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

Cited 25 time in Web of Science Cited 29 time in Scopus
Authors
Kim, Kyung-Yeol; Han, Jonghee; Nam, Suk-Woo; Lim, Tae-Hoon; Lee, Ho-In
Issue Date
2008
Publisher
Elsevier
Citation
Catalysis Today 131 (2008) 431–436
Keywords
Preferential oxidation of COCuO/CeO2Pt-Co/Al2O3Micro-reactorFuel processor
Abstract
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.
ISSN
0920-5861
Language
English
URI
https://hdl.handle.net/10371/61295
DOI
https://doi.org/10.1016/j.cattod.2007.10.076
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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