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Selective oxidation of carbon monoxide over CuO–CeO2 catalyst: Effect of hydrothermal treatment

Cited 52 time in Web of Science Cited 54 time in Scopus
Authors
Jung, Chang Ryul; Kundu, Arunabha; Nam, Suk-Woo; Lee, Ho-In
Issue Date
2008
Publisher
Elsevier
Citation
Applied Catalysis B: Environmental 84 (2008) 426–432
Keywords
CuO–CeO2 catalystHydrothermal treatmentCu–Ce–O solid solutionSelective oxidation of COPhase separationCopperCeria
Abstract
Copper oxide–ceria (CuO–CeO2) catalyst for selective oxidation of carbon monoxide (CO) was prepared
by co-precipitation and hydrothermal treatment methods and evaluated for catalytic activity in a
reformate gas composition which simulated the produced gas from methanol steam reforming. By
applying the condition of hydrothermal treatment, the catalytic activity of CuO–CeO2 catalyst was
increased and the operating temperature window, in which the concentration of carbon monoxide was
lower than 10 ppm, was widened. From the thermogravimetric (TG) results of hydrothermally treated
catalyst precursor, CuO–CeO2 catalyst did not show any improvement in physical properties such as
Brunauer Emmett Teller (BET) surface area, pore volume and average pore diameter, but the chemical
stability might be enhanced by hydrothermal treatment. By hydrothermal treatment, cuprous ion in the
CuO–CeO2 catalyst migrated to the surface of catalyst resulting in increased surface concentration of
copper and formation of cupric oxide on the surface of catalyst during calcination. While increasing the
calcination temperature (i.e. above 800 8C), the phase separation occurred with a part of copper and
cupric oxide was formed on the surface of catalyst which was observed in X-ray diffraction (XRD)
analysis.
ISSN
0926-3373
Language
English
URI
https://hdl.handle.net/10371/61287
DOI
https://doi.org/10.1016/j.apcatb.2008.04.024
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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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