Highly-Dispersed Ni-NiO Nanoparticles Anchored on an SiO2 Support for an Enhanced CO Methanation Performance

Highly-dispersed Ni-NiO nanoparticles was successfully anchored on an SiO2 support via a one-pot synthesis and used as heterogeneous catalysts for CO methanation. The as-obtained Ni-NiO/SiO2 catalyst possessed a high Ni content of 87.8 wt.% and exhibited a large specific surface area of 71 m2g−1 wit...

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Bibliographic Details
Published inCatalysts Vol. 9; no. 6; p. 506
Main Authors Li, Jiangwei, Li, Panpan, Li, Jiangbing, Tian, Zhiqun, Yu, Feng
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2019
Subjects
Adsorption
Carbon monoxide
Catalysts
Chemical reactions
Chemical synthesis
CO methanation
Dispersion
Hydrogen
Methanation
Nanoparticles
Natural gas
Ni-NiO nanoparticles
Nickel oxides
nickel-based catalyst
Selectivity
Silicon dioxide
Stability tests
syngas
synthetic natural gas
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Summary:Highly-dispersed Ni-NiO nanoparticles was successfully anchored on an SiO2 support via a one-pot synthesis and used as heterogeneous catalysts for CO methanation. The as-obtained Ni-NiO/SiO2 catalyst possessed a high Ni content of 87.8 wt.% and exhibited a large specific surface area of 71 m2g−1 with a main pore diameter of 16.7 nm. Compared with an H2-reduced Ni-NiO/SiO2 (i.e., Ni/SiO2) catalyst, the Ni-NiO/SiO2 displayed a superior CO methanation performance. At the temperature of 350 °C, the Ni-NiO/SiO2 showed a CO conversion of 97.1% and CH4 selectivity of 81.9%, which are much better values than those of Ni/SiO2. After a 50-h stability test, the Ni-NiO/SiO2 catalyst still had an overwhelming stability retention of 97.2%, which was superior to the 72.8% value of the Ni/SiO2 catalyst.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal9060506