Preferential oxidation of CO over CuO/CeO2 and Pt-Co/Al2O3 catalysts in micro-channel reactors

Kyung Yeol Kim, Jonghee Han, Suk Woo Nam, Tae Hoon Lim, Ho In Lee

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Micro-channel plates with dimension of 1 mm × 0.3 mm × 48 mm were prepared by chemical etching of stainless steel plates followed by wash coating of CeO2 and Al2O3 on the channels. After coating the support on the plate, Pt, Co, and Cu were added to the plate by incipient wetness method. Reaction experiments of a single reactor showed that the micro-channel reactor coated with CuO/CeO2 catalyst was highly selective for CO oxidation while the one coated with Pt-Co/Al2O3 catalyst was highly active for CO oxidation. The 7-layered reactors coated with two different catalysts were prepared by laser welding and the performances of each reactor were tested in large scale of PROX conditions. The multi-layered reactor coated with Pt-Co/Al2O3 catalyst was highly active for PROX and the outlet concentration of CO gradually increased with the O2/CO ratio due to the oxidation of H2 which maintained the reactor temperature. The multi-layered reactor coated with CuO/CeO2 showed lower catalytic activity than that coated with Pt catalyst, but its selectivity was not changed with the increase of O2/CO ratios due to the high selectivity. In order to combine advantages (high activity and high selectivity) of the two individual catalysts (Pt-Co/Al2O3, CuO/CeO2), a serial reactor was prepared by connecting the two multi-layered micro-channel reactors with different catalysts. The prepared serial reactor exhibited excellent performance for PROX.

Original languageEnglish
Pages (from-to)431-436
Number of pages6
JournalCatalysis Today
Issue number1-4
Publication statusPublished - 2008 Feb 29

Bibliographical note

Funding Information:
This work was financially supported by the Seoul R&BD Program through Korea Institute of Science and Technology and by the ERC Program of MOST/KOSEF (Grant No. R11-2002-102-00000-0).


  • CuO/CeO
  • Fuel processor
  • Micro-reactor
  • Preferential oxidation of CO
  • Pt-Co/AlO

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry


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