TY - JOUR
T1 - Ni/Al2O3 catalysts for CO methanation
T2 - Effect of Al2O3 supports calcined at different temperatures
AU - Gao, Jiajian
AU - Jia, Chunmiao
AU - Li, Jing
AU - Zhang, Meiju
AU - Gu, Fangna
AU - Xu, Guangwen
AU - Zhong, Ziyi
AU - Su, Fabing
N1 - Funding Information:
The authors gratefully acknowledge the supports from the Hundred Talents Program of the Chinese Academy of Sciences (CAS), State Key Laboratory of Multiphase Complex Systems of China (No. MPCS-2009-C-01), the National Key Technology R&D Program of China (No. 2010BAC66B01), and the Knowledge Innovation Program of the CAS (No. KGCX2-YW-396). F. Gu is grateful to the support of K. C. Wang Post-doctoral Fellowships of the CAS and China Postdoctoral Science Foundation (No. 20100480026 and 201104151).
PY - 2013/11
Y1 - 2013/11
N2 - The correlation between phase structures and surface acidity of Al 2O3 supports calcined at different temperatures and the catalytic performance of Ni/Al2O3 catalysts in the production of synthetic natural gas (SNG) via CO methanation was systematically investigated. A series of 10 wt% NiO/Al2O3 catalysts were prepared by the conventional impregnation method, and the phase structures and surface acidity of Al2O3 supports were adjusted by calcining the commercial γ-Al2O3 at different temperatures (600-1200 C). CO methanation reaction was carried out in the temperature range of 300-600 C at different weight hourly space velocities (WHSV = 30000 and 120000 mL·g-1·h-1) and pressures (0.1 and 3.0 MPa). It was found that high calcination temperature not only led to the growth in Ni particle size, but also weakened the interaction between Ni nanoparticles and Al2O3 supports due to the rapid decrease of the specific surface area and acidity of Al2O 3 supports. Interestingly, Ni catalysts supported on Al 2O3 calcined at 1200 C (Ni/Al2O 3-1200) exhibited the best catalytic activity for CO methanation under different reaction conditions. Lifetime reaction tests also indicated that Ni/Al2O3-1200 was the most active and stable catalyst compared with the other three catalysts, whose supports were calcined at lower temperatures (600, 800 and 1000 C). These findings would therefore be helpful to develop Ni/Al2O3 methanation catalyst for SNG production.
AB - The correlation between phase structures and surface acidity of Al 2O3 supports calcined at different temperatures and the catalytic performance of Ni/Al2O3 catalysts in the production of synthetic natural gas (SNG) via CO methanation was systematically investigated. A series of 10 wt% NiO/Al2O3 catalysts were prepared by the conventional impregnation method, and the phase structures and surface acidity of Al2O3 supports were adjusted by calcining the commercial γ-Al2O3 at different temperatures (600-1200 C). CO methanation reaction was carried out in the temperature range of 300-600 C at different weight hourly space velocities (WHSV = 30000 and 120000 mL·g-1·h-1) and pressures (0.1 and 3.0 MPa). It was found that high calcination temperature not only led to the growth in Ni particle size, but also weakened the interaction between Ni nanoparticles and Al2O3 supports due to the rapid decrease of the specific surface area and acidity of Al2O 3 supports. Interestingly, Ni catalysts supported on Al 2O3 calcined at 1200 C (Ni/Al2O 3-1200) exhibited the best catalytic activity for CO methanation under different reaction conditions. Lifetime reaction tests also indicated that Ni/Al2O3-1200 was the most active and stable catalyst compared with the other three catalysts, whose supports were calcined at lower temperatures (600, 800 and 1000 C). These findings would therefore be helpful to develop Ni/Al2O3 methanation catalyst for SNG production.
KW - Ni catalyst alumina CO methanation synthetic natural gas carbon deposition
UR - http://www.scopus.com/inward/record.url?scp=84893033917&partnerID=8YFLogxK
U2 - 10.1016/S2095-4956(14)60273-4
DO - 10.1016/S2095-4956(14)60273-4
M3 - 文章
AN - SCOPUS:84893033917
SN - 2095-4956
VL - 22
SP - 919
EP - 927
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
IS - 6
ER -