High capacity adsorbent for oxygen storage at cryogenic temperature

• US 6,656,878 B2
• Filed: 03/23/2001
• Issued: 12/02/2003
• Est. Priority Date: 03/09/1998
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Chang, Chin-Hsiung
• Primary Examiner(s): Hendrickson, Stuart L.
• Application Number:
  US09/816,854
• Publication Number:
  US 20010019994A1
• Time in Patent Office: 984 Days
• Field of Search: 502/416, 502/418, 423/445.R
• US Class Current: 502/416
• CPC Class Codes: B01D 2253/306 Surface area, e.g. BET-specific surface
• CPC Class Codes: B01D 2253/308 Pore size
• CPC Class Codes: B01D 2253/311 Porosity, e.g. pore volume
• CPC Class Codes: B01D 2256/12 Oxygen
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2257/80 Water
• CPC Class Codes: B01D 2259/416 involving cryogenic temperature treatment
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/053 with storage or buffer vessel
• CPC Class Codes: B01J 20/20 comprising free carbon; comprising carbon obtained by carbonising processes
• CPC Class Codes: B01J 20/28066 being more than 1000 m2/g
• CPC Class Codes: B01J 20/28073 being in the range 0.5-1.0 ml/g
• CPC Class Codes: B01J 20/2808 being less than 2 nm, i.e. micropores or nanopores
• CPC Class Codes: B01J 20/3078 Thermal treatment, e.g. calcining or pyrolizing
• CPC Class Codes: B29K 2027/08 PVDC, i.e. polyvinylidene chloride
• CPC Class Codes: B29K 2427/08 PVDC, i.e. polyvinylidene chloride
• CPC Class Codes: Y02C 20/40 of CO2
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

An oxygen storage adsorbent at cryogenic temperatures that will remove carbon dioxide and water comprises a carbonized precursor material having functional sites that adsorb and store oxygen and that evolve oxygen upon adsorbing carbon dioxide and water. The adsorbent is characterized by a total pore volume of between about 0.5 to 0.6 cm³/g, a median pore diameter between about 0.42 to 0.46 nm, and a BET surface area between about 1000 to 1200 m²/g.

Claims

1. An oxygen storage adsorbent, comprising:

a carbonized precursor material having functional sites that adsorb said oxygen, said precursor material being characterized by a diameter between about 0.08 to 0.10 inches, a length between about 0.08 to 0.10 inches, a weight between about 0.006 to 0.008 grams, a piece density between about 0.8 to 1.1 g/cm³, a median pore diameter between about 0.42 to 0.46 nm, and a chemical structure essentially free from oxygen atoms.

2. The adsorbent of claim 1, wherein said carbonized precursor material is further characterized by total pore volume of between about 0.5 to 0.6 cm³/g.

3. The adsorbent of claim 1, wherein said carbonized precursor material is further characterized by a BET surface area between about 1000 to 1200 m²/g.

4. The adsorbent of claim 1, wherein said adsorbent is characterized by a oxygen adsorption capacity between about 50 to 70 wt./wt. % at a temperature of about −

180 to −

190°

C. and a pressure of about 1 to 200 mm Hg.

5. The adsorbent of claim 1, wherein said adsorbent is characterized by a carbon dioxide adsorption capacity between about 18 to 40 wt./wt. % at a temperature of about −

75 to −

85°

C. and a pressure of about 1 to 5 mm Hg.

6. A oxygen storage adsorbent, comprising:

a carbonized precursor material having sites that adsorb oxygen and evolve said oxygen upon adsorbing carbon dioxide and water,

whereby said adsorbent is characterized by a total pore volume of between about 0.5 to 0.6 cm³/g, a median pore diameter between about 0.42 to 0.46 nm, and a BET surface area between about 1000 to 1200 m²/g; and

whereby said carbonized precursor material has a chemical structure essentially free from oxygen atoms.

7. The adsorbent of claim 6, wherein said carbonized precursor material is further characterized by a diameter between about 0.08 to 0.10 inches.

8. The adsorbent of claim 6, wherein said carbonized precursor material is further characterized by a length between about 0.08 to 0.10 inches.

9. The adsorbent of claim 6, wherein said carbonized precursor material is further characterized by a weight between about 0.006 to 0.008 grams.

10. The adsorbent of claim 6, wherein said carbonized precursor is further characterized by a packing density between about 0.6 to 0.8 g/cm³.

11. The adsorbent of claim 6, wherein said carbonized precursor material is further characterized by total pore volume of between about 0.5 to 0.6 cm³/g.

12. The adsorbent of claim 6, wherein said carbonized precursor material is further characterized by a median pore diameter between about 0.42 to 0.46 nm.

13. A method of making a oxygen storage adsorbent, comprising:

polymerizing a monomer to produce a precursor material;

carbonizing said precursor material to produce a carbonized precursor material;

whereby said adsorbent is characterized by a oxygen adsorption capacity between about 50 to 70 wt./wt. %, as well as a carbon dioxide adsorption capacity between about 18 to 40 wt./wt. %, at a pressure of about 1 to 5 mm Hg for CO₂25 mm Hg for water, and a temperature of about −

80 to −

190°

C.;

whereby said adsorbent is further characterized by a median pore diameter between about 0.42 to 0.46 nm.

14. An oxygen storage adsorbent made according to the process of claim 13.

15. The method of claim 13, wherein said carbonized precursor material is characterized by a diameter between about 0.08 to 0.10 inches.

16. The adsorbent of claim 13, wherein said carbonized precursor material is characterized by a length between about 0.08 to 0.10 inches.

17. The adsorbent of claim 13, wherein said carbonized precursor material is characterized by a weight between about 0.006 to 0.008 grams.

18. The adsorbent of claim 13, wherein said carbonized precursor material is characterized by a piece density between about 0.8 to 1.1 g/cm³.

19. The method of claim 13, wherein said adsorbent is further characterized by a total pore volume between about 0.5 to 0.6 cm³/g.

20. The oxygen storage adsorbent according to claim 14, wherein said carbonized precursor material is characterized by a diameter between about 0.08 to 0.10 inches, a weight between about 0.006 to 0.008 grams, a piece density between about 0.8 to 1.1 g/cm³, and a total pore volume between about 0.5 to 0.6 cm³/g.

21. The method of claim 13, wherein said adsorbent is further characterized by a BET surface area between about 1000 to 1200 m²/g.