TY - JOUR
T1 - Effect of surface properties controlled by Ce addition on CO2 methanation over Ni/Ce/Al2O3 catalyst
AU - Kim, Min Jae
AU - Youn, Jae Rang
AU - Kim, Hye Jeong
AU - Seo, Myung Won
AU - Lee, Doyeon
AU - Go, Kang Seok
AU - Lee, Ki Bong
AU - Jeon, Sang Goo
N1 - Funding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No.2019281010007B).
Funding Information:
Funding was received for this work. All of the sources of funding for the work described in this publication are acknowledged below: Korea Institute of Energy Technology Evaluation and Planning, Ministry of Trade, Industry & Energy of the Republic of Korea.This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No.2019281010007B).
Publisher Copyright:
© 2020 Hydrogen Energy Publications LLC
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/9/21
Y1 - 2020/9/21
N2 - Ce-promoted Ni/Al2O3 catalysts with Ce contents of 0, 5, 10, 15, and 20 wt% were investigated for CO2 methanation. Ni/15Ce/Al2O3 showed good selectivity and catalytic performance in CO2 methanation and remained stable at 350 °C for 80 h with minor fluctuations. Interactions between Ni and the Ce/Al2O3 support was characterized using X-ray diffraction, temperature-programmed reduction of H2, temperature-programmed desorption of CO2, X-ray photoelectron spectroscopy, Raman spectroscopy, and thermogravimetric analysis. Addition of Ce did not increase the catalytic surface area, which can significantly enhance the heterogeneous catalytic activity. However, XPS analysis showed that the Ce on the Ni/Al2O3 catalyst changed the surface electron states of Ni, Ce, and O. Additionally, CO2 adsorption/desorption was confirmed to be related to the amount of Ce present on Ni/Al2O3 by TGA and CO2-TPD. The Ce addition thus played an important role in determining the CO2 adsorption, desorption, and conversion.
AB - Ce-promoted Ni/Al2O3 catalysts with Ce contents of 0, 5, 10, 15, and 20 wt% were investigated for CO2 methanation. Ni/15Ce/Al2O3 showed good selectivity and catalytic performance in CO2 methanation and remained stable at 350 °C for 80 h with minor fluctuations. Interactions between Ni and the Ce/Al2O3 support was characterized using X-ray diffraction, temperature-programmed reduction of H2, temperature-programmed desorption of CO2, X-ray photoelectron spectroscopy, Raman spectroscopy, and thermogravimetric analysis. Addition of Ce did not increase the catalytic surface area, which can significantly enhance the heterogeneous catalytic activity. However, XPS analysis showed that the Ce on the Ni/Al2O3 catalyst changed the surface electron states of Ni, Ce, and O. Additionally, CO2 adsorption/desorption was confirmed to be related to the amount of Ce present on Ni/Al2O3 by TGA and CO2-TPD. The Ce addition thus played an important role in determining the CO2 adsorption, desorption, and conversion.
KW - CO adsorption
KW - CO methanation
KW - Cerium
KW - Defect oxygen
KW - Nickel
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U2 - 10.1016/j.ijhydene.2020.06.144
DO - 10.1016/j.ijhydene.2020.06.144
M3 - Article
AN - SCOPUS:85089290810
SN - 0360-3199
VL - 45
SP - 24595
EP - 24603
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 46
ER -
