Compositions, systems and methods using selective porous materials for oxygen separation
MOFs are disclosed that can efficiently adsorb oxygen from a gas stream, such as air. Systems and methods are also disclosed that utilize MOFs to separate oxygen from a gas stream. The separated oxygen may be used in a commercial process such as a combustion process.
1. A composition, comprising:
a metal-organic framework material capable of oxygen capture, the metal organic framework material consisting essentially of m/Cu-BTC, where BTC=benzene-1,3,5-tricarboxylic acid and m/Cu represents partial substitution of Cu with a metal ion (m) selected from a group consisting Sc, Ti, V, Mn, Fe and Co.
2. The composition of claim 1 , wherein m is Sc.
3. A process, comprising:
contacting a gas stream containing oxygen at a first concentration with a metal-organic framework material having the formula m/Cu-BTC, where BTC=benzene-1,3,5-tricarboxylic acid and m/Cu represents partial substitution of Cu with a metal ion (m) selected from a group consisting Sc, Ti, V, Mn, Fe and Co at a first temperature and first pressure to adsorb oxygen from the gas stream into the metal-organic framework; and
desorbing oxygen from the metal-organic framework material at a second temperature and a second pressure.
4. The process of claim 3 , wherein the first and second temperatures are equal.
5. The process of claim 3 , wherein the second pressure is less than the first pressure.
6. The process of claim 3 , wherein the second temperature is greater than the first temperature.
7. The process of claim 3 , wherein the first temperature is ambient temperature.