US 7,588,742 B2
	Purification of a mixture of H2/CO by catalysis of the NOx
Natacha Haik-Beraud, Nogent sur Marne (France); Serge Moreau, Velizy Villacoublay (France); François Jantet, Amiens (France); and Audrey Moulin, Vincennes (France)
Assigned to L'Air Liquide, Societe Anonyme a Directorie et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, Paris (France)
Appl. No. 10/559,138 PCT Filed Jun. 10, 2004, PCT No. PCT/FR2004/001447 § 371(c)(1), (2), (4) Date Mar. 09, 2007, PCT Pub. No. WO2004/110924, PCT Pub. Date Dec. 23, 2004.
Claims priority of application No. 03 07006 (FR), filed on Jun. 11, 2003.
Prior Publication US 2007/0274891 A1, Nov. 29, 2007
Int. Cl. C01B 3/50 (2006.01); C10K 1/20 (2006.01)

U.S. Cl. 423—239.1  [423/418.2; 423/648.1; 252/373]

11 Claims

1. A method for purifying a gas stream containing hydrogen (H2) and carbon monoxide (CO), and further containing at least one nitrogen oxide (NOx) as impurities, in which the gas stream is contacted with at least one catalyst containing copper and/or palladium, at a temperature of between 100° C. and 200° C., in order to remove at least part of the nitrogen oxide, wherein the catalyst is protected by at least one protective bed located upstream of said catalyst.