Gas storage and dispensing system with monolithic carbon adsorbent
View Patent ↗A pyrolyzed monolith carbon physical adsorbent that is characterized by at least one of the following characteristics: (a) a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 400 grams arsine per liter of adsorbent; (b) at least 30% of overall porosity of the adsorbent including slit-shaped pores having a size in a range of from about 0.3 to about 0.72 nanometer, and at least 20% of the overall porosity including micropores of diameter<2 nanometers; and (c) having a bulk density of from about 0.80 to about 2.0 grams per cubic centimeter, preferably from 0.9 to 2.0 grams per cubic centimeter.
1. A fluid storage and dispensing apparatus, comprising a fluid storage and dispensing vessel with an interior volume in which is disposed an array of articles of pyrolyzed polyvinylidene chloride carbon monolith adsorbent, wherein the articles of pyrolyzed polyvinylidene chloride carbon monolith adsorbent occupies from 75% to 95% of the interior volume, and the adsorbent has (i) a bulk density of from 0.80 to 2.0 g per cubic centimeter of adsorbent, (ii) a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 400 g arsine per liter of adsorbent, and (iii) porosity, at least 80% of which is constituted by pores with diameter<2 nm, and at least 60% of which is constituted by pores having size in a range of from 0.3 to 0.72 nm.
2. The fluid storage and dispensing apparatus of claim 1 , wherein the adsorbent has a bulk density of from 0.9 to 2.0 g per cubic centimeter of adsorbent.
3. The fluid storage and dispensing apparatus of claim 1 , wherein the adsorbent has a bulk density of from 1 to 1.3 g per cubic centimeter of adsorbent.
4. The fluid storage and dispensing apparatus of claim 1 , wherein the adsorbent has a bulk density of from 1.05 to 1.25 g per cubic centimeter of adsorbent.
5. The fluid storage and dispensing apparatus of claim 1 , wherein the adsorbent has a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 450 g arsine per liter of adsorbent.
6. The fluid storage and dispensing apparatus of claim 1 , wherein the adsorbent has a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 500 g arsine per liter of adsorbent.
7. The fluid storage and dispensing apparatus of claim 1 , wherein at least 70% of the porosity of the adsorbent is constituted by pores having size in a range of from 0.3 to 0.72 nm.
8. The fluid storage and dispensing apparatus of claim 1 , wherein the adsorbent is doped with a doping agent to suppress decomposition of sorbate fluid.
9. The fluid storage and dispensing apparatus of claim 1 , wherein the array of articles of pyrolyzed polyvinylidene chloride carbon monolith adsorbent comprises a vertically stacked array of disc-shaped articles of pyrolyzed polyvinylidene chloride carbon monolith adsorbent.
10. The fluid storage and dispensing apparatus of claim 1 , comprising a sorbate fluid sorptively retained on the adsorbent.
11. The fluid storage and dispensing apparatus of claim 10 , wherein the sorbate fluid comprises a hydride fluid, halide fluid or organometallic compound fluid.
12. The fluid storage and dispensing apparatus of claim 10 , wherein the sorbate fluid comprises one of arsine, phosphine, diborane, boron trifluoride, germane, hydrogen selenide and hydrogen telluride.
13. The fluid storage and dispensing apparatus of claim 10 , wherein the sorbate fluid comprises an organometallic compound fluid of a metal selected from the group consisting of barium, strontium, gallium, indium, tungsten, antimony, silver, gold, palladium, gadolinium, and aluminum.
14. A pyrolyzed polyvinylidene chloride carbon monolith adsorbent having (i) a bulk density of from 0.80 to 2.0 g per cubic centimeter of adsorbent, (ii) a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 400 g arsine per liter of adsorbent, and (iii) porosity, at least 80% of which is constituted by pores with diameter<2 nm, and at least 60% of which is constituted by pores having size in a range of from 0.3 to 0.72 nm.
15. The adsorbent of claim 14 , having a bulk density of from 0.9 to 2.0 g per cubic centimeter of adsorbent.
16. The adsorbent of claim 14 , having a bulk density of from 1 to 1.3 g per cubic centimeter of adsorbent.
17. The adsorbent of claim 14 , having a bulk density of from 1.05 to 1.25 g per cubic centimeter of adsorbent.
18. The adsorbent of claim 14 , having a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 450 g arsine per liter of adsorbent.
19. The adsorbent of claim 14 , having a fill density measured for arsine gas at 25° C. and pressure of 650 torr that is greater than 500 g arsine per liter of adsorbent.
20. The adsorbent of claim 14 , at least 70% of the porosity of which is constituted by pores having size in a range of from 0.3 to 0.72 nm.