Carbon-based compositions with highly efficient volumetric gas sorption
The present application is generally directed to gas storage materials such as activated carbon comprising enhanced gas adsorption properties. The gas storage materials find utility in any number of gas storage applications. Methods for making the gas storage materials are also disclosed.
1. A carbon material comprising a compression density of at least 0.7 g/cm 3 and at least 170 v/v, wherein:
compression density is a density of the carbon material after applying a force to the carbon material; and
v/v represents a unit volume of gas which can be stored per unit volume of the carbon material.
2. The carbon material of claim 1 , wherein the carbon material comprises at least 180 v/v.
3. The carbon material of claim 1 , wherein the carbon material comprises a compression density of at 0.8 g/cm 3 .
4. The carbon material of claim 1 , wherein the carbon material comprises at least 200 v/v.
5. A gas storage device comprising the carbon material of claim 1 .
6. The device of claim 5 , wherein the gas comprises methane, ethane, hydrogen, natural gas, or any combinations thereof.
7. The device of claim 5 , wherein the gas storage capacity retention at 1000 cycles is 80% or greater.
8. A monolith comprising the carbon material of claim 1 .
9. The carbon material of claim 1 , wherein the carbon material comprises carbon particles having a tap density of 0.5 g/cm 3 or greater, a surface area of 1000 m 2 /g or greater, a total pore volume of 0.5 cm3/g or greater, and a gravimetric methane adsorption of 0.10 g/g or greater.
10. The carbon material of claim 9 , wherein the carbon particles have a tap density of 0.6 g/cm 3 or greater, a surface area of 1500 m 2 /g or greater, a total pore volume of 0.7 cm 3 /g or greater, and a gravimetric methane adsorption of 0.12 g/g or greater.
11. The carbon material of claim 1 , wherein the carbon material comprises a total pore volume and from 1-40% of the total pore volume resides in mesopores and from 1-50% of the total pore volume resides in macropores.
12. The carbon material of claim 1 , wherein the carbon material comprises carbon particles, and a volume average particle size (Dv,50) of the plurality of carbon particles is between 0.1 um and 50 mm.
13. The carbon material of claim 1 , wherein the carbon material comprises a plurality of carbon particles, and wherein:
from 5%-30% of the plurality of carbon particles have a surface area below 1500 m 2 /g;
from 10%-80% of the plurality of carbon particles have a surface area of from 1500 m 2 /g to 1800 m 2 /g; and
from 5-30% of the plurality of carbon particles have a surface area greater than 1800 m 2 /g.
14. The carbon material of claim 1 , wherein the carbon material comprises a plurality of carbon particles, and wherein:
from 20-80% of the plurality of carbon particles have a surface area of 1600 m 2 /g or lower; and
from 20-80% of the plurality of carbon particles have surface area of 2000 m 2 /g or higher.