Composite microporous carbons for fuel gas storage
First Claim
1. A microporous carbon adsorbent material which is the product of the pyrolysis of an organic precursor which contains a metal component, said material being suitable for use as a storage media for light gases, and having a uniform pore size distribution of micropores in the range of about 4 to 15 Å
- A, and a total specific surface area greater than about 600 m2 /gm.
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Abstract
A method of making a microporous carbon material which includes providing a precursor selected from the group consisting of crystalline salts of aromatic sulfonates and nonporous polymeric salts. Prior to carbonization, the precursor is treated by ion exchange or other conventional processes to introduce a metal such as iron, nickel and cobalt into the precursor. Heat treatment of such composite precursors in the temperature range of 350° to 850° C. in an inert oxygen free atmosphere for a sufficient time promotes thermally induced hydrogen abstraction and rearrangement of BSUs which result in the formation of a composite, carbonaceous microporous material which contains a metal component, and has a pore size distribution in the range of about 4-15 Å A. The structural and storage characteristics of the microporous carbon materials are also disclosed.
62 Citations
13 Claims
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1. A microporous carbon adsorbent material which is the product of the pyrolysis of an organic precursor which contains a metal component, said material being suitable for use as a storage media for light gases, and having a uniform pore size distribution of micropores in the range of about 4 to 15 Å
- A, and a total specific surface area greater than about 600 m2 /gm.
- View Dependent Claims (2, 3, 4, 5, 6, 12, 13)
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7. A method of making a composite microporous carbon material which comprises;
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(a) providing a polymeric precursor selected from the group consisting of a crystalline aromatic sulfonate which contains a metal component and a nonporous polymeric salt which contains a metal component; and (b) carbonizing said precursor in an oxygen free atmosphere at a temperature in the range of about 350°
to 1000°
C. for a time sufficient to promote thermally induced hydrogen abstraction and rearrangement of basic structural units which result in the formation of a carbonaceous microporous material having a uniform pore size distribution of micropores. - View Dependent Claims (8, 9, 10, 11)
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Specification