Systems and methods for removing species from gas streams
AssigneeMassachusetts Institute of Technology
InventorsKripa K. Varanasi, Vishnu Jayaprakash, Sreedath Panat, Simon B. Rufer
Life of this patent
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Abstract
Various embodiments address removal of one or more species from a gas stream by exposing the gas stream to divided portions of a fluid, such as droplets of water or mist, where the fluid, and/or content of the fluid, can absorb or modify the species and thereby remove it at least partially from the gas stream. Removal of CO2 from a combustion exhaust stream is one embodiment.
Claims23
A system for removing a gaseous species from a gas stream, comprising:
- a gas flow pathway having an inlet for receiving the gas stream and an outlet for releasing the gas stream, wherein the gas stream contains less of the gaseous species at the outlet than is contained in the gas stream at the inlet;
- a gaseous species absorption zone along the gas flow pathway;
- a source of a liquid mist configured to introduce the liquid mist into the gaseous species absorption zone, wherein the gaseous species absorption zone is configured to expose the liquid mist to the gas stream under conditions that facilitate transfer of at least some of the gaseous species from the gas stream to the liquid mist;
- and
- an electrostatic separation zone along the gas flow pathway, fluidly connected to the gaseous species absorption zone and configured to electrostatically separate at least some of the liquid mist from the gas stream.
A system for removing a gaseous species from a gas stream, comprising:
- a gas flow pathway having an inlet for receiving the gas stream and an outlet for releasing the gas stream, wherein the gas stream contains less of the gaseous species at the outlet than is contained in the gas stream at the inlet;
- a gaseous species absorption zone along the gas flow pathway;
- a source of a liquid mist configured to introduce the liquid mist into the gaseous species absorption zone, wherein the gaseous species absorption zone is configured to expose the liquid mist to the gas stream under conditions that facilitate transfer of at least some of the gaseous species from the gas stream to the liquid mist, wherein the liquid mist comprises a plurality of droplets, and wherein each droplet of the plurality of droplets has a maximum characteristic dimension less than or equal to 70 micrometers;
- and
- a separation zone along the gas flow pathway, fluidly connected to the gaseous species absorption zone and configured to separate at least some of the liquid mist from the gas stream.
A system for removing a gaseous species from a gas stream, comprising:
- a gas flow pathway having an inlet for receiving the gas stream and an outlet for releasing the gas stream, wherein the gas stream contains less of the gaseous species at the outlet than is contained in the gas stream at the inlet;
- a gaseous species absorption zone along the gas flow pathway;
- and
- an absorbent associated with the gaseous species absorption zone, wherein the gaseous species absorption zone is configured to expose the absorbent to the gas stream under conditions that facilitate transfer of at least some of the gaseous species from the gas stream to the absorbent,
- wherein an interfacial area between the absorbent and the gas stream is at least 10 times greater than an interfacial area between a comparative absorbent and a comparative gas stream in an absorption tower comprising a packed bed reactor that is otherwise essentially identical.
23-34. (canceled)
Dependencies are inferred from the claim text.