CN-121988298-A - Desiccant coating system

Abstract

The present invention relates to desiccant coating systems. The present disclosure relates to sorbent compositions useful for adsorbing water from the atmosphere. In particular embodiments, the sorbent composition may be disposed alone as a sorbent layer, or may be disposed as a sorbent layer on a base material, which may be reconfigured into a plurality of structural components that may be used to assemble a water capture module disposed within the adsorption/desorption structure of a water collector.

Inventors

• Pavlo Kravchenko
• Avigan Nikolai Kapustin

Assignees

• 水收集公司

Dates

Publication Date

20260508

Application Date

20251029

Priority Date

20241101

Claims (20)

1. 1. A water collector, comprising: A plurality of sorbent panels disposed in a spatially fixed relationship defining fluid flow paths between adjacent pairs of the sorbent panels; wherein each of the sorbent panels comprises a layer of a substantially solvent-free sorbent composition, the initial wet sorbent composition of the substantially solvent-free sorbent composition comprising: about 10wt to about 60 wt% of an adsorbent, wherein the adsorbent has a water absorption capacity of about 0.1 to about 2 grams of water per gram of adsorbent; About 5 wt to about 30 wt% of a polymeric binder; about 0.25 wt to about 5.0 wt% of a thickener, and Comprising the remaining wt.% of a solvent, wherein the solvent dissolves or emulsifies the adhesive.
2. 2. A water collector, comprising: A plurality of sorbent panels disposed in a spatially fixed relationship defining fluid flow paths between adjacent pairs of the sorbent panels; wherein each of the sorbent panels comprises a layer of a substantially solvent-free sorbent composition, the initial wet sorbent composition of the substantially solvent-free sorbent composition comprising: about 10wt to about 60 wt% of an adsorbent, wherein the adsorbent has a water absorption capacity of about 0.1 to about 2 grams of water per gram of adsorbent; about 5 wt to about 30 wt percent of a polymeric binder, and Comprising the remaining wt.% of a solvent, wherein the solvent dissolves or emulsifies the adhesive, Wherein each of the adsorbent panels is composed of the layer of the substantially solvent-free adsorbent composition.
3. 3. The water collector of claim 2, wherein the plurality of sorbent panels are constructed in a spatially fixed relationship such that the fluid flow path is defined between adjacent pairs of the sorbent panels by a three-dimensional printer using the wet sorbent composition.
4. 4. The water collector of claim 1, wherein the adsorbent comprises one or more of silica gel, molecular sieve, microporous zeolite, and metal organic framework.
5. 5. The water collector of claim 1, wherein the polymeric binder comprises one or more of an acrylic binder, a silicone binder, an acrylic latex binder, a silicone resin, an epoxy resin, an acrylate resin, an alkyd resin, a polyester resin, a vinyl ester resin, a polyvinyl butyral polymer, polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl methyl cellulose, polyurethane, and polyvinylidene fluoride.
6. 6. The water collector of claim 1, wherein the solvent comprises one or more of water, ethyl acetate, and ethanol.
7. 7. The water collector of claim 1, wherein the thickener comprises carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and ethyl cellulose.
8. 8. The water collector of claim 1, wherein the wet sorbent composition has a viscosity of about 900 cps to about 10,000 cps (about 0.9 Pa s to about 10.0 Pa s).
9. 9. The water collector of claim 1, wherein the wet sorbent composition further comprises from about 0.25 wt to about 5.0 wt% of a dispersant.
10. 10. The water collector of claim 9, wherein the dispersant comprises one or more of a fatty alcohol polyglycol ether sulfate, a phosphoethyl methacrylate polymer, na poly (methacrylic acid), hydroxypropyl poly (methacrylic acid) and blow molded herring oil.
11. 11. The water collector of claim 9, wherein the wet sorbent composition further comprises from about 1.0 wt to about 8.0 wt% plasticizer.
12. 12. The water collector of claim 11, wherein the plasticizer comprises one or more of diisononyl phthalate, diisodecyl phthalate, di-2-ethylhexyl phthalate, di-n-octyl phthalate, dioctyl adipate, acetyl tributyl citrate, and polyalkylene glycol.
13. 13. The water collector of claim 1, wherein the wet sorbent composition further comprises from about 1.0 wt to about 3.0 wt% of a surfactant.
14. 14. A water collector, comprising: A plurality of sorbent panels disposed in a spatially fixed relationship defining fluid flow paths between adjacent pairs of the sorbent panels; wherein each of the sorbent panels comprises a layer of a substantially solvent-free sorbent composition, the initial wet sorbent composition of the substantially solvent-free sorbent composition comprising: about 10wt to about 60 wt% of an adsorbent, wherein the adsorbent has a water absorption capacity of about 0.1 to about 2 grams of water per gram of adsorbent; about 5 wt to about 30 wt percent of a polymeric binder, and Comprising the remaining wt.% of a solvent, wherein the solvent dissolves or emulsifies the adhesive, Wherein the adsorbent in the layer of the substantially solvent-free adsorbent composition exhibits less than 15% water absorption capacity loss as compared to the adsorbent outside of the layer of the substantially solvent-free adsorbent composition.
15. 15. A water collector, comprising: A plurality of sorbent panels disposed in a spatially fixed relationship defining fluid flow paths between adjacent pairs of the sorbent panels; wherein each of the sorbent panels comprises a layer of a substantially solvent-free sorbent composition, the initial wet sorbent composition of the substantially solvent-free sorbent composition comprising: about 10 wt to about 60 wt% of an adsorbent, wherein the adsorbent has a water absorption capacity of about 0.1 to about 2 grams of water per gram of adsorbent; about 5 wt to about 30 wt percent of a polymeric binder, and Comprising the remaining wt.% of a solvent, wherein the solvent dissolves or emulsifies the adhesive, Wherein the layer of the substantially solvent-free sorbent composition has a thickness of from about 160 μm to about 350 μm.
16. 16. The water collector of claim 15, wherein the layer of substantially solvent-free sorbent composition has a water absorption capacity of about 3 mg H 2 O/cm 2 to about 7.5 mg H 2 O/cm 2 .
17. 17. A water collector, comprising: A plurality of sorbent panels disposed in a spatially fixed relationship defining fluid flow paths between adjacent pairs of the sorbent panels; wherein each of the sorbent panels comprises a layer of a substantially solvent-free sorbent composition, the initial wet sorbent composition of the substantially solvent-free sorbent composition comprising: about 10wt to about 60 wt% of an adsorbent, wherein the adsorbent has a water absorption capacity of about 0.1 to about 2 grams of water per gram of adsorbent; about 5 wt to about 30 wt percent of a polymeric binder, and Comprising the remaining wt.% of a solvent, wherein the solvent dissolves or emulsifies the adhesive, Wherein from about 75 wt% to about 85 wt% of the layer of the substantially solvent-free sorbent composition comprises the sorbent.
18. 18. The water collector of claim 1, wherein each of the sorbent panels comprises a substantially planar sorbent panel.
19. 19. The water collector of claim 18 wherein the adsorbent panels are disposed in a generally parallel, spatially fixed adjacent relationship at a distance apart to define the fluid flow path between generally planar adsorbent panels.
20. 20. A water collector, comprising: A plurality of sorbent panels disposed in a spatially fixed relationship defining fluid flow paths between adjacent pairs of the plurality of sorbent panels; wherein each of the plurality of sorbent panels comprises a layer of a substantially solvent-free sorbent composition, the initial wet sorbent composition of the substantially solvent-free sorbent composition comprising: about 10 wt to about 60 wt% of an adsorbent, wherein the adsorbent has a water absorption capacity of about 0.1 to about 2 grams of water per gram of adsorbent; about 5 wt to about 30 wt percent of a polymeric binder, and Comprising the remaining wt.% of a solvent, wherein the solvent dissolves or emulsifies the adhesive, Wherein the plurality of adsorbent panels comprises a first plurality of corrugated adsorbent panels and a second plurality of substantially planar adsorbent panels.

Description

Desiccant coating system Technical Field The present disclosure relates to sorbent compositions useful for adsorbing water from a process fluid stream. In particular embodiments, the sorbent composition may be disposed alone as a sorbent composition layer, or may be disposed as a sorbent composition layer on a base material, any of which may be reconfigured into a plurality of structural components that may be used to assemble a water capture module disposed in the adsorption/desorption structure of a water collector. Background The adsorbent comprises a material that adsorbs water from the atmosphere and desorbs water from the adsorbent that meets the corresponding adsorbent isotherm. The adsorbent may be obtained as finely divided particles that need to be converted into an adsorbent composition and form factor that can be used as a structural component in the production of water collectors. However, conventional dry sorbent compositions have relatively low sorbent levels, ranging from 30 weight percent ("wt.%) to 60 wt wt.%, and/or the water adsorption capacity loss of the sorbent within the dry sorbent composition may be greater than 15 percent (" wt.% "). In addition, conventional sorbent compositions must be applied to the support substrate material and cannot be used as discrete structural components from the support substrate material. Furthermore, current sorbent compositions may not adhere sufficiently to the substrate material or may not exhibit sufficient elasticity on the substrate material to be reconfigured into structural components useful in the production of water capture modules for use in water collectors. An adsorbent composition exhibiting a series of discrete isotherm steps, each having a relatively high adsorbent content in the dry adsorbent composition of from about 65 wt% to about 85 wt%, wherein the adsorbent in the dry adsorbent composition has a water adsorption capacity loss of less than 15%, would have substantial advantages. In addition, a sorbent composition that can be disposed in a sorbent layer that can be used as a structural component without application to a substrate material would be of substantial advantage. Further, the sorbent composition will have substantial advantages in that it can be reconfigured after application to a substrate material into structural components that can be used to assemble water capture modules that can be placed in the adsorption/desorption structure of a water collector. Disclosure of Invention Accordingly, a broad object of particular embodiments of the invention can provide an adsorbent composition useful for producing an adsorbent panel, the adsorbent composition comprising a layer of the adsorbent composition, wherein the adsorbent composition comprises about 10 wt% to about 60 wt% of an adsorbent having a water absorption capacity of about 0.2 g water/g adsorbent to about 2g water/g adsorbent, about 5 wt% to about 30 wt% of a polymeric binder, and a solvent comprising the remaining wt.% of the adsorbent composition, wherein the solvent dissolves or emulsifies the binder. In particular embodiments, each of the plurality of sorbent panels may comprise a dry-only state of the sorbent composition layer. In particular embodiments, the layer of sorbent composition may be disposed on one or both sides of the substrate material. In particular embodiments, the sorbent composition layer may be wound into a roll without the sorbent composition layer self-adhering in the roll. Another broad object of the invention can be to produce a water capture module comprising a plurality of sorbent panels disposed in a spatially fixed relationship defining a fluid flow path between adjacent pairs of the plurality of sorbent panels, wherein each of the plurality of sorbent panels comprises a sorbent composition disposed in a sorbent composition layer, wherein the sorbent composition comprises at least about 10 wt% to about 60 wt% of a sorbent, wherein the sorbent has a water absorption capacity of about 0.2 grams of water per gram of sorbent to about 2 grams of water per gram of sorbent, about 5 wt% to about 30 wt% of a polymeric binder, and a solvent comprising the remaining wt.% of the sorbent composition, wherein the solvent dissolves or emulsifies the binder and/or disperses the solvent. Another broad object of the invention can be to produce a water trap that includes an adsorption/desorption structure in which a plurality of water capture modules can be positioned, and wherein the adsorption/desorption structure switches at least one water capture module from an adsorption mode in which the plurality of adsorbent panels adsorb water from a process fluid stream passing through the water capture module to a desorption mode in which the plurality of adsorbent panels desorb water into a heated fluid stream. In particular embodiments, the adsorption/desorption structure shifts at least one water capture module from a desorption mode in which the plurality