Scrubber for removing heavy metals from gases
AssigneeYissum Research Development Company of the Hebrew University of Jerusalem
InventorsYoel Sasson, Mandan Chidambaram, Zach Barnea
Life of this patent
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Abstract
A wet scrubber for absorbing a heavy metal from a gas stream, a liquor for said wet scrubber, and a power-plant comprising said wet scrubber are described. The wet scrubber has a liquor containing an oxidizer in ionic liquid. Optionally, the oxidizer has, in pure state, high vapor pressure, and in the ionic liquid, the oxidizer forms a complex that has a much lower vapor pressure. In a preferred embodiment, the liquor is substantially free of any ligand that binds to the metal to be absorbed by the liquor.
Claims37
A wet scrubber for absorbing elemental heavy metal from a gas stream, the scrubber comprising:
- a vessel having a gas inlet and a gas outlet, and in the vessel,
- a liquor comprising:
- an oxidizer capable of oxidizing said elemental heavy metal and
- an ionic liquid,
- the liquor being substantially free of any ligand capable of binding an ion of the heavy metal.
(canceled)
A wet scrubber for absorbing, at a working temperature, a heavy metal from a gas stream, the scrubber comprising:
- a vessel having a gas inlet and a gas outlet, and in the vessel,
- a liquor comprising:
- an ionic liquid comprising an anion and a cation, and
- an oxidizing complex capable of oxidizing, at the working temperature, said heavy metal, the oxidizing complex comprising an oxidizing moiety and a complexing agent, said oxidizing complex having, in the liquor, a partial vapor pressure that is at least 10 times smaller than a vapor pressure of the oxidizing moiety in pure state.
-11. (canceled)
(canceled)
A wet scrubber for absorbing a heavy metal from a gas stream, the scrubber comprising:
- a vessel having a gas inlet and a gas outlet, a liquid inlet and a liquid outlet, and in the vessel, a liquor moving from the liquid inlet to the liquid outlet, the liquor comprising an ionic liquid and an oxidizer capable of oxidizing the heavy metal.
-19. (canceled)
-24. (canceled)
A method of scrubbing elemental heavy metal from a gas stream, the method comprising:
- providing a liquor free to move in a vessel, the liquor comprising an ionic liquid and an oxidizer capable of oxidizing the elemental metal;
- and
- directing the gas stream into the vessel so as to contact with the liquor.
-29. (canceled)
-34. (canceled)
A compound of the general formula A+X−Y2, wherein
- A+X−, at 25° C., is an ionic liquid;
- and
- X and Y are each independently F, Cl, Br, or I.
-48. (canceled)
Dependencies are inferred from the claim text.