Method for enhancing volumetric capacity in gas storage and release systems

Patent metadata

Field	Value
Publication number	US-12528069-B2
Application number	US-202418670008-A
Country	US
Kind code	B2
Filing date	May 21, 2024
Priority date	Jul 1, 2016
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

The present disclosure provides for a porous gas sorbent material with superior gravimetric working capacity and volumetric capacity, a gas storage system including a porous gas sorbent material of the present disclosure, methods of making the same, and method for storing a gas. The porous gas sorbent material includes a gas adsorbing material and a non-aqueous binder.

First claim

What is claimed is:

1 . A method of isolating methane from a biogas, the method comprising:
contacting biogas with a porous gas sorbent material having:
<about 100 cc/L volume in pores smaller than about 9 Å size;
>about 200 cc/L volume in pores about 9-27 Å size; and
>about 50 cc/L volume in pores about 27-490 Å size, wherein the porous gas sorbent material isolates methane from the biogas.

2 . The method of claim 1 , wherein the porous gas sorbent material comprises a gas adsorbing material and a non-aqueous binder.

3 . The method of claim 2 , wherein the non-aqueous binder is at least one of a fluoropolymer, a polyamide, a polyimide, fibrillated cellulose, a high-performance plastic, a copolymer with a fluoropolymer, a copolymer with a polyamide, a copolymer with a polyimide, a copolymer with a high-performance plastic, and a combination thereof.

4 . The method of claim 3 , wherein the fluoropolymer is at least one of poly(vinylidene difluoride), polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy alkane, or a combination thereof.

5 . The method of claim 3 , wherein the polyamide is at least one of Nylon-6,6′, Nylon-6, Nylon 6, 12, or a combination thereof.

6 . The method of claim 2 , wherein at least one of:
the non-aqueous binder is present in an amount of no greater than 10 wt %; the gas sorbent material is present in an amount of at least 90 wt %; the non-aqueous binder is a dispersion of about 50 wt % to about 70 wt % of the binder; or a combination thereof.

7 . The method of claim 2 , wherein at least one of:
the non-aqueous binder is present in an amount of about 2.5 wt % to about 7 wt %; the gas sorbent material is present in an amount of at least 93 wt %; the non-aqueous binder is a dispersion of about 55 wt % to about 65 wt % of the binder; or a combination thereof.

8 . The method of claim 1 , wherein the gas sorbent material is at least one of activated carbon, zeolite, silica, metal organic framework, covalent organic framework, or a combination thereof.

9 . The method of claim 8 , wherein the activated carbon is derived from wood, peat moss, coconut shell, coal, walnut shell, synthetic polymers, and/or natural polymers.

10 . The method of claim 1 , wherein the method further includes a step of desorbing the biogas.

11 . A methane storage and release system comprising:
a container having a gas inlet for receiving a gas stream comprising methane, and an outlet for delivering desorbed methane; and a porous gas sorbent material disposed therein, wherein the porous gas sorbent material includes: <about 100 cc/L volume in pores smaller than about 9 Å size; >about 200 cc/L volume in pores about 9-27 Å size; and >about 50 cc/L volume in pores about 27-490 Å size, wherein the porous gas sorbent material reversibly adsorbs methane from the gas stream.

12 . The system of claim 11 , wherein the porous gas sorbent material further comprises a non-aqueous binder.

13 . The system of claim 12 , wherein the porous gas sorbent material has at least one of the following:
(i) the non-aqueous binder is at least one of a fluoropolymer, a polyamide, a polyimide, fibrillated cellulose, a high-performance plastic, a copolymer with a fluoropolymer, a copolymer with a polyamide, a copolymer with a polyimide, a copolymer with a high-performance plastic, or a combination thereof; (ii) the gas sorbent material is at least one of activated carbon, a zeolite, a silica, a metal organic framework, covalent organic framework, or a combination thereof; or (iii) a combination thereof.

14 . The system of claim 11 , wherein the porous gas sorbent material has at least one of the following:
the gas adsorbing material is present in an amount of at least 90 wt %; the non-aqueous binder is present in an amount no greater than 10 wt %; the non-aqueous binder is a dispersion of about 50 wt % to about 70 wt % of the binder; or a combination thereof.

15 . The system of claim 11 , wherein the porous gas sorbent material has at least one of the following:
the gas sorbent material is present in an amount of at least 93 wt %; the non-aqueous binder is present in an amount no greater than 7 wt %; the non-aqueous binder is a dispersion of about 55 wt % to about 65 wt % of the binder; or a combination thereof.

Assignees

• Ingevity South Carolina Llc

Inventors

• Holbrook Billy-Paul M
• Hiltzik Laurence H
• Mims Robert W
• Bongalonta Rey P
• Onubogu Kenechukwu

Classifications

• F17C2223/035

  High pressure (>10 bar) · CPC title

• F17C2221/033

  Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG · CPC title

• F17C2201/0128

  spherical or elliptical · CPC title

• F17C2201/0104

  cylindrical · CPC title

• F17C11/007 Primary

  for hydrocarbon gases, such as methane or natural gas, propane, butane or mixtures thereof [LPG] · CPC title