A contaminant removal system for removing a contaminant from an environment includes a gas separator, a scrubber-separator downstream of the gas separator, and a stripper-separator downstream of the scrubber-separator. The gas separator is configured to receive a cabin air stream from the environment and concentrate the contaminant from the cabin air stream to produce a concentrated cabin air stream. The cabin air stream includes the contaminant, and the concentrated cabin air stream has a higher concentration of the contaminant than the cabin air stream. The scrubber-separator is configured to absorb the contaminant from the concentrated cabin air stream into a liquid sorbent and discharge a clean air stream to the environment. The stripper-separator is configured to desorb the contaminant from the liquid sorbent into a contaminant stream.

Proposed is a method of monitoring odor-causing substances in flue gas, which comprises: providing a flue gas containing one or more odor-causing substances; introducing the flue gas into an odor removal unit; producing a gas-phase stream; dissolving a portion of the gas-phase stream in a solvent to produce a liquid-phase stream; and measuring an absorbance of the liquid-phase stream to identify the odor-causing substances.

Disclosed herein is a rotating packed bed, RPB, for mass transfer between a sorbent and a gas, the RPB comprising: a central chamber arranged to receive a flow of a sorbent that is a liquid; and a flow path for the sorbent between the central chamber and a region for mass transfer between a gas and the sorbent; wherein, in use, the flow of sorbent through the region for mass transfer is substantially in cross-flow with the flow of gas through the region for mass transfer. Advantageously, mass transfer between a liquid sorbent and a gas is improved.

The application relates to a marine exhaust flue gas desulphurization system and method comprising a wet scrubber system for reducing the amount of sulphur oxides present in an exhaust flue gas of one or more diesel engines of a marine vessel using a scrubber liquid and being configured to run in an open and in a closed loop mode. A magnesium hydroxide slurry prepared by hydrolysis of magnesium oxide powder with water is contacted with the used scrubber liquid in order to clean the used scrubber liquid and/or to neutralize the acidity thereof.

Various embodiments of a portable carbon dioxide (CO2) absorption system for reducing excess CO2 from a target environment are disclosed herein. The absorption system includes a carbon dioxide absorption machine defining a housing, a blower, a manifold system, and a carbon dioxide absorbing device. The carbon dioxide absorption machine may be configured for different applications including medical applications, industrial applications, semiconductor manufacturing applications, and applications associated with the general transportation and cargo of carbon dioxide.

The invention relates to a process for aftertreatment of gas streams in which unwanted components are present in an amount that varies irregularly in a periodic manner or over time and/or in a varying concentration, by means of an absorption or gas scrubbing process. For this purpose, during the entry of the desorption peak into the gas scrubbing apparatus, the amount of scrubbing medium is increased proceeding from a normal value during a first phase and, after the end of the desorption peak, the amount of scrubbing medium is returned back to the normal value during a second phase, wherein the laden scrubbing media are collected in different intermediate vessels during the two phases, mixed and released as a mixture to a downstream scrubbing medium regeneration apparatus.

The device and method of the invention are adapted to control temperature and humidity of the air in some defined volume such as a room in a house. The device consists of a quantity of hygroscopic material and means for passing air past or through the material. Direct temperature and humidity control occur when air is conditioned (heated and dried by sorption heating, or cooled and humidified by absorption cooling) and sent inside the room; indirect control is also possible, by affecting the temperature of the walls (the sorption material may occupy channels or spaces within the walls, which are then heated/cooled, indirectly heating/cooling the air in the room by conduction). A fan or blower will allow for forced convection of air in a desired path (e.g from outside the house, over/through the sorption material, and into the house, or in the opposite direction). A second fan and valves allow for more complex operations.

An acid gas removal apparatus includes a reclaimer control device that performs: first supply water control in which at least one of reflux water, steam condensate, and desalinated water is supplied to a reclaimer as first supply water, at non-volatile component removal reclaiming; second supply water control in which at least one of the reflux water, the steam condensate, and the desalinated water is supplied to the reclaimer, and a washing liquid including an acid gas absorbing liquid is supplied to the reclaimer as second supply water, at an initial stage of finish reclaiming; and third supply water control in which supply of the second supply water is stopped and at least one of the reflux water, the steam condensate, and the desalinated water is supplied as the first supply water, at a later stage of the finish reclaiming.

A method with corresponding systems for reducing emission of amines to the atmosphere. The method includes a a) introducing a gas containing CO.sub.2 into an absorber; b) flowing the flue gas through an absorber having an absorbent with a water-lean solution having less than 50% water and one or more amines, with the absorbent capturing the CO.sub.2 and forming a reduced CO.sub.2 content gas having a baseline CO.sub.2 content; and c) washing the reduced CO.sub.2 content gas in a wash column with a wash solution comprising carbonic acid formed by addition of gaseous CO.sub.2 into the wash solution. In this method, the washing removes the amines from the reduced CO.sub.2 content gas and produces a reduced amine content gas exiting from the wash column.

A carbon dioxide capture system includes a first capture system and a second capture system. The first capture system including a first absorber that causes carbon dioxide contained in a combustion exhaust gas to be absorbed in a first absorbing liquid. The second capture system causes carbon dioxide contained in a combustion exhaust gas to be absorbed in a second absorbing liquid. The second rich liquid releases carbon dioxide at a lower temperature than the first rich liquid.