Sorbents for removal of nitrogen oxides and method of making
AssigneeCalgon Carbon Corporation
InventorsPhilippe WESTREICH, Jason P. MAZZOCCOLI, Richard A. MIMNA
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Abstract
The present disclosure described compositions which may be effective in removing contaminants from a gas stream such as nitrous oxides. The composition may include a sorbent which contains triethylenediamine and a metal including copper, zinc, or a combination thereof. Methods of making such a composition are also described, along with devices which use the composition to remove contaminants from fluid streams, particularly in vehicle tunnels and parking garages.
Claims37
A composition for removing nitrogen oxides from a fluid stream in a vehicle tunnel, comprising:
- a sorbent having a first surface deposition comprising:
- about 1 wt. % to about 6 wt. % triethylenediamine, and
- about 3 wt. % to about 15 wt. % of a metal comprising copper, zinc, or a combination thereof.
A method of making a composition for removing nitrogen oxides from a fluid stream in a vehicle tunnel, comprising:
- contacting a sorbent material with a first solution comprising a copper salt, a zinc-containing compound, or a combination thereof to form an impregnated sorbent material,
- drying the impregnated sorbent material to form a dried impregnated sorbent material, and
- contacting the dried impregnated sorbent material with triethylenediamine to form a sorbent,
- wherein the sorbent is not impregnated with either of molybdenum or silver.
A method of removing nitrogen oxides from a fluid stream within a vehicle tunnel, comprising:
- providing a composition comprising:
- a sorbent having a first surface deposition comprising about 1 wt. % to about 6 wt. % triethylenediamine and about 3 wt. % to about 15 wt. % of a metal comprising copper, zinc, or a combination thereof,
- directing an initial fluid stream from the vehicle tunnel to an air filter device comprising the composition,
- contacting the initial fluid stream with the composition to produce a treated fluid stream, and
- directing the treated fluid stream back into the vehicle tunnel.
A tunnel air filter device for removing nitrogen oxides from a fluid stream in a vehicle tunnel, comprising:
- a sorbent having a first surface deposition comprising:
- about 1 wt. % to about 6 wt. % triethylenediamine, and
- about 3 wt. % to about 15 wt. % of a metal comprising copper, zinc, or a combination thereof,
- wherein the sorbent is contained within a housing.
Dependencies are inferred from the claim text.