A fuel injector (10) has an inlet (12), an outlet (14), and a passageway (16) providing a fuel flow conduit from the inlet to the outlet. A valve structure (22, 24) is movable in the passageway between first and second positions. A seat (26) is provided at the outlet and has at least one seat passage (28) in communication with the passageway. Movement of the valve structure between the first and second positions controls the flow of fuel through the seat passages. The seat includes an outer tip surface (30) through which the least one seat passage extends. A catalytic coating (32) is provided on at least a portion of the outer tip surface. The coating causes oxidation of fuel on the coating to occur at a temperature lower than if the coating was not provided.

There is described a system and method for recycling carbon-containing material, in particular tires and plastics materials. The system includes a heating arrangement for anaerobically heating carbon containing material to produce carbon-containing gases. A condensing arrangement is also used to condense a proportion of the carbon-containing gases to provide condensed gases and non-condensed gases. In addition, a recirculating arrangement is provided for recirculating the non-condensed gases into the heating arrangement. Further systems and methods for pre- and post-processing of the carbon-containing material are also disclosed and products of the systems and methods are also described.

This invention relates to a system for obtaining hydrocarbons from organic or inorganic solid waste, wherein said system comprises: an inlet chamber, within which is a mixer assembly which mixes and conveys the waste through said chamber, which is also at ambient temperature, thus avoiding any thermal shock to the solid waste for processing; a dehydration chamber with a mixing assembly therein, and the upper part of this chamber contains an expansion chamber for promoting more efficient molecular breakdown; the thermal breakdown is carried out in two reactors which are operated at different temperatures, the first thermal disassociation reactor which has inside a mixer unit, and which in its upper part houses an expansion chamber, the second thermal breakdown reactor, therein has a mixer unit, and in the upper portion thereof houses an expansion chamber and at the top end thereof a vertical expansion tower; wherein the thermolytic steam is homogenized, a separator of heavy hydrocarbons, which does not require an additional cooling system, a multiple valve determines the temperature and oxygen content of the vapors and conveys them to the expansion tower in order to optimize the production of hydrocarbons, and to obtain a liquid hydrocarbon with high heating value.

A process for producing a renewable hydrocarbon fuel. The process can include providing a feed including a lignocellulosic material to a pyrolysis zone to produce a stream including a pyrolysis oil, providing the pyrolysis oil stream to a refining zone producing a refined stream, providing at least a portion of the refined stream to a reforming zone producing a stream including hydrogen, providing at least a portion of the hydrogen stream to the refining zone; and recovering the renewable hydrocarbon fuel from the refined stream.

Techniques, systems, apparatus and material are described for generating renewable energy from biomass waste while sequestering carbon. In one aspect, a method performed by a reactor to dissociate raw biomass waste into a renewable source energy or a carbon byproduct or both includes receiving the raw biomass waste that includes carbon, hydrogen and oxygen to be dissociated under an anaerobic reaction. Waste heat is recovered from an external heat source to heat the received raw biomass waste. The heated raw biomass waste is dissociated to produce the renewable fuel, carbon byproduct or both. The dissociating includes compacting the heated raw biomass waste, generating heat from an internal heat source, and applying the generated heat to the compacted biomass waste under pressure.

The method produces a hydrocarbonaceous fluid (a liquid mixture of hydrocarbons, or in other words a mixture of hydrocarbons which is liquid at ambient room temperature and atmospheric pressure), which functionally is a liquid hydrocarbon fuel, from a feed of waste plastic. The method can comprise the steps of: (step 1) melting a feed of substantially solid waste plastic in an aerobic atmosphere (for instance, air) whereby a waste-plastic melt is produced; (step 2) distilling at least a portion of the waste-plastic melt whereby a hydrocarbonaceous distillate is produced; and (step 3) collecting the hydrocarbonaceous distillate. That distillate is generally referred to above as a condensate. The method can include the step of comminuting the feed of substantially solid waste plastic into pieces substantially no greater than about 1.5 cm2 prior to step 1. The method can also include the step of adding an effective amount of a cracking catalyst to the waste plastic prior to step 2.

The invention relates to a method of manufacturing charcoal. It is characterized in that: first hot gases are generated by at least one heating means; its first gases are mixed with second gases in order to form a gas mixture; this mixture is sent into a charge of wood in order to generate therein a pyrolysis front; an overpressure is created between the upstream end and the downstream end of the charge so as to force this front to pass through it in one direction, namely from the upstream end to the downstream end; and third gases are recovered downstream of the charge, at least a first portion of said third gases, in the form of a stream of said second gases, is conveyed by a conveying means. The invention also relates to a device for implementing this method.

Techniques, systems, apparatus and material are disclosed for generating renewable energy from biomass waste while sequestering carbon. In one aspect, a method performed by a reactor to dissociate raw biomass waste into a renewable source energy or a carbon byproduct or both includes receiving the raw biomass waste that includes carbon, hydrogen and oxygen to be dissociated under an anaerobic reaction. Waste heat is recovered from an external heat source to heat the received raw biomass waste. The heated raw biomass waste is dissociated to produce the renewable fuel, carbon byproduct or both. The dissociating includes compacting the heated raw biomass waste, generating heat from an internal heat source, and applying the generated heat to the compacted biomass waste under pressure.

The present technology describes apparatus, systems, and methods for the thermal decomposition of carbonaceous feedstocks through continuous pyrolysis. A reciprocating reactor is described that includes an inner reactor pipe and an outer reactor pipe. The outer reactor pipe has a first portion that surrounds the inner reactor pipe forming an annulus space, and a second portion that extends beyond the inner reactor pipe and forms a turnaround zone. The inner reactor pipe defines an inner reactor zone that produces partially reacted carbonaceous feedstock, and the annulus space defines an outer reactor zone that produces product gases and solids.

A particulate form carbon pyrolyzate adsorbent, having the following characteristics: (a) CO2 capacity greater than 105 cc/gram at one bar pressure and temperature of 273° Kelvin; (b) CO2 Working Capacity greater than 7.0 weight percent; (c) CO2 heats of adsorption and desorption each of which is in a range of from 10 to 50 kJ/mole; and (d) a CO2/N2 Henry's Law Separation Factor greater than 5. The carbon pyrolyzate material can be formed from a polyvinylidene chloride-based polymer or copolymer, or other suitable resin material, to provide an adsorbent that is useful for carbon dioxide capture applications, e.g., in treatment of flue gases from coal-fired power generation plants.

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

A process for the reduction of carbon dioxide and carbonyl sulfide from various types of gas emitting sources containing carbon dioxide and/or gas or liquid emitting sources containing carbonyl sulfide, using ion exchange resin.

A system and method of reducing the net carbon dioxide footprint of an industrial process that generates power from the combustion of hydrocarbon fuels in which ambient air is admixed with up to 50% by volume of an effluent gas from the power generator of the industrial process, in order to substantially increase the CO2 concentration in the air prior to treatment. The treatment comprises adsorbing CO2 from the admixed ambient air utilizing a cooled, porous substrate-supported amine adsorbent, wherein the porous substrate initially contacts the mixed ambient air containing condensed water in its pores, which act as an intrinsic coolant with respect to the exothermic heat generated by the adsorption process. In addition, prior to regenerating the supported adsorbent, air pressure is substantially reduced in the sealed regeneration chamber and the low pressure chamber is placed in fluid connection with a higher pressure regeneration chamber containing steam and carbon dioxide, to preheat the sorbent to be regenerated and to quickly cool the regenerated sorbent prior to use for further CO2 adsorption.

A pressure swing adsorption process for removal of CO2 from natural gas streams through a combination of a selective adsorbent material containing an effective amount of a non-adsorbent filler, adsorbent contactor design, and adsorption cycle design. The removal of contaminants from gas streams, preferably natural gas streams, using rapid-cycle swing adsorption processes, such as rapid-cycle pressure swing adsorption (RC-PSA). Separations at high pressure with high product recovery and/or high product purity are provided through a combination of judicious choices of adsorbent material, gas-solid contactor, system configuration, and cycle designs. For example, cycle designs that include steps of purge and staged blow-down as well as the inclusion of a mesopore filler in the adsorbent material significantly improves product (e.g., methane) recovery. An RC-PSA product with less than 10 ppm H2S can be produced from a natural gas feed stream that contains less than 1 mole percent H2S.

The present invention relates to a process and apparatus for producing a fluid enriched in carbon dioxide starting from a waste gas from a ferrous metallurgy unit.

A composition of matter, and method to make same, for a nano-based material including a nanocarbon support to which is attached an aliphatic amine. In particular, the composition of matter is an aliphatic amine-nanocarbon material that includes a nanocarbon (NC) support, such as C60, nano-graphite, graphene, nanocarbon ribbons, graphite intercalation compounds, graphite oxide, nano-coal, nanohorns, and combinations thereof, and further includes an aliphatic amine, such as polyethyleneimine (PEI).

The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.

The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.

The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.

The invention relates to a method for precipitating calcium carbonate, in which method calcium hydroxide is introduced to a fiber suspension containing cellulose-containing fibers, the calcium hydroxide is allowed to attach onto the surfaces of fibers for a pre-determined time, and the aqueous suspension of calcium hydroxide and fibers is brought into contact with carbon dioxide for precipitating the calcium carbonate. The invention also relates to a corresponding system for precipitating calcium carbonate in connection with cellulose-containing fibers. In addition, the invention relates to a fibrous product, which comprises pulp material produced by said method and comprising calcium carbonate.

A solar collector includes a substrate having a top surface and a bottom surface opposite to the upper surface, a sidewall, a transparent cover, and a heat-absorbing layer. The sidewall is arranged on the periphery of the top surface of the substrate. The transparent cover is disposed on the sidewall opposite to the substrate to form a sealed chamber. The heat-absorbing layer is disposed on the upper surface of the substrate and includes a carbon nanotube film having a plurality of carbon nanotubes. The carbon nanotubes in the carbon nanotube film are joined end-to-end.

A method of making metal nanoparticles and carbon nanotubes is disclosed. A mixture of a transition metal compound and an aromatic polymer, a precursor of an aromatic polymer, or an aromatic monomer is heated to form a metal nanoparticle composition, optionally containing carbon nanotubes.

A process comprising receiving a hydrocarbon feed stream comprising carbon dioxide, separating the hydrocarbon feed stream into a light hydrocarbon stream and a heavy hydrocarbon stream, separating the light hydrocarbon stream into a carbon dioxide-rich stream and a carbon dioxide-lean stream, and feeding the carbon dioxide-lean stream into a hydrocarbon sweetening process, thereby increasing the processing capacity of the hydrocarbon sweetening process compared to the processing capacity of the hydrocarbon sweetening process when fed the hydrocarbon feed stream. Included is an apparatus comprising a first separation unit that receives a hydrocarbon feed stream containing carbon dioxide and produces a heavy hydrocarbon stream and a light hydrocarbon stream, and a second separation unit that receives the light hydrocarbon stream and produces a carbon dioxide-rich stream and a carbon dioxide-lean stream, wherein the apparatus is configured to feed the carbon dioxide-lean stream to a physical solvent, membrane, or carbon dioxide recovery process.

A system for separating contaminants from wellbore cuttings that includes a processing chamber, a heat source connected to the processing chamber adapted to vaporize hydrocarbons and other contaminants disposed on the material, a condenser operatively connected to an outlet of the process chamber and adapted to condense the vaporized hydrocarbons and other contaminants, and an ozone source operatively connected to the condenser.

Processing scheme and arrangement for increasing the relative yield of light olefins involves integration of the cracking a heavy hydrocarbon feedstock to produce an effluent comprising a range of hydrocarbon products including C4-C7 olefins and the subsequent cracking at least a portion of the C4-C7 olefins to produce additional light olefins.

A device for processing a hydrocarbon resource may include a hydrocarbon processing container configured to receive the hydrocarbon resource therein and having a pair of opposing ends with an enlarged width medial portion therebetween. The device may also a spirally wound electrical conductor surrounding the hydrocarbon processing container, and a radio frequency (RF) circuit coupled to the spirally wound electrical conductor and configured to supply RF power to the hydrocarbon resource while tracking a load resonance of the RF circuit. The RF circuit may be configured to generate magnetic fields within the hydrocarbon processing container parallel with an axis thereof.

The invention relates to a process for the purification of crude and apparatus for its implementation. This process comprises a separation into gas and degassed emulsion and separation of the degassed emulsion into water and oil. The invention also relates to a process of separating a hydrocarbon emulsion and apparatus for implementing this. This process comprises washing of the emulsion at an oil/water interface.

A device for processing a hydrocarbon resource may include a hydrocarbon processing container configured to receive the hydrocarbon resource therein and having a pair of opposing ends with an enlarged width medial portion therebetween. The device may also include a radio frequency (RF) source, and a first spirally wound electrical conductor surrounding the hydrocarbon processing container and coupled to the RF source. The device may further include a second spirally wound electrical conductor carried within the hydrocarbon processing container. The first spirally wound electrical conductor may be configured to generate magnetic fields with the hydrocarbon processing container that are parallel with an axis thereof.

A device for processing a hydrocarbon resource may include a hydrocarbon processing container configured to receive the hydrocarbon resource therein and having a pair of opposing ends with an enlarged width medial portion therebetween. The device may also include a radio frequency (RF) source, and a spirally wound electrical conductor surrounding the hydrocarbon processing container and coupled to the RF source. The spirally wound electrical conductor may be configured to generate magnetic fields within the hydrocarbon processing container that are parallel with an axis thereof.

Split-shell fractionation columns and associated processes for separating aromatic hydrocarbons. A split-shell fractionation column includes a housing shell having a first height and a partition having a second height and disposed within the housing shell. The partition includes first and second vertically oriented baffles separated by a gap region, a seal plate connecting top ends of the baffles, a first input port formed to extend through the partition for the introduction of a gas into the gap region, and a first output port formed to extend outwardly from a bottom of the gap region and through the housing shell. The partition defines a first distillation zone and a second distillation zone within the housing shell.

A system for treating recovered fluids in-line that includes a thermal reactor for separating contaminated drill cuttings into drill cuttings and contaminants by applying heat to the contaminated drill cuttings so as to vaporize contaminants from the contaminated drill cuttings; a first condenser in fluid connection with the thermal reactor for condensing the vaporized contaminants; a separator in fluid connection with the first condenser for separating the condensed vapors into an oleaginous liquid and an aqueous liquid, wherein at least a portion of one of the aqueous liquid and oleaginous liquid is fed back into the first condenser via a feedback line; and an ozone generator operatively coupled to the feedback line, wherein at least the portion of the fed back liquid is ozonated by the ozone generator and fed into the condenser is disclosed.

A method of extracting hydrocarbon-containing organic matter from a hydrocarbon-containing material includes the steps of providing a first liquid comprising a turpentine liquid; contacting the hydrocarbon-containing material with the turpentine liquid to form an extraction mixture; extracting the hydrocarbon material into the turpentine liquid; and separating the extracted hydrocarbon material from a residual material not extracted.

The present invention relates to a system and a method for the extraction of hydrocarbons from drill cuttings in drilling mud. The system for extracting hydrocarbons from drill cuttings includes at least one extraction tank, a carbon dioxide tank fluidly connected to the at least one extraction tank, and at least one separation tank in fluid communication with the at least one extraction tank. The method for extracting hydrocarbons from drill cuttings consists of exposing the drill cuttings to liquid carbon dioxide, solubilizing hydrocarbons from the drill cuttings with the liquid carbon dioxide, heating the liquid carbon dioxide and the soluble hydrocarbons to convert liquid carbon dioxide to carbon dioxide vapor, separating the hydrocarbons from the carbon dioxide vapor, and collecting the separated hydrocarbons.

A system and process for the preparation of high quality gasoline through recombination of catalytic hydrocarbon includes fractionator and extractor. The upper part of the fractionator is equipped with light petrol pipeline, the lower part of the fractionator is equipped with heavy petrol pipeline, the middle part of the fractionator is equipped with medium petrol pipeline. The medium petrol pipeline is connected with a medium petrol extractor, the upper part of the medium petrol extractor is connected with the medium petrol raffinate oil hydrogenation unit through the pipeline, the lower part of the medium petrol extractor is connected with the medium petrol aromatic hydrocarbon hydrogenation unit through the pipeline. The medium petrol aromatic hydrocarbon hydrogenation unit is then connected with the light petrol pipeline in the upper part of the fractionator through the pipeline, the lower part of the heavy petrol extractor is connected with the medium petrol aromatic hydrocarbon hydrogenation unit through the pipeline, the upper part of the heavy petrol extractor is connected with the medium petrol raffinate oil hydrogenation unit through the pipeline.

Systems and methods for extracting recoverable materials from source materials are provided. Source materials are introduced into a furnace. A condition is created within the furnace in which a gaseous pressure within the furnace is less than an atmospheric pressure outside of the furnace by removing air from within the furnace with a vacuum pump. Hydrocarbons contained within the source material are separated from the source material without using a significant amount of water by heating the source material to a temperature sufficient to cause the hydrocarbons to liquefy or vaporize. The liquefied hydrocarbons or vaporized hydrocarbons are then captured.

A system and process for integrated desulfurizing, desalting and deasphalting of hydrocarbon feedstocks is provided. A hydrocarbon feedstock, a water soluble oxidant, and a water soluble catalyst can be introduced in a oxidation zone and retained for a period of time sufficient to achieve the desired degree of desulfurization, or introduced directly into the desalting zone along with wash water. Catalyst and dissolved salt are discharged along with the wastewater effluent from the desalting zone. A hydrocarbon stream including converted hydrocarbons and oxidation by-products is passed to a deasphalting zone. In the deasphalting zone, phase separation occurs, whereby a light phase including desulfurized hydrocarbons are produced, and a heavy phase including asphaltenes and oxidation by-products are discharged, e.g., passed to an asphalt pool.

The invention concerns copper azide containing carbon nanotubes. The invention also concerns methods of producing such nanotubes by placing CuO nanoparticles within carbon nanotubes to produce CuO-containing carbon nanotubes, contacting CuO-containing carbon nanotubes with hydrogen to produce reduced nanotubes; and contacting the reduced nanotubes with hydrazoic acid to produce copper azide containing carbon nanotubes.

Reduced toxicity fuels containing hydrocarbons having both strained rings and internal, conjugated triple bonds are disclosed. The fuels described herein are hypergolic with nitrogen tetroxide and/or inhibited red fuming nitric acid.

A gas generating pyrotechnic composition that in addition to a primary fuel component and a primary oxidizer component includes critical relative amounts of elemental carbon and cupric oxide. Also provided are associated methods for producing an inflation gas for an occupant restraint system of a motor vehicle.

The present invention provides apparatus and methods for growing fullerene nanotube forests, and forming nanotube films, threads and composite structures therefrom. In some embodiments, an interior-flow substrate includes a porous surface and one or more interior passages that provide reactant gas to an interior portion of a densely packed nanotube forest as it is growing. In some embodiments, a continuous-growth furnace is provided that includes an access port for removing nanotube forests without cooling the furnace substantially. In other embodiments, a nanotube film can be pulled from the nanotube forest without removing the forest from the furnace. A nanotube film loom is described. An apparatus for building layers of nanotube films on a continuous web is described.

A carbon oxygen hydrogen motor comprises an enclosure, a combustion chamber, and a plurality of injectors. A rotational crank is positioned within the enclosure and connected with a piston. The piston is positioned within the combustion chamber and connected to the rotational crank by a rod. A stream of hydrogen gas, oxygen gas, and carbon dioxide gas enter into the combustion chamber through the plurality of injectors. A spark plug, which is connected to the combustion chamber, ignites hydrogen gas, oxygen gas, and carbon dioxide gas inside the combustion chamber causing a reaction. The reaction moves the piston upward. After the reaction has taken place, the piston moves downward. The downward motion of the piston ejects all of the byproducts from the reaction through a ejecting valve located in the combustion chamber. Since the piston is connected with the rotational crank, the rotational crank rotates in cycles creating mechanical energy.

A carbon material for a non-aqueous secondary battery containing a graphite capable of occluding and releasing lithium ions, and having a cumulative pore volume at pore diameters in a range of 0.01 μm to 1 μm of 0.08 mL/g or more, a roundness, as determined by flow-type particle image analysis, of 0.88 or greater, and a pore diameter to particle diameter ratio (PD/d50 (%)) of 1.8 or less, the ratio being given by equation (1A): PD/d50 (%)=mode pore diameter (PD) in a pore diameter range of 0.01 μm to 1 μm in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100 is provided.

Disclosed is an anode for a molten carbonate fuel cell (MCFC) having improved creep property by adding an additive for imparting creep resistance to nickel-aluminum alloy and nickel as materials for an anode. Improved sintering property, creep property and increased mechanical strength of a molten carbonate fuel cell may be obtained accordingly.

A battery electrolyte solution contains a lithium salt dissolved in a solvent phase comprising at least 10% by weight of methyl (2,2,3,3-tetrafluoropropyl) carbonate. The solvent phase comprises optionally other solvent materials such as 4-fluoroethylene carbonate and other carbonate solvents. This battery electrolyte is highly stable even when used in batteries in which the cathode material has a high operating potential (such as 4.5V or more) relative to Li/Li+. Batteries containing this electrolyte solution therefore have excellent cycling stability.

A battery electrolyte solution contains a lithium salt dissolved in a solvent phase comprising at least 10% by weight of ethyl (2,2,3,3-tetrafluoropropyl) carbonate. The solvent phase comprises optionally other solvent materials such as 4-fluoroethylene carbonate and either or both of diethyl carbonate and ethyl methyl carbonate. This battery electrolyte is highly stable even when used in batteries in which the cathode material has a high operating potential (such as 4.5V or more) relative to Li/Li+. Batteries containing this electrolyte solution therefore have excellent cycling stability.

A battery electrolyte solution contains a lithium salt dissolved in a solvent phase comprising at least 10% by weight N of (2,2-difluoroethyl) ethyl carbonate. The solvent phase comprises optionally other solvent materials such as 4-fluoroethylene carbonate and other carbonate solvents. This battery electrolyte is highly stable even when used in batteries in which the cathode material has a high operating potential (such as 4.5V or more) relative to Li/Li+. Batteries containing this electrolyte solution therefore have excellent cycling stability.

A hydrocarbon sequestering product, a method to obtain the product, and a method and a facility to sequester hydrocarbons, wherein the product comprises an oleophilic filamentous material that gets in contact with a medium contaminated by one or more hydrocarbons with the purpose of sequestrating the hydrocarbon(s) present in the medium to free it from said hydrocarbons.

An apparatus for making a carbon nanotube yarn includes a tube and a bobbin. The tube has an opening capable of introducing organic solvent into the tube. The tube further has an inlet and an outlet defined through lateral walls thereof. The inlet is capable of accepting one or more carbon nanotube yarn strings and the outlet is capable of accepting the carbon nanotube yarn. The bobbin is positioned around the tube for collecting the carbon nanotube yarn as it comes out of the outlet.

A pressure steam treatment apparatus according to the invention includes a pressure steam treatment chamber and labyrinth sealing chambers. The labyrinth sealing chambers are respectively arranged on a fiber bundle inlet and on a fiber bundle outlet of the steam treatment apparatus, having a running path of the fiber bundle in a horizontal direction and having plural labyrinth nozzles on top and bottom of the running path. The difference between a maximum value and a minimum value of the distance in the perpendicular direction of the top and bottom side labyrinth nozzles, of a pair of opposing labyrinth nozzles is 0.5 mm or smaller when the ambient temperature of the labyrinth sealing chamber is 140° C. This structure ensures that the energy cost can be reduced, the deformation of the apparatus and also, the raise of fuzz on the fiber bundle and fiber bundle breakage can be prevented at the same time.

A method for separating carbon dioxide from a gas stream, in particular from a flue gas stream, wherein, a gas stream is brought into contact with a washing medium in an absorber of a separation device and the carbon dioxide contained in the gas stream is separated; the charged washing medium is supplied to a desorber of the separation device to release the carbon dioxide; a vapor stream is removed from the desorber and is supplied to a cooling unit to form a condensate; degradation products, in particular nitrosamines, contained in at least a partial stream of the condensate are photolytically decomposed to decomposition products; at least the decomposition products, in particular nitrites and amines, are removed; and at least a partial stream of the condensate is returned to the desorber. A corresponding separation device separates carbon dioxide from a gas stream.