Absorption process for producing oxygen and nitrogen and solution therefor
Process for the separation and purification of oxygen and nitrogen is disclosed which utilizes solutions of oxygen carriers to selectively absorb oxygen from a gaseous stream, leaving nitrogen as a byproduct. In the process, an oxygen carrier capable of reversibly binding molecular oxygen is dissolved in a solvent solution, which absorbs oxygen from an oxygen-containing gaseous feed stream such as atmospheric air and desorbs oxygen to a gaseous product stream. The feed stream is maintained at a sufficiently high oxygen pressure to keep the oxygen carrier in its oxygenated form during absorption, while the product stream is maintained at a sufficiently low oxygen pressure to keep the carrier in its deoxygenated form during desorption. In an alternate mode of operation, the carrier solution is maintained at a sufficiently low temperature and high oxygen pressure to keep the oxygen carrier in its oxygenated form during absorption, and at a sufficiently high temperature to keep the carrier in its deoxygenated form during desorption. Under such conditions, exceptionally high oxygen concentrations on the order of 95% to 99% are obtained, as well as a long carrier lifetime in excess of 3 months, making the process commercially feasible.
- Research Organization:
- Bend Research, Inc., Bend, OR (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC06-79ER10337
- Assignee:
- Bend Research, Inc. (Bend, OR)
- Patent Number(s):
- 4,451,270
- Application Number:
- 06/393,711
- OSTI ID:
- 865023
- Resource Relation:
- Patent File Date: 1982 Jun 30
- Country of Publication:
- United States
- Language:
- English
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Absorption process for producing oxygen and nitrogen and solution therefor
Absorption process for producing oxygen and nitrogen and solution therefor
Related Subjects
process
producing
oxygen
nitrogen
solution
separation
purification
disclosed
utilizes
solutions
carriers
selectively
absorb
gaseous
stream
leaving
byproduct
carrier
capable
reversibly
binding
molecular
dissolved
solvent
absorbs
oxygen-containing
feed
atmospheric
air
desorbs
product
maintained
sufficiently
pressure
oxygenated
form
deoxygenated
desorption
alternate
mode
operation
temperature
conditions
exceptionally
concentrations
95
99
obtained
lifetime
excess
months
commercially
feasible
carrier solution
oxygenated form
oxygen concentrations
atmospheric air
deoxygenated form
oxygen concentration
gaseous stream
product stream
oxygen-containing gas
feed stream
gaseous product
containing gas
gaseous feed
oxygen pressure
oxygen carrier
carrier lifetime
molecular oxygen
carrier capable
binding molecular
leaving nitrogen
process commercially
alternate mode
reversibly binding
solvent solution
oxygen-containing gaseous
commercially feasible
producing oxygen
selectively absorb
oxygen carriers
utilizes solutions
sorption process
absorption process
absorb oxygen
containing gaseous
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