Selective removal of carbon monoxide

A reactor for selectively removing carbon monoxide from a gas which comprises:

• a casing having an entrance port, an exit port and a passage therebetween for the movement of said gas from said entrance port to said exit port;
• and
• a catalyst composition in said passage with the formula:
• nN/Ce1−(x+y+z)AxA′yA″zO2−δ
• where A, A′, A″ are independently selected from the group consisting of:
• Zr, Gd, La, Sc, Sr, Co, Cr, Fe, Mn, V, Ti, Cu and Ni;
• N is one or more members of the group consisting of:
• Pt, Pd, and Au;
• n is a weight percent between 0 and 25;
• x, y and z are independently 0 to 0.9;
• x+y+z is 0.1 to 0.9;
• and
• δ is a number which renders the composition charge neutral.

A catalyst composition for selectively removing carbon monoxide from a gas containing hydrogen with the formula:

• nN/Ce1−(x+y+z)AxA′yA″zO2−δ
• where A, A′, A″ are independently selected from the group consisting of:
• Zr, Gd, La, Sc, Sr, Co, Cr, Fe, Mn, V, Ti, Cu and Ni;
• N is one or more members of the group consisting of:
• Pt, Pd, and Au;
• n is a weight percent between 0 and 25;
• x, y and z are independently 0 to 0.9;
• x+y+z is 0.1 to 0.9;
• and
• δ is a number which renders the composition charge neutral, wherein said catalyst composition contains one or more members of the group consisting of:
• copper, manganese and gold.