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U.S. Department of Energy
Office of Scientific and Technical Information

Purification of gas mixtures

Patent ·
OSTI ID:5167347
The invention concerns a process for the purification of a hydrogen-containing gas mixture comprising up to 45% by volume of hydrogen, together with carbon oxides, hydrogen cyanide and impurities including nitrogen oxides and/or oxygen. The process comprises passing the gas over a sulphur-resistant hydrogenation catalyst at a temperature of from 120 to 250/sup degrees/ C and at a pressure of from 0.5 to 250 bar to remove the nitrogen oxides and/or oxygen therefrom while substantially avoiding hydrogen cyanide removal. The gas may be obtained from a koppers-totzek gasifier and may be used for the production of ammonia after further purification. The sulphur-resistant catalyst may be a nickel molybdate or cobalt molybdate catalyst or a metal from group vi and/or group viii of the periodic table.
Assignee:
Aeci Ltd (South Africa)
Patent Number(s):
US 4320100
OSTI ID:
5167347
Country of Publication:
United States
Language:
English