Abstract: The present invention relates to a method of pressurizing a fluid comprising carbon dioxide, the method includes: obtaining the fluid from a unit for removing carbon dioxide from a process gas; compressing the fluid to a pressure above the critical pressure of carbon dioxide; and cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid. The invention further relates to an apparatus for pressurizing a fluid comprising carbon dioxide, the apparatus including: means for obtaining the fluid from a unit for removing carbon dioxide from a process gas; means for compressing the fluid to a pressure above the critical pressure of carbon dioxide; and means for cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid.

Abstract: The present invention relates to a cement manufacturing plant includes a system for capturing carbon dioxide (CO2) from an exhaust gas stream generated in the kiln 110 of the cement manufacturing plant by using regenerative calcium cycle (RCC) into the cement manufacturing process. Also, the invention relates to a method of capturing carbon dioxide CO2 from a carbon dioxide CO2 rich exhaust gas stream generated in a cement kiln, wherein the method includes recirculation of the carbon dioxide CO2 rich exhaust gas stream to a unit for carbonization.

Abstract: The present invention relates to a method of cleaning a carbon dioxide rich flue gas stream containing oxygen. The method includes heating the flue gas stream to a temperature suitable for selective catalytic reduction (SCR) of NOX; and reducing at least some of the NOX in the heated flue gas stream to N2 by SCR. Heating of the flue gas stream includes removal of residual oxygen contained in the flue gas by catalytic oxidation of a suitable carburant. The present invention further relates to a gas processing unit.

Abstract: The present invention relates to a flue gas treatment system for removing CO2 from a flue gas stream wherein the system includes a flue gas compressor, at least one flue gas adsorption drier, a refrigeration system and a stripper column allowing distillation. Also a method for condensation of carbon dioxide (CO2) in a flue gas stream including a step of separation by distillation of the condensed CO2 is provided by the invention.

Abstract: A method of treating a carbon dioxide rich flue gas and a flue gas treatment system for treatment of a carbon dioxide rich flue gas are provided. A boiler system includes a boiler, being operative for combusting a fuel and generating a carbon dioxide rich flue gas, and the flue gas treatment system. The flue gas treatment system includes a gas cleaning system, a nitrogen oxides reduction unit, being operative for reducing at least a portion of a nitrogen oxide(s) content of the flue gas, and a compression and cooling device being operative for pressurizing and cooling at least a portion of the flue gas treated by the gas cleaning system and the nitrogen oxide(s) reduction unit.

Abstract: The invention pertains to a system for purification of a carbon dioxide rich flue gas generated in a boiler combusting a fuel in the presence of a gas containing oxygen, and being contaminated by NOx gases, wherein the system comprising one or more gas drier(s) comprising desiccants for removal of at least a portion of water content of the further compressed carbon dioxide rich flue gas; and a closed loop connected to the drier(s) for regeneration of desiccants of the drier(s) wherein the NOx gases are removed substantially separately from the water vapor. The invention pertains also to a method for removing the NOx gases substantially separately from the water vapor.

Abstract: The present disclosure relates to a boiler system that includes an oxyfuel boiler in which a stream of oxygen and a fuel are combusted to generate a stream of flue gas. A flue gas condenser condenses the cleaned flue gas. A flue gas compression unit produces a stream of pressurized carbon dioxide rich flue gas. A pressure control system measures and controls the pressure after the flue gas conditioning system to a predetermined set value. A flow control system measures and controls the flow after the flue gas compression unit to a predetermined set value. The present disclosure further relates to a method of operating such a boiler system for an oxy-fuel process as well as to a power plant comprising such a system.

Abstract: The present invention relates to a method and system for combustion of a fuel and treatment of the resulting flue gas.

Abstract: The present invention relates to a method of cleaning a process gas containing sulphur dioxide the method including removing sulphur dioxide from the process gas by contacting the process gas with seawater to generate an at least partly cleaned process gas in a first gas cleaning device. In a second gas cleaning device, being arranged in direct fluid connection with the first gas cleaning device, the at least partly cleaned process gas having passed through the first gas cleaning device is cooled to condense water there from, thereby generating a process gas having a reduced content of water vapour. At least a part of the condensed water generated in the second gas cleaning device is passed to the first gas cleaning device. The present invention moreover relates to a gas cleaning system for cleaning of a process gas containing sulphur dioxide.

Abstract: The present disclosure relates to a method of operating a boiler system that includes an oxyfuel boiler in which an oxygen stream and a fuel stream are combusted to generate a stream of flue gas, an oxygen gas source producing the stream of oxygen for the boiler, and a gas processing unit for cleaning and compressing at least a portion of the stream of flue gas generated in the boiler for producing a stream of pressurized fluid comprising carbon dioxide. The method includes operating the boiler system, at least for a period of time, in an evaporation mode, in which a stream of oxygen from the oxygen gas source in liquid form is evaporated prior to being introduced in the boiler by transferring heat energy to the stream of liquid oxygen from a first stream of carbon dioxide of the gas processing unit. The present disclosure further relates to a boiler system for an oxy-fuel process as well as to a power plant comprising such a system.

Abstract: The invention relates to a method of conditioning a condensate generated in the compression section of a gas purification unit. The invention also relates to system for this method.

Abstract: A refrigeration system for condensation of carbon dioxide (CO2) in a flue gas stream, the system includes a refrigeration circuit, a flue gas treatment system that includes a flue gas compressor, a flue gas adsorption drier, and a refrigeration system for condensation of CO2; and a method for condensation of CO2 in a flue gas stream using a circulating stream of an external refrigerant.

Abstract: The invention pertains to a system for purification of a carbon dioxide rich flue gas generated in a boiler combusting a fuel in the presence of a gas containing oxygen, and being contaminated by NOx gases, wherein the system comprising one or more gas drier(s) comprising desiccants for removal of at least a portion of water content of the further compressed carbon dioxide rich flue gas; and a closed loop connected to the drier(s) for regeneration of desiccants of the drier(s) wherein the NOx gases are removed substantially separately from the water vapour. The invention pertains also to a method for removing the NOx gases substantially separately from the water vapour.

Abstract: The present invention relates to a method and a system for cleaning a CO2 rich flue gas stream containing water vapor and NOX prior to CO2 sequestration.

Abstract: The present disclosure relates to a method and an arrangement for expanding a gas stream comprising carbon dioxide, CO2. The method includes: removing CO2 from a process gas to produce a CO2 lean gas stream comprising residual CO2; monitoring a temperature of the gas stream downstream of an expander; controlling a pressure of the gas stream downstream of the expander by means of a pressure controller; and overriding the pressure controller when the temperature downstream of the expander is below a predefined minimum temperature; whereby deposition of solid CO2 from the residual CO2 in the gas stream is avoided. The disclosure also relates to a gas cleaning system and a power plant, such as an oxy-combustion power plant, associated with the arrangement.

Abstract: A method for drying a wet CO2 rich gas stream from an oxy-combustion process that includes: compressing the wet CO2 rich gas stream to a drying process operating pressure, cooling the wet CO2 rich gas stream in at least one cooler, alternately drying the wet CO2 rich gas stream in at least one dryer which contains at least one desiccant bed and regenerating the desiccant bed by conducting a heated regenerating gas through the dryer in opposite direction to the flow direction of the wet CO2 rich gas stream, separating the dried CO2 rich gas stream in a purification process to a purified CO2 gas stream and a waste gas stream rich in nitrogen and oxygen, whereby the waste gas stream rich in nitrogen and oxygen is used as regenerating gas, and subsequently to the regeneration the dryer is purged at least once by a pressurized CO2 rich gas stream conducted from the compressor, and whereby the dryer is charged up to the drying process operating pressure with a pressurized CO2 rich gas stream conducted from the comp

Abstract: The present invention relates to a method of pressurising a fluid comprising carbon dioxide, the method includes: obtaining the fluid from a unit for removing carbon dioxide from a process gas; compressing the fluid to a pressure above the critical pressure of carbon dioxide; and cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid. The invention further relates to an apparatus for pressurising a fluid comprising carbon dioxide, the apparatus including: means for obtaining the fluid from a unit for removing carbon dioxide from a process gas; means for compressing the fluid to a pressure above the critical pressure of carbon dioxide; and means for cooling the compressed fluid to a temperature above the critical temperature of carbon dioxide to produce a supercritical fluid.

Abstract: A gas purification system for cleaning a carbon dioxide rich flue gas generated in a boiler combusting a fuel in the presence of a gas containing oxygen. The gas purification system includes a compressor for compressing the carbon dioxide rich flue gas, a first gas cooler for cooling the compressed carbon dioxide rich flue gas, a mercury adsorber arranged downstream of the first gas cooler for removing at least a portion of a mercury content of the cooled compressed carbon dioxide rich flue gas, a second gas cooler arranged downstream of the mercury adsorber for further cooling the compressed carbon dioxide rich flue gas, and a gas drier for removing at least a portion of a water content of the further cooled compressed carbon dioxide rich flue gas.

Abstract: Disclosed herein is a system comprising an air reactor; where the air reactor is operative to oxidize metal oxide particles with oxygen from air to form oxidized metal oxide particles; a fuel reactor; where the fuel reactor is operative to release the oxygen from the oxidized metal oxide particles and to react this oxygen with fuel and steam to form syngas; a water gas shift reactor located downstream of the fuel reactor; where the water gas shift reactor is operative to convert syngas to a mixture of carbon and hydrogen; a combustor; and a gas turbine; the combustor being operative to combust the hydrogen and discharge flue gases derived from the combustion of hydrogen to drive the turbine; where the exhaust from the turbine is carbon free.

Abstract: A plant for CO2 separation is described that has a high security level, minimized energy consumption and can deliver liquid CO2 from the flue gas of a fossil fired power plant at different purity levels.