The present invention relates to a method and system for separating CO.sub.2 based on regenerative chemical absorption, including an absorber where the CO.sub.2 remains retained in an absorbent liquid, and including a regenerator where the CO.sub.2 is released, obtaining a regenerated absorbent that is re-used in the absorption unit. The invention proposes a configuration of the entire capturing process which allows an efficient operation that significantly reduces the energy requirements mainly associated with the regeneration of the absorbent, as well as a lesser thermal degradation of same.

A membrane contactor for separating components from a feed gas stream comprises a housing, a feed gas inlet for receiving the feed gas stream at a first pressure, and a liquid inlet or receiving a stream of liquid at a second pressure, the liquid containing an absorbent for reacting components of the gas stream and a slip gas outlet. The contactor also includes a plurality of fibers with pore channels in contact with the feed gas incoming from the gas inlet on a first side, and in contact with liquid incoming from the liquid inlet on a second side, producing a gas-liquid interface at the pore channels. Liquid is prevented from wetting the pore channels by maintaining the first pressure of the gas stream higher than the liquid stream, and a portion of the gas stream bubbles through as slip gas into the liquid stream due to the elevated pressure.

A separation method including: preparing a separation device including an absorption processor absorbing into an absorption liquid a target component in a fluid to be processed, by an absorption microduct and a cooling medium microduct positioned for heat exchange; causing the fluid to be processed and the absorption liquid to pass through the absorption microduct in mutual contact, thus causing the target component to be absorbed into the absorption liquid from the fluid to be processed; cooling the fluid to be processed and the absorption liquid by flowing a cooling medium through the cooling medium microduct, and causing heat exchange between the fluid to be processed and absorption liquid flowing through the absorption microduct and the cooling medium; and separating, into the fluid to be processed and the absorption liquid, the mixed fluid of the fluid to be processed after the target component has been absorbed by the absorption liquid.

A CO.sub.2 recovery system includes: a CO.sub.2 absorber that transports flue gas with CO.sub.2 into contact with a CO.sub.2 absorbent to remove the CO.sub.2 and discharges a rich solution that has absorbed the CO.sub.2; an absorbent regenerator that separates the CO.sub.2 from the rich solution to regenerate the CO.sub.2 absorbent as a lean solution; a gas discharge line where a CO.sub.2 entrained gas from the absorbent regenerator is discharged; a reflux water drum that produces reflux water by separating CO.sub.2 and water from the CO.sub.2 entrained gas; a separation-gas discharge line where the separated CO.sub.2 is discharged; a compressor that compresses the separated CO.sub.2 gas; a condensate water drum that forms compressor condensate water by separating water from the compressed CO.sub.2 gas to form compressor condensate water; and a compressor-condensate water line that supplies the compressor condensate water as in-system or out-of-system supply water.

A carbonator reactor includes a cylindrical body, a nozzle for supplying a gas stream, inside the carbonator reactor and above the surface of a liquid phase and where the nozzle is located at the top of the reactor body, an inlet, an outlet, means for regulating the temperature and the pressure, a stirring system and at least one baffle regulating the stirring of the liquid phase and the mass transfer of the gas into the liquid surface, at least one impeller having inclined blades that make an angle from 5? to 60? with respect to the vertical axis. The reactor prepares sodium carbonate and has a configuration for the mass transfer of a gas phase in a liquid phase. A method for the preparation of sodium carbonate by means of the carbonator reactor by capturing CO.sub.2 in an NaOH aqueous solution, directly on the free surface of the liquid phase.

An air purification and recirculation system positioned within an animal rearing/sheltering facility. The system draws untreated air into an elongated air treatment apparatus having a dust scrubbing section, an ammonia scrubbing section, and acid scrubbing section, configured so that the treatment sections are positioned in series. At the end of the air treatment process, the treated air is exhausted back into the animal rearing facility so that the air is circulated within the facility. Acid and water used during the air treatment process are continuously recycled and directed back through the scrubbers in the air treatment apparatus.

A system and method are provided for capturing carbon dioxide from a flue gas. The system includes an absorber, a stripper, a cooling system and a control module. The cooling system is adapted to independently cool (a) a flue gas upstream from an absorber flue gas inlet and (b) a carbon dioxide-lean carbon capture solution being delivered to each of a plurality of lean carbon capture solution inlets at the different levels of the absorber. The control module includes a controller and a plurality of temperature sensors. The controller is responsive to the plurality of temperature sensors provided at each of the different levels of the absorber to control operation of the cooling system and thereby maintain a desired temperature profile at the different levels of the absorber to enhance rich loading of carbon dioxide from the flue gas to a carbon capture solution and reduce energy requirements for lean carbon capture solution regeneration in the stripper.

The present invention relates to a method for carbon dioxide capture and concentration by partitioned multistage circulation based on mass transfer-reaction regulation. In the present invention, multiple means such as multistage circulating absorption, intelligent multi-factor regulation, pre-washing and cooling, inter-stage cooling, post-stage washing, slurry cleaning, cooling water waste heat utilization, small-particle-size and high-density spraying, external strengthening field such as a thermal field/ultrasonic field/electric field, and catalysis by composite catalyst are adopted, so that the target for low cost, low energy consumption, stability and high efficiency is realized. The secondary pollutants are effectively inhibited while carbon dioxide is efficiently captured; meanwhile, high-efficiency capture, low-energy desorption, and high-purity concentration of carbon dioxide are implemented. From top to bottom in sequence, the multistage circulation is used to remove aerosols, improves carbon capture efficiency, maintains absorption rate, concentrates solution, which reduces the carbon emission reduction cost.

A scrubber system configured to react gas phase nitrogen dioxide and carbon monoxide emissions from process applications in scrubber tower equipment with the use of reducing agent chemistry combined with copper silver ionization.

A system for simultaneous heat recovery and flue gas cleaning, comprising at least one heat pump (300), at least one combined heat recovery and flue gas cleaning unit (1) comprising a heat exchanger (10), said unit having an inlet (20) directing a flow of flue gas into said unit, an outlet (40) for allowing said flow of flue gas to leave said unit, wherein said heat pump is adapted to deliver a flow of cooling media to the heat exchanger at a temperature in the interval of about 4 to about +4 C. This system is compact, efficient and easy to operate. The system can easily be expanded thanks to a modular concept, and it is well suited for mobile applications. A method for heat recovery and flue gas cleaning is also disclosed.