Carbon dioxide production from combustion exhaust gases with nit

Details Carbon dioxide production from combustion exhaust gases with nit Carbon dioxide production from combustion exhaust gases with nit

1990-07-31

1992-03-31

Capossela, Ronald C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

55 66, 55 75, 62 22, 62 24, 423242, 423247, C01B 2100

Patent

active

051006359

ABSTRACT:
The present invention is directed to a method for producing carbon dioxide and nitrogen from combustion exhaust gas containing less than about 10% oxygen by weight which comprises the steps of (a) treating the exhaust gas to remove particulate matter, (b) compressing the exhaust gas to a pressure in the range from about 25 psia to about 200 psia, (c) purifying the exhaust gas to remove trace contaminants, (d) separating the exhaust gas to produce a carbon dioxide rich fraction and a nitrogen rich fraction, (e) liquifying the carbon dioxide rich fraction and distilling off volatile contaminants to produce pure carbon dioxide, (f) purifying the nitrogen rich fraction to remove contaminants, and (g) cryogenically fractionally distilling the nitrogen rich fraction to produce pure nitrogen. In another embodiment, the invention is directed to a method for producing carbon dioxide, nitrogen, and argon from a combustion exhaust gas. The combustion exhaust gas in the present invention may be obtained from an ammonia plant reformer furnace and the nitrogen produced may be employed as a synthesis gas in the ammonia reactor.

REFERENCES:
patent: 3498067 (1970-03-01), Ranke
patent: 4371381 (1983-02-01), Schuftan
patent: 4595404 (1986-06-01), Ozero et al.
patent: 4704146 (1987-11-01), Markbretter et al.
patent: 4759786 (1988-07-01), Atkinson et al.
patent: 4952223 (1990-08-01), Krishnamurthy et al.

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