A flue gas can be cooled for carbon capture purposes with the use of a gas-to-gas exchanger, using air as the cooling media, downstream of a heat recovery process, and optionally upstream of a quenching process; the use of an amine chilling process to reduce the required flue gas cooling duties upstream of the CO.sub.2 absorber; the use of a gas-to-gas exchanger, using the absorber overhead as the cooling media, downstream of a heat recovery process, and optionally upstream of the quenching process; and/or the use of a quenching process in which heated water and condensate is cooled by an external cooling loop utilizing treated flue gas condensate in an evaporative cooling process.

Provided is a carbon dioxide recovery device including an absorption part that produces a compound of carbon dioxide and an amine contained in an absorbing solution, and a regeneration part that includes an anode that desorbs the carbon dioxide from the compound to produce a complex compound of the amine, and a cathode that is electrically connected to the anode and regenerates the amine from the complex compound.

A gas separation system has system input inlet configured to receive a stream mixture including a target gas, one or more spray generators positioned to spray a non-sprayable liquid to change a concentration of the target gas in the non-sprayable liquid, one or more system outlets positioned to outlet an output material, wherein at least one of the system outlets outputs a material having a lower amount of the target gas than the input stream mixture, and a recirculating path connected to the one or more outputs and the input inlet to allow recirculation of the non-sprayable liquid. A method of performing gas separation includes absorbing a target gas from an input stream in a non-sprayable capture liquid, and releasing the target gas in an output gas stream by spraying the non-sprayable capture liquid into a heated volume using a spray generator. A method of performing gas separation includes receiving an input stream that includes a target gas, using one or more spray generators to apply a non-sprayable liquid as a spray to the input stream to change a concentration of the target gas in the liquid, and outputting the liquid with the changed concentration through an outlet.

An exhaust gas carbon dioxide capture and recovery system that may be mounted on a mobile vehicle or vessel. The system may include an exhaust absorber system, a solvent regenerator, a solvent loop, a carbon dioxide compressor, and a carbon dioxide storage tank, among other components. The system may be configured and integrated such that energy in the exhaust may be used to power and drive the carbon dioxide capture while having minimal parasitic effect on the engine.

A method of capturing carbon dioxide (CO.sub.2) present in air is provided. The method includes adding a carbon-dioxide-capturing device to a heating, ventilation, and air conditioning (HVAC) system of a building. The carbon-dioxide-capturing device is added to one or both of an air handler and air-distribution ductwork of the HVAC system. The method further includes circulating air including carbon dioxide through the carbon-dioxide-capturing device in the HVAC system. A direct decarbonization system for capturing carbon dioxide present in air is also provided. The system includes an HVAC unit, air-distribution ductwork connected to the HVAC unit, and a carbon-dioxide-capturing device disposed in one or both of the HVAC unit and the air-distribution ductwork. Carbon dioxide gas present in air passing through the HVAC unit or the air-distribution ductwork is removable from the air by the carbon-dioxide-capturing device.

Processes and systems for the capture of CO.sub.2 from a CO.sub.2-containing gas stream are provided. The CO.sub.2-containing gas stream is passed to a membrane contactor absorber wherein the CO.sub.2-containing gas contacts or passes a first side of a membrane element while a CO.sub.2 selective solvent with a viscosity between 0.2 and 7 cP contacts, passes or flows on second side of the membrane, opposed to the first side. The CO.sub.2 permeates through the hollow fiber membrane pores and is chemically absorbed into the solvent.

The concerns a process for producing formic acid, (a) a carbon capture step in which a source of carbon dioxide is contacted with an amine solution in an amine scrubber, to obtain an ammonium bicarbonate solution, where the carbon capture uses a chilled amine solution having a temperature in the range of 0-20 ° C.; (b) inducing crystallization in the ammonium bicarbonate solution to obtain a concentrated ammonium bicarbonate solution; (c) subjecting the concentrated ammonium bicarbonate solution to a hydrogenation step to obtain an ammonium formate; and (d) heating the ammonium formate to a temperature in the range of 50-150 ° C., to obtain a gaseous product containing the amine and a liquid product stream containing formic acid. The application further concerns a system for performing the process.

A method for reducing the concentration of amines in a wash liquid stream exiting a wash section in an acid gas scrubbing process includes introducing the wash liquid stream exiting the wash section of the acid gas scrubbing process to an adsorbent material, wherein the wash liquid stream has a first concentration of amines. The wash liquid stream having the first concentration of amines is flowed through the adsorbent material, and the adsorbent material retains at least a portion of the amines thereby providing a wash liquid stream having a second, reduced concentration of amines. The wash stream with reduced concentration of amines is recycled back to the wash section to remove amines more effectively from the acid gas being scrubbed. The adsorbent material can be regenerated for reuse. Amine recovered from the regenerated adsorbent material can be recycled to the process for reuse.

A carbon dioxide recovery apparatus is disclosed including a flue gas cooling unit that brings flue gas cooling water into contact with a flue gas to cool the flue gas, a circulation channel through which the flue gas cooling water and condensed water are returned to the flue gas cooling unit, an absorption unit including a carbon dioxide absorbing section, and a flue gas washing section that brings the flue gas including carbon dioxide absorbed in the carbon dioxide absorbing section into contact with flue gas washing water and washes the flue gas, a regeneration unit that removes carbon dioxide from the absorbent including carbon dioxide absorbed in the absorption unit, a supply channel through which circulating water is guided, and a discharge channel through which the circulating water circulating through the flue gas cooling unit and the circulation channel is discharged to outside of a system.

A turbocharger control system includes a turbine; a fluid source of a pressurized fluid; an input valve fluidly coupled between the fluid source and an input of the turbine; a bypass valve fluidly coupled between the fluid source and an output of the turbine; a rotating machine operatively coupled to the turbine and configured to move a working fluid; and a control system communicably coupled to the input valve and the bypass valve. The control system is configured to perform operations including determining a level of the pressurized fluid in the fluid source; determining at least one of a flow rate or a pressure of a working fluid moved by the rotating machine; and operating the input valve and the bypass valve to change an operating state of the turbine from a first operating state to a second operating state.