Preferential CO oxidation over a copper–cerium oxide catalyst in a microchannel reactor

• Published in: Applied catalysis. A, General Vol. 350; no. 1; pp. 53 - 62
• Main Authors: Snytnikov, P.V., Popova, M.M., Men, Y., Rebrov, E.V., Kolb, G., Hessel, V., Schouten, J.C., Sobyanin, V.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-11-2008
• Subjects: CO removal; Copper–ceria oxide catalyst; Hydrogen purification; Microchannel reactor; Preferential CO oxidation; Selective oxidation of carbon monoxide; CO removal; Copper–ceria oxide catalyst; Preferential CO oxidation; Hydrogen purification; Microchannel reactor; Selective oxidation of carbon monoxide
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2008.07.036

The activity of a 5
wt% Cu/CeO
2−
x
catalyst during preferential CO oxidation in hydrogen-rich gas mixtures was studied in a microchannel reactor. An increase of the O
2 concentration from a 1.2 to 3 fold excess reduced the CO concentration to 10
ppm in a broad temperature interval of 50
°C at weight hour space velocity (WHSV) up to 275,000
cm
3
g
−1
h
−1. The preferential CO oxidation could be carried out at higher flow rates and at higher selectivities in the microchannel reactor compared to a fixed-bed flow reactor.
▪
The activity of a 5-wt% Cu/CeO
2−
x
catalyst during preferential CO oxidation in hydrogen-rich gas mixtures was studied in a microchannel reactor. The CO concentration dropped from 1
vol.% to 10
ppm at a selectivity of 60%, at a temperature of 190
°C, and a weight hour space velocity (WHSV) of 55,000
cm
3
g
−1
h
−1. Both the CO concentration and the temperature increased when the WHSV was increased from 50,000 to 500,000
cm
3
g
−1
h
−1. An increase of the O
2 concentration from a 1.2 to 3 fold excess reduced the CO concentration to 10
ppm in a broad temperature interval of 50
°C at WHSVs up to 275,000
cm
3
g
−1
h
−1. The preferential CO oxidation could be carried out at higher flow rates and at higher selectivities in the microchannel reactor compared to a fixed-bed flow reactor.