Method for scavenging mercury
First Claim
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1. A method for removing mercury from a gas stream, comprising:
- contacting the gas stream with a getter composition that oxidizes volatile or insoluable Hg to non-volatile or soluble Hg, wherein said material is in a gaseous state prior to contact with the volatile or insoluble mercury in the gas stream.
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Abstract
Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting of flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.
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Citations
20 Claims
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1. A method for removing mercury from a gas stream, comprising:
- contacting the gas stream with a getter composition that oxidizes volatile or insoluable Hg to non-volatile or soluble Hg, wherein said material is in a gaseous state prior to contact with the volatile or insoluble mercury in the gas stream.
- View Dependent Claims (2, 4, 5, 6)
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3. A method for removing mercury from gas stream, comprising:
- contacting the gas stream with liquid bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride to oxidize volatile or insoluble Hg to non-volatile or soluble Hg.
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7. A method for removing mercury from a gas stream, comprising:
- contacting the gas stream with a getter composition that oxidizes volatile or insoluable Hg to non-volatile or soluble Hg, the getter absorbed onto a sorbent selected from the group consisting of limestone, lime, calcium sulphate, calcium sulfite, silicate, alumina and mixtures thereof, wherein the getter composition comprises bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof.
- View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for removing mercury from a gas stream, comprising:
- contacting the gas stream with a getter composition that oxidizes volatile or insoluable Hg to non-volatile or soluble Hg, the getter adsorbed onto a sorbent selected from the group consisting of carbonaceous materials and flyash and mixture thereof, wherein the getter composition comprises bromochloride, sulphur bromide, sulphur dichlorid, or sulphur monochloride and mixtures thereof.
- View Dependent Claims (16, 17, 18, 19, 20)
Specification