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

P.V. Snytnikov, M.M. Popova, Y. Men, Evgeny Rebrov, G. Kolb, V. Hessel, J.C. Schouten, V.A. Sobyanin

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Abstract

The activity of a 5-wt% Cu/CeO2-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 degrees 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 degrees 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. (C) 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)53-62
Number of pages10
JournalAPPLIED CATALYSIS A-GENERAL
Volume350
Issue number1
DOIs
Publication statusPublished - 15 Nov 2008

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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    Snytnikov, P. V., Popova, M. M., Men, Y., Rebrov, E., Kolb, G., Hessel, V., Schouten, J. C., & Sobyanin, V. A. (2008). Preferential CO oxidation over a copper-cerium oxide catalyst in a microchannel reactor. APPLIED CATALYSIS A-GENERAL, 350(1), 53-62. https://doi.org/10.1016/j.apcata.2008.07.036