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Structural Characteristics of (NiMgAl)Ox Prepared from a Layered Double Hydroxide Precursor and its Application in Direct Internal ReformingMolten Carbonate Fuel Cells

Cited 12 time in Web of Science Cited 12 time in Scopus
Authors
Park, Kyoungil; Lu, Lianhai; Lim, Tae-Hoon; Hong, Seong-Ahn; Lee, Ho-In
Issue Date
2007
Publisher
Wiley-Blackwell
Citation
Fuel Cells 2007, 7, 211-217
Keywords
Al/Mg Molar RatioDIR-MCFCLayered Double Hydroxide (LDH)Methane Steam ReformingNi Catalyst
Abstract
(NiMgAl)Ox materials prepared from layered double hydroxide
(LDH) precursors show a typical mesoporous structure
with an average pore size of about 6 nm, excellent activity
for the methane steam reforming (MSR) reaction at 650 °C,
and a strong resistance against Li poisoning, suggesting the
possibility for future application in direct internal reforming
molten carbonate fuel cells (DIR-MCFC). X-ray diffraction
(XRD) experiments indicate that the molar ratio of Al/Mg
exerts a strong effect on the properties of both the LDH precursors
and final catalysts. Temperature-programmed
reduction (TPR) analysis reveals that the Al/Mg molar ratio
influences the properties of Ni in the final catalyst. The
catalytic performance of the catalysts prepared is greatly
influenced by the molar ratio of Al/Mg for MSR. The activity gradually increases with an increase in the Al/Mg ratio
(0.14–1.5). However, with further increases in the amount of
Al added (Al/Mg = 2), the activity decreases. The activity is
strongly related to the BET surface area and Ni dispersion.
The Li-poisoning test proves that Mg-rich catalysts lose their
activity quickly upon exposure to Li, while Al-rich catalysts
maintain virtually all of their original activity. NiMgAl
(Al/Mg = 1.5) is found to be an excellent catalyst for the
DIR-MCFC, having both the highest activity and strongest
resistance against Li poisoning.
ISSN
1615-6846
Language
English
URI
https://hdl.handle.net/10371/61299
DOI
https://doi.org/10.1002/fuce.200600003
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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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