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

doi:10.1016/j.cattod.2007.10.076

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 journal › Article › peer-review

31 Citations (Scopus)

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.

Original language	English
Pages (from-to)	431-436
Number of pages	6
Journal	Catalysis Today
Volume	131
Issue number	1-4
DOIs	https://doi.org/10.1016/j.cattod.2007.10.076
Publication status	Published - 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).

Keywords

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

ASJC Scopus subject areas

Catalysis
General Chemistry

Access to Document

10.1016/j.cattod.2007.10.076

Cite this

@article{fbcaf6e42b76453895a653cfc0894076,

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

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.",

keywords = "CuO/CeO, Fuel processor, Micro-reactor, Preferential oxidation of CO, Pt-Co/AlO",

author = "Kim, {Kyung Yeol} and Jonghee Han and Nam, {Suk Woo} and Lim, {Tae Hoon} and Lee, {Ho In}",

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).",

year = "2008",

month = feb,

day = "29",

doi = "10.1016/j.cattod.2007.10.076",

language = "English",

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T1 - Preferential oxidation of CO over CuO/CeO2 and Pt-Co/Al2O3 catalysts in micro-channel reactors

AU - Kim, Kyung Yeol

AU - Han, Jonghee

AU - Nam, Suk Woo

AU - Lim, Tae Hoon

AU - Lee, Ho In

N1 - 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).

PY - 2008/2/29

Y1 - 2008/2/29

N2 - 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.

AB - 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.

KW - CuO/CeO

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KW - Preferential oxidation of CO

KW - Pt-Co/AlO

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