Application of porous structured organic films for gas separation
View Patent ↗Methods for performing separation of gaseous entities via contacting the gaseous entities with a sorbent material including a porous structured organic film including a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein at a macroscopic level the covalent organic framework is a film are described.
1. A method for the uptake of gaseous entities into a sorbent material, the method comprising contacting the gaseous entities with the sorbent material, the sorbent material comprising a porous structured organic film (SOF) comprising a plurality of segments including at least a first segment type and a plurality of linkers including at least a first linker type arranged as a covalent organic framework (COF), and a plurality of pores, wherein the first segment type and/or the first linker type comprises at least one atom that is not carbon and the plurality of pores comprises a plurality of accessible sites for the uptake of the gaseous entities.
2. The method of claim 1 , wherein the gaseous entities comprise a mixture of one or more target gaseous entities and one or more non-target entities, and the plurality of pores comprise a plurality of accessible sites for selective uptake of the one or more target gaseous entities.
3. The method of claim 2 , wherein contacting the gaseous entities with a sorbent material further comprises diffusing the one or more target gaseous entities into the plurality of accessible sites for the selective uptake of the one or more target gaseous entities.
4. The method of claim 2 , wherein the one or more target gaseous entities are a contaminant.
5. The method of claim 2 , wherein the one or more non-target gaseous entities comprise water, and the step of contacting the gaseous entities with a sorbent material further comprises contacting a water vapor feed stream with the sorbent material and diffusing the water vapor through the sorbent material in order to selectively uptake the one or more target gaseous entities.
6. The method of claim 2 , wherein the one or more non-target gaseous entities comprise natural gas, and the step of contacting the gaseous entities with a sorbent material further comprises contacting a natural gas feed stream with the sorbent material and selectively absorbing and/or adsorbing one or more gaseous contaminants.
7. The method of claim 2 , wherein the one or more non-target gaseous entities comprise carbon dioxide, and the step of contacting the gaseous entity with a sorbent material further comprises contacting carbon dioxide gas feed stream with the sorbent material and selectively absorbing and/or adsorbing one or more gaseous contaminants.
8. The method of claim 2 , wherein the one or more non-target gaseous entities comprise hydrogen, and the step of contacting the gaseous entity with a sorbent material further comprises contacting a nitrogen, methane, ammonia, and/or hydrocarbon gaseous feed stream with the sorbent material and selectively absorbing and/or adsorbing one or more gaseous contaminants.
9. The method of claim 2 , wherein the one or more non-target gaseous entities comprises oxygen, and the step of contacting the gaseous entity with a sorbent material further comprises contacting an air feed stream with the sorbent material and selectively absorbing and/or adsorbing one or more of nitrogen, carbon dioxide, and/or contaminants.
10. The method of claim 1 , wherein the gaseous entities are gaseous chemical entities.
11. The method of claim 1 , wherein the uptake of the gaseous entities is reversible.
12. The method of claim 1 , wherein the uptake of the gaseous entities is followed by the storage of the gaseous entities for a predetermined duration.
13. The method of claim 1 , wherein the SOF comprises a thermal stability range of at least up to 200° C. and/or a Langmuir surface area of from about 75 m 2 /g to about 3500 m 2 /g.
14. The method of claim 1 , wherein the SOF is a capped SOF.
15. The method of claim 1 , wherein the porous SOF is prepared by:
(a) preparing a liquid-containing reaction mixture comprising:
a plurality of molecular building blocks each comprising a segment and functional groups;
(b) depositing the reaction mixture as a wet film;
(c) promoting change of the wet film to form a dry SOF; and
(d) activating the dry SOF by emptying the plurality pores and substantially removing any residual chemical species, which have a disproportionately high affinity for the SOF, that remain after formation of the SOF.
16. The method of claim 1 , wherein the porous SOF is functionalized such that sorbent material selectively uptakes a target gaseous entities.
17. The method of claim 1 , the plurality of pores has a unimodal or multi-modal size distribution.
18. The method of claim 1 , wherein contacting the feed gas with the sorbent material further comprises performing pressure swing adsorption or employing reverse osmosis.
19. The method of claim 1 , wherein the plurality of linkers are selected from the group consisting of single atom linkers, single covalent bond linkers, double covalent bond linkers, ester linkers, ketone linkers, amide linkers, amine linkers, imine linkers, ether linkers, urethane linkers, and carbonates linkers; and the plurality of segments have a core selected from the group consisting of carbon, nitrogen, silicon, or phosphorous atomic cores, alkyl cores, fluoroalkyl cores, alkoxy cores, aryl cores, carbonate cores, carbocyclic cores, carbobicyclic cores, carbotricyclic cores, and oligothiophene cores.
20. The method of claim 1 , wherein the porous SOF has either a disproportionately high affinity and/or capacity for the one or more target gaseous entities or a disproportionately low affinity and/or capacity for one or more target gaseous entities.