Methane Combustion Over Ni/CexZr1–xO2 Catalysts: Impact of Ceria/Zirconia Ratio

A series of CexZr1–xO2 (x=1, 0.83, 0.17, 0) supports and 2 wt.% Ni/CexZr1–xO2 catalysts were synthesized and evaluated for CH4 oxidation. The CexZr1–xO2 supports showed moderate activity (T50=519‐638 °C) with CO by‐product formation. Nickel incorporation onto CexZr1–xO2 lowered the T50 to 438–477 °C...

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Bibliographic Details
Published in:ChemCatChem 2020-11, Vol.12 (21), p.5558-5568
Main Authors: Chen, Junjie, Carlson, Benjamin D., Toops, Todd J., Li, Zhenglong, Lance, Michael J., Karakalos, Stavros G., Choi, Jae‐Soon, Kyriakidou, Eleni A.
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysts
ceria-zirconia
Cerium oxides
Chemical synthesis
Combustion
Doping
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Low temperature
Methane
Nickel
Oxidation
oxygen storage capacity
redox properties
Stability tests
Storage capacity
Zirconium dioxide
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Summary:A series of CexZr1–xO2 (x=1, 0.83, 0.17, 0) supports and 2 wt.% Ni/CexZr1–xO2 catalysts were synthesized and evaluated for CH4 oxidation. The CexZr1–xO2 supports showed moderate activity (T50=519‐638 °C) with CO by‐product formation. Nickel incorporation onto CexZr1–xO2 lowered the T50 to 438–477 °C and eliminated the formation of CO. The results indicated that moderate Zr doping improved the support oxygen storage capacity (OSC) and reducibility of the catalyst at low temperatures (H2‐TPR) leading to an enhanced CH4 combustion turnover frequency: Ni/ZrO2
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.202000947