Abstract: The invention described herein relates to a novel process for reducing the carbon dioxide emissions from a coal and/or biomass liquefaction facility by utilizing a steam methane reformer unit in the complex designed to produce additional hydrogen which can be thereafter utilized in the process, as required for the plant fired heaters (including the SMR furnace), and for the production of plant steam. The plant light ends (C1, C2, etc.), which are normally utilized as fuel gas streams are the primary feeds to the SMR Unit along with the tail gas purge from a gasification complex within the facility.

Abstract: The present invention relates to a single crystal silicon ingot or wafer wherein the lateral incorporation effect of intrinsic point defects has been manipulated such that the formation of agglomerated intrinsic point defects and/or oxygen precipitate clusters in a ring extending radially inward from about the lateral surface of the ingot segment is limited.

Abstract: The system for reducing environmental pollutants according to the present invention comprises: a first water immersion tank for producing strongly alkaline water by receiving a supply of bottom ash, which has been created by and has been accumulated at the bottom of a combustion furnace, and reacting it with water accommodated on its inside; an elimination reaction tank which is provided on a combustion pathway extending from the combustion furnace, and which internally accommodates the strongly alkaline water supplied from the first water immersion tank, and which also eliminates carbon-based compounds contained in exhaust gases which are discharged through the combustion pathway; a sludge-storage tank for receiving and storing sludge which has been produced as a consequence of the elimination reaction within the elimination reaction tank; a first aggregate storage tank for receiving and storing bottom-ash aggregate remaining within the first water immersion tank after the neutralization which follows as a c

Abstract: The invention relates to an apparatus and method for reducing contaminants from industrial processes. More particularly, the invention is directed to a method of sequestering pollutants from flue gases in operational plants. The method includes sequestering contaminants from a point source by reacting an alkaline material with a flue gas containing contaminants to be sequestered, wherein the reaction has a rapid mass transfer rate to sequester at least a portion of the contaminants.

Abstract: SOx removal equipment for reducing sulfur oxides from flue gas from a boiler, a cooler which is provided on the downstream side of the SOx removal equipment, for reducing the sulfur oxides from the flue gas and for decreasing a gas temperature, CO2 recovery equipment which includes an absorber for bringing CO2 in the flue gas into contact with a CO2 absorption liquid so as to be reduced and a regenerator for causing the CO2 absorption liquid to emit CO2 so as to recover CO2 and regenerate the CO2 absorption liquid, and dissolved salt spraying equipment for reducing a mist generation material which is a generation source of mist that is generated in the absorber of the CO2 recovery equipment before introducing the flue gas to the CO2 recovery equipment, are included.

Abstract: The invention relates to a method for recovering sulphur from a sour gas containing hydrogen sulphide and carbon dioxide, comprising: oxidation of the sour gas, wherein a part of the hydrogen sulphide is oxidized to sulphur dioxide and water, reaction of the resulting sulphur dioxide with the residual hydrogen sulphide to elementary sulphur, and removal of elementary sulphur. According to the invention carbon dioxide and/or carbon dioxide generated by oxidation of the sour gas is compressed, and at least a part of the carbon dioxide is injected into an oil well. Furthermore, the invention relates to a plant suitable for performing the above method.

Abstract: A flue-gas purification system includes a flue-gas cycling system, a reactor, and an absorbent adding system having at least a catalytic absorbent, wherein the catalytic absorbent is being gasified for reacting with the flue-gas in the reactor in a homogenous gas-gas phase reacting manner. Therefore, the purification system has fast reaction rate between the pollutants of the flue-gas and the catalytic absorbent, which is preferably ammonia, to efficiently remove pollutants, so as to effectively purify the flue-gas.

Abstract: A system and method for removing contaminants from a gas stream is provided. The method can include the steps of reacting the gas stream with ozone to form solid contaminant particles and separating the solid contaminant particles from the gas stream. The solid contaminant particles can he separated from the gas stream using an adsorption material.

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: An improved process for reduction-oxidation desulphurization uses an oxidizer operating at a pressure greater than the absorber where a liquid reduction-oxidation catalyst solution contacts a sulfur-containing gas feed stream.

Abstract: A process for removing sulfur from a gas stream is provided in which a plurality of reactor units, each comprising a condenser and reactor, are selectively operable under Claus reaction and cold bed adsorption conditions. The arrangement of reactor units within the plant is periodically changed following a front-middle-back sequencing scheme. This ensures that the final reactor unit in the series utilizes fully cooled catalyst which is most efficient for operation under cold bed adsorption conditions. In addition, the condenser of the final reactor unit in the series operates at or below the freezing point of sulfur thereby permitting even greater sulfur recovery.

Abstract: Disclosed embodiments include methods of removing carbon dioxide from combustion gas from an engine of a vehicle, systems for removing carbon dioxide from combustion gas from an engine of a vehicle, vehicles, methods of managing carbon dioxide emissions from an engine of a vehicle, and computer software program products for managing carbon dioxide emissions from an engine of a vehicle.

Abstract: A method for recovering carbon dioxide (CO2) from a gas stream is disclosed. The method includes the step of reacting CO2 in the gas stream with fine droplets of a liquid absorbent, so as to form a solid material in which the CO2 is bound. The solid material is then transported to a desorption site, where it is heated, to release substantially pure CO2 gas. The CO2 gas can then be collected and used or transported in any desired way. A related apparatus for recovering carbon dioxide (CO2) from a gas stream is also described herein.

Abstract: Systems and methods of removing sulfur from a gas stream comprising hydrogen sulfide (H2S) is provided. The systems and methods may utilize iodine to remove sulfur from the gas stream. In certain systems and methods, the iodine may be regenerated. In particular, the present systems and methods may be capable of reducing sulfur content in a gas stream comprising hydrogen sulfide H2S gas to levels that are undetectable.

Abstract: A method and a plant for capturing CO2 from an exhaust gas from combustion of carbonaceous material are described. At least a part of the combustion gas is introduced into a biol fuel boiler as an oxygen containing gas, to increase the concentration of CO2 and decrease the oxygen concentration in the gas before introduction into an absorption column for separation of CO2.

Abstract: Gas sweetening solutions are described that are capable of removing hydrogen sulfide from gas streams. These gas sweetening solutions increase the size of produced sulfur particles and thereby improve efficiency of their separation, while simultaneously reducing corrosive effects of the sweetening solutions. The gas sweetening solutions comprise at least one chelating agent, cationic iron and a mixture of nitrite salt and phosphate species.

Abstract: This invention relates to a method and apparatus for treating a flue gas stream containing oxygen containing greenhouse gases. In particular, the method comprises reacting a flue gas steam with a molten aluminum or aluminum alloy bath, creating alumina and elemental carbon, elemental sulfur, and molecular nitrogen. The apparatus includes a reaction vessel for carrying out the reaction, as well as other equipment necessary for capturing and removing the reaction products. Further, the process can be used to cogenerate electricity using the excess heat generated by the process.

Abstract: A method and system for recovering CO2 from gasification gas, prevents the recovered CO2 from being contaminated with COS, without repeating cooling and heating operations and without increasing the steam consumption. Gasification gas being produced in a gasifier 10 and containing CO, CO2, COS and H2S is subjected to dust removal in a scrubber 20. Then, a part of the gas is subjected to a CO shift reaction, in which CO is converted into CO2, in a CO shift reactor 30. Another part of the gasification gas is not subjected to the CO shift reaction by means of a bypass 34, and is mixed with the gas after the CO shift reaction. Thereby, the temperature of the mixture gas is set at 180° C. to 300° C., and COS in the mixture gas is converted into H2S in a COS converter 40.

Abstract: A system is arranged to remove carbon dioxide (CO2) from a gas stream by bringing the gas stream into contact with a circulating ammoniated solution stream such that CO2 is removed from the gas stream by the ammoniated solution stream. A method of removing non-volatile compounds from the circulating ammoniated solution stream includes: introducing a portion of the circulating ammoniated solution stream into a gas-liquid separating device; and separating the introduced ammoniated solution into an ammonia rich gas phase and a liquid phase comprising the non-volatile compounds; and reintroducing the ammonia rich gas phase into the circulating ammoniated solution stream.

Abstract: A system for collecting carbon dioxide in flue gas includes a stack that discharges flue gas discharged from an industrial facility to outside, a blower that is installed at the downstream side of the stack and draws the flue gas therein, a carbon-dioxide collecting device that collects carbon dioxide in the flue gas drawn in by the blower, and a gas flow sensor arranged near an exit side within the stack. A drawing amount of the flue gas by the blower to the carbon-dioxide collecting device is increased until an flow rate of the flue gas from the stack becomes zero in the gas flow sensor, and when the discharged amount of flue gas from the stack becomes zero, drawing in any more than that amount is stopped, and the carbon dioxide in the flue gas is collected while the flue gas is drawn in by a substantially constant amount.

Abstract: The disclosure utilizes a hydroxide sorbent for humidification and CO2 removal from a gaseous stream comprised of CO and CO2 prior to entry into a water-gas-shift reactor, in order to decrease CO2 concentration and increase H2O concentration and shift the water-gas shift reaction toward the forward reaction products CO2 and H2. The hydroxide sorbent may be utilized for absorption of CO2 exiting the water-gas shift reactor, producing an enriched H2 stream. The disclosure further provides for regeneration of the hydroxide sorbent at temperature approximating water-gas shift conditions, and for utilizing H2O product liberated as a result of the CO2 absorption.

Abstract: An apparatus and method to clean flue gases. As shown in FIG. 1, a condenser 10 is provided having two packed beds (20/26) and two condensate loops. The condensate loops are configured such that anti-corrosive agent (40/41) may injected. Corrosives are removed from flue gases as condensate containing anti-corrosive agents passes over the flue gases.

Abstract: According to one embodiment, a carbon dioxide recovery device includes an absorption tower configured to cause carbon dioxide-containing gas to come in contact with absorbing solution and to generate rich solution absorbing the carbon dioxide, a regeneration tower configured to heat the rich solution, to disperse steam containing the carbon dioxide, and to generate lean solution from which the carbon dioxide is removed, a heat exchanging device configured to exchange heat between the lean solution and the rich solution, to supply the rich solution after the heat exchange to the regeneration tower, and to supply the lean solution after the heat exchange to the absorption tower, and a cooling device configured to cool a part of the rich solution discharged from a first place of the absorption tower and to supply the cooled rich solution to a second place higher than the first place of the absorption tower.

Abstract: In one embodiment, a carbon dioxide capturing system includes an absorption tower to bring a gas containing carbon dioxide into contact with an absorbing liquid to discharge the absorbing liquid which has absorbed the carbon dioxide and discharge the gas whose carbon dioxide concentration is reduced. The system includes a regeneration tower to release the carbon dioxide from the absorbing liquid to discharge the absorbing liquid whose carbon dioxide concentration is reduced and discharge a gas containing the carbon dioxide. The system includes a first absorbing liquid component washing apparatus to cool the gas which is discharged from the absorption or regeneration tower and has passed through an absorption or regeneration tower condenser to condense or sublime an absorbing liquid component in the gas and remove a liquid or solid product generated by the condensation or sublimation of the absorbing liquid component by using a washing liquid.

Abstract: A process for removing CO2 from a CO2 containing gas stream in which the CO2 containing gas stream is contacted with an aqueous ammonium solution. The aqueous ammonia solution comprises 0.1-40% w/v, v/v/w/w ammonia, and a soluble salt at a concentration range of 0.01%-10% wt or v/v or w/v, the soluble salt having cations selected from the group of group IA, IIA, IIIA and IVA metals with counter anions selected from the group of anion of group VIIA elements, NO3?, SO42?, OH?, PO43? and HCO3?. The invention also extends to a CO2 capture solvent comprising an aqueous ammonia solution and the above soluble salt.

Abstract: The invention relates to a plant and a process for the looping-type combustion of solid carbon-containing fuels with a carbon dioxide (CO2) flow output. Said process carries out the conversion of carbon without the help of solid carriers of the MyOx type, or of sulphate/sulphide type, and comprises the steps of: (i) Oxidation, wherein the carbon-containing solids are contacted with a gaseous flow comprising oxygen, for a time period and at a temperature sufficient to allow formation of a surface oxidized complex; (ii) Desorption, wherein the surface oxidized complexes generated by adsorption of oxygen in item (i) are released in a gaseous form by decomposition in the absence of O2.

Abstract: CO2-sequestering formed building materials are provided. The building materials of the invention include a composition comprising a carbonate/bicarbonate component. Additional aspects of the invention include methods of making and using the CO2-sequestering formed building material.

Abstract: A CO2 recovery system includes an absorption tower and a regeneration tower. CO2 rich solution is produced in the absorption tower by absorbing CO2 from CO2-containing gas. The CO2 rich solution is conveyed to the regeneration tower where lean solution is produced from the rich solution by removing CO2. A regeneration heater heats lean solution that accumulates near a bottom portion of the regeneration tower with saturated steam thereby producing steam condensate from the saturated steam. A steam-condensate heat exchanger heats the rich solution conveyed from the absorption tower to the regeneration tower with the steam condensate.

Abstract: A functional fluid for the removal of contaminates such as but not limited to, acid causing components in gas, sulfur components and carbon oxides from fluid streams, and removal and treatment of NOX & SOX from post combustion emissions. Also described is the manufacturing process to produce the functional fluid both in a batch atmospheric process system as well as a closed system capable of operating at above or below atmospheric conditions.

Abstract: The invention relates to the use of a liquid, containing 0.1 to 100% of an amine or several amines of formula H2N—CH2(CHR2)x—(OCH2(CHR3)y)z—OR1, where R1=C1 to C6 alkyl, R2=H or CH3, R3=H or CH3, x=0 to 3, y=0 to 3, z=0 to 10 and 0 to 99.9% of any further solvent including piperazine and/or water for separating acid gas components from technical gases.

Abstract: A method and apparatus for processing a sour gas rich in carbon dioxide in a Claus process, so sulfur compounds are removed by a selective solvent in a gas scrubbing process. Sulfur components and carbon dioxide, are separated into at least two sour gas fractions, wherein at least one sour gas fraction having a higher content of sulfur components is obtained, wherein the fraction having the highest hydrogen sulfide content is introduced in the thermal reaction stage of the Claus furnace with a gas containing oxygen by means of a burner. The sulfur is converted to sulfur dioxide in the thermal reaction stage of the Claus furnace and exhaust gases are discharged into the closed Claus reaction chamber behind the burner. The remaining sour gas fractions stripped of sulfur components are fed to the Claus reaction chamber and are mixed with the combustion gases leaving the burner.

Abstract: An energy-efficient method of recovering carbon dioxide (CO2) in a high-pressure liquid state from a high-pressure gas stream. The method includes cooling, condensing, and/or separating CO2 from a high-pressure gas stream in two or more separation zones and further purifying the resulting sub-critical pressure liquid CO2 streams in a third purification zone to thereby provide purified CO2. The purified liquid CO2 may be pumped to above the critical pressure for further utilization and/or sequestration for industrial or environmental purposes.

Abstract: A single step process for degrading plastic waste by converting the plastic waste into carbonaceous products via thermal decomposition of the plastic waste by placing the plastic waste into a reactor, heating the plastic waste under an inert or air atmosphere until the temperature of about 700° C. is achieved, allowing the reactor to cool down, and recovering the resulting decomposition products therefrom. The decomposition products that this process yields are carbonaceous materials, and more specifically carbon nanotubes having a partially filled core (encapsulated) adjacent to one end of the nanotube. Additionally, in the presence of a transition metal compound, this thermal decomposition process produces multi-walled carbon nanotubes.

Abstract: The present invention describes a reactor (1) for continuously preparing hydrogen sulfide H2S from hydrogen and sulfur, comprising a distributor device (15) for distributing gaseous hydrogen in a sulfur melt (9) present at least in a lower part of the reactor. The distributor device (15) is arranged in the sulfur melt (9) and comprises a distributor plate (16) which is arranged in the reactor (1) and has an edge (17) extending downward and, if appropriate, has passage orifices (19). The hydrogen from a hydrogen bubble which forms below the distributor plate (16) is (for example through the passage orifices (19)) distributed in the sulfur melt (9) via the distributor plate (16).

Abstract: One aspect of the present invention relates to salts that are room-temperature ionic liquids (RTILs), methods of making them, and methods of using them in connection with temporary or permanent gas sequestration. Another aspect of the present invention relates to a class of solvents which can be transformed into RTILs by exposure to a gas, and methods of using them in connection with temporary or permanent gas sequestration.

Abstract: A process for workup of an industrial carbon dioxide-rich gas to be freed of sulfur components, in which an industrial gas to be freed of sulfur components is purified by a gas scrubbing, and the laden solvent is freed of carbon dioxide and hydrogen sulfide by a regeneration to obtain at least one acid gas fraction having a relatively high content of sulfur components, and the fraction with the highest hydrogen sulfide (H2S) content is supplied to a Claus plant with downstream Claus process gas hydrogenation, and at least one carbon dioxide-laden, low-hydrogen sulfide acid gas fraction from the regeneration device, which has a reduced sulfur content compared to the fraction with the highest hydrogen sulfide (H2S) content, is combined with the hydrogenated Claus process gas to give a combined process gas stream, which is supplied to further processing or to recycling into the process.

Abstract: An oxyfuel combustion boiler plant having a first boiler and a second boiler for injecting gas including oxygen in higher concentration than that in the air, gas including carbon dioxide in higher concentration than that in the air, and fuel from a burner and generating steam by combustion gas in a furnace, respectively, comprising: an exhaust gas supply pipe for supplying exhaust gas discharged from the first boiler to a burner of the second boiler, and a gas flow rate control apparatus for controlling a flow rate of exhaust gas flowing through the exhaust gas supply pipe.

Abstract: A method and corresponding apparatus for separation of carbon dioxide from an exhaust gas of a fossil-fired power are provided. In an absorption process, the exhaust gas containing carbon dioxide is brought into contact with an absorption medium so that the absorption medium is laden with carbon dioxide. In a desorption process, vapor from a water/steam circuit of the fossil-fired power plant is heated, wherein a laden absorption medium is regenerated. In a subsequent expansion process, the regenerated absorption medium is expanded so that a vapor and an expanded absorption medium are formed, wherein the vapor is recirculated into the desorption process. The laden absorption medium is divided into a first part stream and a second part stream. Only the second part stream is brought into heat-exchanging contact with the expanded absorption medium. The first and second part streams are supplied to the desorption process at different process stages.

Abstract: A system for removing components of a gaseous mixture is provided comprising: a reactor fluid containing vessel having conduits extending therefrom, aqueous fluid within the reactor, the fluid containing a ligand and a metal, and at least one reactive surface within the vessel coupled to a power source. A method for removing a component from a gaseous mixture is provided comprising exposing the gaseous mixture to a fluid containing a ligand and a reactive metal, the exposing chemically binding the component of the gaseous mixture to the ligand. A method of capturing a component of a gaseous mixture is provided comprising: exposing the gaseous mixture to a fluid containing a ligand and a reactive metal, the exposing chemically binding the component of the gaseous mixture to the ligand, altering the oxidation state of the metal, the altering unbinding the component from the ligand, and capturing the component.

Abstract: A method for making a syngas mixture is accomplished by introducing a gaseous feed mixture containing carbon dioxide and hydrogen into a reactor containing a non-zinc catalyst. The catalyst contacts the gaseous feed mixture to form syngas mixture reaction products. The reaction takes place in the presence of nickel-containing and/or iron-containing materials. The gaseous feed mixture is introduced into the reactor at a reactor inlet temperature of from 700° C. to 800° C., with the reaction being carried out at substantially adiabatic conditions or wherein the syngas mixture reaction products are removed from the reactor at a reactor outlet temperature of from 500° C. to 600° C.

Abstract: 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.

Abstract: Apparatus for the production of carbon dioxide from limestone includes a nuclear reactor (10) for generating heat and a rotary kiln (12). The rotary kiln (12) has an inlet (28) for the introduction of limestone and an outlet (30) for the release of carbon dioxide. A heat transfer arrangement is provided for transferring heat from the nuclear reactor (10) to the interior of the rotary kiln (12). The heat transfer arrangement includes feed and return primary conduits (17,18) for passing a heat transfer fluid (14) through the nuclear reactor (10) so that heat may be extracted from the nuclear reactor (10) for transfer to the interior of the rotary kiln (12). Limestone in the rotary kiln (12) is thereby heated to a temperature sufficient for the release of carbon dioxide.

Abstract: A system for treating a flue gas from a combustion process comprises an absorber vessel configured to receive an aqueous ammonia solvent stream lean in CO2 and a flue gas stream having CO2, the aqueous ammonia solvent stream and the flue gas stream in contact in the absorber vessel in a counter-current arrangement to provide an outlet stream rich in CO2; a desorber configured to strip the CO2 from the outlet stream rich in CO2 from the absorber vessel at a temperature less than 100 degrees C. and to return the resultant aqueous ammonia solvent stream lean in CO2 to the absorber vessel; a source of heat configured to supply heat to the desorber; and a CO2 sequestration system for sequestering CO2 stripped by the desorber.

Abstract: A method and a system for controlling solvent emissions from a carbon capture unit includes passing solvent through a CO2 absorber and a flue gas effluent stream through the CO2 absorber and in a counter-current direction to the solvent passing through the CO2 absorber. Subsequently, a gas-phase effluent stream from the CO2 absorber is passed through an acid wash and the water wash to reduce an emission of solvent within a gas-phase effluent stream from the acid wash and a gas-phase effluent stream from the water wash. A control logic unit receives and processes a signal from a gas-phase analyzer and a pH sensor and passes a stream of acid wash and acid to the acid wash, and a stream of water wash to the water wash, via respective control valves.

Abstract: A CO2 recovery apparatus includes a desulfurization tower which includes a desulfurization unit and a cooling unit, an absorption tower which includes a CO2 absorption unit and an acid washing unit, a regeneration tower, and an acid water production device configured to produce acid water by causing exhaust gas yet to be introduced into the desulfurization to come into contact with water. In the CO2 recovery apparatus, the water to be come in contact with the exhaust gas is condensed water that is generated in the desulfurization tower, the absorption tower, or the regeneration tower.

Abstract: The carbon dioxide adsorbent composition relates to a material that will adsorb carbon dioxide gas from the atmosphere and that is made by the treatment of oil fly ash with ammonium hydroxide. In order to make the carbon dioxide adsorbent, oil fly ash is first mixed with ammonium hydroxide. This mixture is then refluxed and cooled. Additional ammonium hydroxide is added to the cooled mixture of oil fly ash and ammonium hydroxide to form a secondary mixture. This forms an amine-functionalized fly ash composition, which is then filtered from the secondary mixture to be used as a carbon dioxide adsorbent composition. The carbon dioxide adsorbent composition is then dried and may be used as a carbon dioxide adsorbent for gas streams, such as flues and exhaust systems, containing carbon dioxide.

Abstract: A method and apparatus is provided for cleaning flue gases from combustion plants. The method includes removing dust and removing nitrogen from flue gases, bringing flue gases into contact with an aqueous ammonia solution in the presence of an oxidizing agent whereby a reaction solution forms which contains at least ammonium carbonate, heating the reaction solution such that ammonium carbonate decomposes and carbon dioxide and ammonia transfer into the gas atmosphere, and reacting the gaseous carbon dioxide and the gaseous ammonia to form urea. The apparatus includes a device for removing nitrogen and removing dust from the flue gases, a washing device downstream of the device for removing nitrogen and removing dust, a stripper downstream of the washing device, and a urea installation downstream of the stripper.

Abstract: The present invention concerns carbon dioxide capture from waste gas, where metal oxides dissolved in salt melts are used as absorbents.

Abstract: A reactor for adsorbing CO2 from a fluid stream includes a reactor housing having a fluid inlet and a fluid outlet. The reactor also includes an inlet ceramic honeycomb structure and an outlet ceramic honeycomb structure positioned inside the reactor housing. The inlet and outlet ceramic honeycomb structures have a plurality of partition walls extending in an axial direction thereby forming a plurality of flow channels and comprises a material that forms bonds with CO2 to adsorb the CO2. The inlet ceramic honeycomb structure is capable of adsorbing an inlet quantity of CO2 and the outlet ceramic honeycomb structure is capable of adsorbing an outlet quantity of CO2. The inlet quantity of CO2 is greater than the outlet quantity of CO2.

Abstract: The present invention relates to a method for combined SO2 and CO2 removal from flue gas, which includes removing both CO2 and SO2 in a primary fractionation column and two polishing columns, the method comprising: a) hot flue as pretreatment, including flue gas SO3 removal by dry sorbent injection; b) compressing the treated hot flue gas by a multi-stage compressor; c) separation of CO2, SO2 and non-condensable gases; d) subjecting the CO2 and SO2 to separate polishing columns; and e) combining streams from the primary fractionation column and the two polishing columns for power recovery.