TY - JOUR
T1 - Lanthanide oxide modified nickel supported on mesoporous silica catalysts for dry reforming of methane
AU - Li, Bin
AU - Yuan, Xiaoqing
AU - Li, Lvyin
AU - Li, Baitao
AU - Wang, Xiujun
AU - Tomishige, Keiichi
N1 - Funding Information:
This research was supported by the National Natural Science Foundation of China ( 21673079 , 21872056 ), Natural Science Foundation of Guangdong Province ( 2021A1515010149 ), Guangzhou Municipal Science and Technology Project ( 20180410116 ) and Science and Technology Planning Project of Guangdong Province ( 2015A020216002 ).
Publisher Copyright:
© 2021 Hydrogen Energy Publications LLC
PY - 2021/9/8
Y1 - 2021/9/8
N2 - Addition of rare earth oxide, especially lanthanide oxide, was regarded as a promising strategy to improve the carbon resistance for Nickel-based catalysts in dry reforming of methane (DRM). In this work, Nickel-based catalysts containing lanthanide oxides (NiLa/SiO2, NiCe/SiO2, NiSm/SiO2, and NiGd/SiO2) were prepared and employed to catalyze DRM. Lanthanide oxide affected the formation of Ni nanoparticles in different size. In NiLa/SiO2 and NiCe/SiO2, Ni nanoparticles maintained relatively small size (4 nm), while in NiSm/SiO2 and NiGd/SiO2, nickel particles were in large size (8 nm). NiLa/SiO2 and NiCe/SiO2 exhibited better stability than the other two catalysts, with CH4 conversion decreasing from 64.6 to 57.6% and 61.6 to 60.3%, respectively in 10 h on stream. The kinetic study confirmed that adding lanthanide oxide significantly affected the activation energy of CH4 dissociation and CO2 dissociation. Compared to monometallic Ni/SiO2, the presence of Sm and Gd suppressed CO2 dissociation, and introduction of Ce and La effectively promoted CO2 dissociation. These characters contributed to the higher carbon resistance and good stability for NiLa/SiO2 and NiCe/SiO2 catalysts in DRM reaction.
AB - Addition of rare earth oxide, especially lanthanide oxide, was regarded as a promising strategy to improve the carbon resistance for Nickel-based catalysts in dry reforming of methane (DRM). In this work, Nickel-based catalysts containing lanthanide oxides (NiLa/SiO2, NiCe/SiO2, NiSm/SiO2, and NiGd/SiO2) were prepared and employed to catalyze DRM. Lanthanide oxide affected the formation of Ni nanoparticles in different size. In NiLa/SiO2 and NiCe/SiO2, Ni nanoparticles maintained relatively small size (4 nm), while in NiSm/SiO2 and NiGd/SiO2, nickel particles were in large size (8 nm). NiLa/SiO2 and NiCe/SiO2 exhibited better stability than the other two catalysts, with CH4 conversion decreasing from 64.6 to 57.6% and 61.6 to 60.3%, respectively in 10 h on stream. The kinetic study confirmed that adding lanthanide oxide significantly affected the activation energy of CH4 dissociation and CO2 dissociation. Compared to monometallic Ni/SiO2, the presence of Sm and Gd suppressed CO2 dissociation, and introduction of Ce and La effectively promoted CO2 dissociation. These characters contributed to the higher carbon resistance and good stability for NiLa/SiO2 and NiCe/SiO2 catalysts in DRM reaction.
KW - Carbon deposition
KW - Dry reforming of methane
KW - Kinetic study
KW - Lanthanide oxides
KW - Nickel catalysts
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U2 - 10.1016/j.ijhydene.2021.07.056
DO - 10.1016/j.ijhydene.2021.07.056
M3 - Article
AN - SCOPUS:85111975008
SN - 0360-3199
VL - 46
SP - 31608
EP - 31622
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 62
ER -
