Process for removing harmful components from gas

Details Process for removing harmful components from gas Process for removing harmful components from gas

1979-06-01

1981-06-16

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423231, 423237, 423351, 423409, 423648R, B01D 5334

Patent

active

042737486

ABSTRACT:
A reducing gas, such as a synthetic fuel gas, produced by gasification of a fossil fuel, containing ammonia or both ammonia and hydrogen sulfide, is purified by passing the reducing gas at first, through a first removing agent of iron or nickel system when the hydrogen sulfide is contained, and then through a second removing agent of iron or nickel system, both at elevated temperatures. For example, when the reducing gas contains both ammonia and hydrogen sulfide, the gas is passed through the first removing agent at a temperature of 450.degree.-700.degree. C. to remove substantially all of the hydrogen sulfide and then is passed through the second removing agent at a temperature of greater than 700.degree. C., preferably up to 900.degree. C., to remove substantially all of the ammonia contained in the gas. Not only a remarkable effect upon prevention of environmental pollution but also a great improvement of energy efficiency, as compared with the conventional process, can be obtained.

REFERENCES:
patent: 1128843 (1915-02-01), Bosch et al.
patent: 2551905 (1951-05-01), Robinson
patent: 2837398 (1958-06-01), Grosskinsky et al.
patent: 2979384 (1961-04-01), Weiner et al.
patent: 3661507 (1972-05-01), Breitbach et al.
patent: 3773912 (1973-11-01), Spangler, Jr.
patent: 3974256 (1976-08-01), Wheelock et al.
Jacobson, "Encyclopedia of Chemical Reactions" vol. IV, Reinhold Publishing Co., New York, 1951, p. 103.

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