydrate decomposition part for decomposing and regasifying the gas hydrate obtained by the dehydration, and is characterized in that the water removed from the gas hydrate slurry in the dehydration part and the water generated when the gas hydrate is decomposed in the gas hydrate decomposition part are mixed together and the mixed water is introduced into the gas hydrate formation part as circulating water.

Abstract: A scrubber for removing contaminants from a gas stream, comprising a tank, a submerged head extending horizontally, wherein the submerged head comprises a plate having slots extending throughout, four solid joined vertical walls inset from the walls of the tank below the plate to form an open ended box under the plate, and openings along each edge of the plate between the walls of the tank and the vertical walls of the submerged head; a first baffle above the submerged head and means for spraying scrubbing fluid. The scrubber may comprise a flooded head extending horizontally above the first baffle and head having narrow slots extending throughout; and a second baffle extending horizontally between the four walls of the tank.

Abstract: A plant for producing an argon-rich stream from a mixture formed by a purge fluid in an ammonia production plant comprises: at least one phase separator; a methane scrubbing column; a methane separation column; a nitrogen/argon separation column; a line for sending the mixture into at least one phase separator, to produce at least a hydrogen-enriched gas and a hydrogen-depleted liquid; a line for sending at least a portion of the hydrogen-depleted liquid into the bottom of the methane scrubbing column, to form an overhead gas and a bottoms liquid; a line for sending at least a portion of the bottoms liquid from the methane scrubbing column to the methane separation column, to produce a methane-enriched bottoms liquid and a methane-depleted overhead gas; a line for sending at least a portion of the methane-depleted overhead gas to the nitrogen/argon separation column, to form a nitrogen-enriched fluid as overhead of said column; a line for withdrawing an argon-rich liquid as bottoms of said column, serving as

Abstract: A method for eliminating or substantially reducing emission of amines (amineslip) and alkaline degradation products to the atmosphere from a plant for CO2 capture from a flue gas, where the CO2 is captured by counter-current flow to an absorbent in an absorption zone, the absorbent comprising an aqueous solution of one or more amine(s), to give a CO2 lean flue gas that is released into the surroundings, and a CO2 rich absorbent that is regenerated in a regeneration column to give a CO2 rich gas that is treated further, and regenerated absorbent that is recycled to the absorption zone, wherein the CO2 lean flue gas is washed with an acidic aqueous solution to remove or substantially reduce the amount of amine(s) and alkaline degradation products thereof in the gas, is described.

Abstract: This invention relates to compounds useful as ionic liquids that are based on an N-substituted pyrrolidinone and incorporate a pendant ammonium cation that is spaced from the pyrrolidone ring by a variable length linker; and to methods of carbon dioxide removal in which they may be used.

Abstract: This invention relates to sulfur based compounds useful in methods of carbon dioxide or sulfur dioxide removal.

Abstract: This invention relates to a method and plant for energy-efficient removal of CO2 from a gas phase by means of absorption. The invention is particularly suitable for use in connection with thermal power plants fired by fossil fuels, and is also well-suited for retrofitting in existing thermal power plants. A processing plant according to the invention comprises three sections: a primary CO2-generating process that serves as main product supplier; a CO2-capture and separation plant based on absorption and desorption of CO2 respectively by/from at least one absorbent; and a second CO2-generating process where combustion of carbonaceous fuel in pure oxygen atmosphere serves as energy supply to at least a part of the thermal energy necessary to drive the regeneration of the absorbent in the desorption column(s).

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: An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

Abstract: A method and apparatus for separating gaseous emission pollutants from a scrubber by using a narrow band of UV light energy emitted from an LED light source. The method includes sweeping the evolved gas away from the flow of liquid containing the pollutant using a non-reactive gas. The pollutant can be CO2, NOx, SOx, or other pollutants. The method can operate on multiple pollutants the gas stream, using different banks of LEDs, specifically tuned for a certain pollutant.

Abstract: A gas processing facility for the separation of fluids is provided. The facility includes co-current contactors placed in series. Each co-current contactor receives a gas stream that includes a non-absorbing gas such as a hydrocarbon gas or nitrogen. The gas stream also includes an acid gas or other contaminant. Each co-current contactor also receives a liquid solvent stream. The co-current contactors then each release a sweetened gas stream and a gas-treating solution. In one processing direction, the contactors are arranged to deliver progressively sweetened gas streams. In the opposite processing direction, the contactors are arranged to deliver progressively richer gas-treating solutions. In one aspect, the facility includes at least a first co-current contactor, a second co-current contactor and a final co-current contactor. However, any number of at least two co-current separators may be employed. Methods and processes for separating a gas stream are also provided.

Abstract: A CO2 recovery system includes an absorption tower that removes CO2 from exhaust gas, a regeneration tower that regenerates a rich solution, and a separation drum that condensates steam in CO2 gas released from the regeneration tower and separates water. The CO2 recovery system further includes a filtration membrane apparatus that filters solid content remaining in the lean solution using a filter, and cleans the filter using condensed water as cleaning water and again return the condensed water into the system. The CO2-absorbing solution attached to the filter is collected and the filter is cleaned without diluting the CO2-absorbing solution upon replacement of the filter.

Abstract: A CO2 recovery apparatus according to the present invention includes: an absorber (1003) that brings CO2-containing flue gas (1001A) into counter-current contact with CO2 absorbent (1002) to reduce CO2, and a regenerator (1005) that regenerates rich solution (1004) that has absorbed CO2, in which lean solution (1006) having CO2 reduced in the regenerator (1005) is reused in the absorber (1003). The absorber (1003) further includes a CO2 absorbing unit (1010) that recovers CO2 contained in the flue gas (1001A), and the CO2 absorbent (1002) that has absorbed CO2 is extracted from a rich side of the CO2 absorbing unit (1010) to exterior, cooled, and then supplied to a position nearer to a lean side of the absorber (1003) with respect to the position at which the CO2 absorbent (1002) is extracted.

Abstract: A chilled ammonia based CO2 capture system and method is provided. A promoter is used to help accelerate certain capture reactions that occur substantially coincident to and/or as a result of contacting a chilled ammonia based ionic solution with a gas stream that contains CO2.