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1. (WO1999005742) CARBON MONOXIDE REMOVAL METHOD BASED ON A REGENERABLE CO SCAVENGER

Pub. No.:    WO/1999/005742    International Application No.:    PCT/US1998/014851
Publication Date: Feb 4, 1999 International Filing Date: Jul 17, 1998
IPC: B01D 53/04
H01M 8/06
Applicants: EXXON RESEARCH AND ENGINEERING COMPANY
Inventors: BELLOWS, Richard, James
ROBBINS, John, Lawrence
Title: CARBON MONOXIDE REMOVAL METHOD BASED ON A REGENERABLE CO SCAVENGER
Abstract:
The present invention comprises a method for lowering the carbon monoxide content of a CO-containing hydrogen-rich gas stream by contacting the gas stream with a scavenger (21) capable of preferentially oxidizing the carbon monoxide in the gas stream, and then regenerating the scavenger. The scavenger is selected from the group of mixed oxides of manganese and copper; mixed oxides of manganese and copper in combination with mixed oxides of silver, nickel, iron and tin; mixed oxides of tin and copper; SnO2-CuO gels; and mixtures thereof. The scavenger will have a surface area from about 0.5 to about 200 m2/gm. The scavenger is housed in a CO separator (20), which provides the hydrogen to the anode (11) of a fuel cell (10).