System for removing carbon monoxide and method for removing...

Details System for removing carbon monoxide and method for removing... System for removing carbon monoxide and method for removing...

2005-07-05

2005-07-05

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon monoxide component

C429S010000, C429S010000, C422S177000, C422S198000, C422S211000

Reexamination Certificate

active

06913738

ABSTRACT:
The object of the present invention is to obtain a carbon-monoxide removing technique capable of very effectively reducing/removing carbon monoxide present at one thousand of ppm to several % in a hydrogen-rich treatment-object gas such as a reformed gas obtained by reforming of a fuel such as natural gas, methanol, etc. to a concentration of several tens of ppm (preferably 10 ppm) or lower without excessive loss of hydrogen, even when carbon dioxide, methane are co-existent For accomplishing this object, there are provided two stages of CO removers for removing carbon monoxide from a hydrogen-containing treatment-object gas, the first-stage CO remover removing a portion of the carbon monoxide by methanation thereof through a catalyst reaction, the second-stage CO remover removing the remaining portion of the carbon monoxide mainly by oxidation thereof through a further catalyst reaction involving addition of an oxidizing agent.

REFERENCES:
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patent: 6183895 (2001-02-01), Kudo et al.
patent: 6190430 (2001-02-01), Fukuoka et al.
patent: 6290913 (2001-09-01), Aoyama
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patent: 10212104 (1998-08-01), None
English Abstract of JP7296837, published Nov. 10, 1995.
English Abstract of JP6283189, published Oct. 7, 1994.

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