Process for recovery of carbon dioxide from flue gas

Details Process for recovery of carbon dioxide from flue gas Process for recovery of carbon dioxide from flue gas

1981-05-21

1982-12-21

Thomas, Earl C.

Chemistry of inorganic compounds

Carbon or compound thereof

Oxygen containing

423219, 423228, 423229, 423239, C01B 3120, B01D 5334

Patent

active

043649157

ABSTRACT:
A process for the recovery of carbon dioxide from a flue gas stream containing residual oxygen is disclosed. A combustible fuel, such as methane, is admixed with the flue gas stream and the flue gas stream is then passed into a combustion zone in which it may be contacted with a catalyst which promotes the consumption of the residual oxygen in a combustion reaction. Preferably, the heat liberated in the combustion reaction is recovered for use in heating flue gas to combustion supporting conditions and in downstream carbon dioxide recovery steps. The purpose of the combustion reaction is to lower the oxygen content of the flue gas stream, which is then contacted with a lean carbon dioxide absorbing amine solution. The low oxygen content reduces the degradation of the amine solution and the corrosiveness of the amine solution thus allowing the use of high strength amine solutions and very high absorbent liquid loadings.

REFERENCES:
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U.S. patent application Ser. No. 491,082 filed Jul. 23, 1974 by Meyer Steinberg entitled "A Combined Coal Fired Process for Production of Power and Liquid Fuel" (available NTIS).
Kirk-Othmer Encyclopedia of Chemical Technology, 2nd edition, vol. 4, pp. 357-369.
Gas Purification, 3rd edition, p. 97, by Arthur L. Kohl et al., published by Gulf Publishing Company, Houston, Tex.

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