Use of nitrogen from an air separation plant in carbon dioxide r

Details Use of nitrogen from an air separation plant in carbon dioxide r Use of nitrogen from an air separation plant in carbon dioxide r

1995-10-04

1996-12-10

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

60 3912, 62648, 62928, F25J 300

Patent

active

055820298

ABSTRACT:
A cryogenic air separation unit (ASU) provides flows of oxygen and nitrogen. The oxygen is used in a process such as COREX iron making or the partial oxidation of hydrocarbons, or in an oxycoal fuelled blast furnace, producing an off-gas containing useful components (H.sub.2 and CO) and carbon dioxide. The carbon dioxide is removed by pressure swing adsorption using nitrogen from the ASU as a regeneration gas and the purified off-gas becomes a feed gas to a further process such as production of iron by direct reduction of iron ore or the production of a NH.sub.3 making ammonia or is recycled into the first process as a feed gas.

REFERENCES:
patent: 3236059 (1966-02-01), Bernstein
patent: 4250704 (1981-02-01), Bruckner
patent: 4367082 (1983-01-01), Tomisaka et al.
patent: 4372764 (1983-02-01), Theobald
patent: 4806136 (1989-02-01), Kiersz et al.
patent: 5080703 (1992-01-01), Rathbone
patent: 5090973 (1992-02-01), Jain
The COREX.COPYRGT.-DR Connection leaflet.

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