Gas separation
Gas separation can refer to any of a number of techniques used to separate gases, either to give multiple products or to purify a single product.
Swing adsorption techniques
[edit | edit source]Pressure swing adsorption
[edit | edit source]Pressure swing adsorption (PSA) pressurizes and depressurizes a multicomponent gas around an adsorbent medium to selectively adsorb some components of a gas while leaving other components free-flowing.[1]
Vacuum swing adsorption
[edit | edit source]Vacuum swing adsorption (VSA) uses the same principle as PSA but swings between vacuum pressures and atmospheric pressure.[2] PSA and VSA techniques may be combined and are called "vacuum pressure swing adsorption" (VPSA) in this case.
Temperature swing adsorption
[edit | edit source]Temperature swing adsorption (TSA) is similar to other swing adsorption techniques but cycles the temperature of the adsorbent bed-gas system instead of the gas pressure to achieve separation.[2]
Cryogenic distillation
[edit | edit source]Cryogenic distillation is typically only used for very high volumes because of its nonlinear cost-scale relationship, which makes the process more economical at larger scales. Because of this it is typically only used for air separation.[3]
See also
[edit | edit source]- Oxygen concentrator – Device that removes nitrogen from air
- Nitrogen generator – Air-to-nitrogen production complexes
- Industrial gas – Gaseous materials produced for use in industry
- Air separation – Chemical process
- Natural-gas processing – Industrial processes designed to purify raw natural gas
- Solid sorbents for carbon capture – Materials that absorb carbon dioxide
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).