Gaseous storage system, methods for making and using the same
The present description relates to an adsorbent monolith, method to make the adsorbent monolith, and a gaseous storage system that includes an adsorbent monolith according to the present disclosure. In particular, the adsorbent monolith includes adsorbent, a binder, and a scaffold material.
1. A porous gas sorbent monolith, comprising an admixture of:
activated carbon adsorbent in an amount of from about 85 wt % to about 95 wt %, and having for pores of less than 25 Å a pore volume of about 0.3 cc/g or greater;
a polymer binder selected from the group consisting of a methylcellulose, an alginate, a fluoropolymer, and a combinations thereof, in an amount of from about 5 wt % to about 13 wt %; and
a polymer fiber scaffold material selected from the group consisting of a polyester fiber, polylactic acid fiber, a nylon fiber and a combination thereof, in an amount of from about 1 wt % to about 2 wt %,
wherein the porous gas sorbent monolith has a side of at least about 88.9 mm and a height of from about 19.05 mm to about 254 mm, and upon drying at a temperature of from 110° C. to about 180° C. the polymer binder and polymer fiber scaffold material retain their original structure, and wherein the porous gas sorbent monolith has a natural gas activity (NG Act) of from 11.3 to 15.1 g/100 g and a toughness of greater than 17 kN/m 2 .
2. The monolith of claim 1 , wherein the polymer fiber scaffold material includes a nylon fiber.
3. The monolith of claim 1 , wherein the polymer fiber scaffold material includes a polyester fiber.
4. The monolith of claim 1 , wherein the monolith drying temperature is from about 110° C. to about 150° C.
5. The monolith of claim 4 , wherein the drying temperature is about 165° C.
6. The monolith of claim 1 , wherein the polymer fiber scaffold material has a glass transition temperature (T g ) in a range of about 200° C. to about 270° C.
7. The monolith of claim 6 , wherein the T g of the polymer fiber scaffold material is 250° C.
8. The monolith of claim 1 , wherein the polymer binder is at least one of carboxymethylcellulose, hydroxypropylmethylcellulose, sodium alginate, polytetrafluoroethylene or a combination thereof.
9. A gaseous hydrocarbon storage system comprising:
a container; and
a porous gas sorbent monolith of claim 1 .
10. The gaseous hydrocarbon storage system of claim 9 , wherein the container is configured to withstand at least 1,000 psi.