载体对合成气制甲烷镍基催化剂性能的影响

考察了Al2O3-1,Al2O3-2和SiO2负载的Ni基催化剂上合成气制甲烷的反应活性和稳定性.结果表明,Ni/Al2O3-2和Ni/SiO2催化剂表现出较高的催化活性和稳定性,而Ni/Al2O3-1催化剂稳定性极差.采用X射线衍射、透射电镜、程序升温还原、N2吸附-脱附和热重分析等技术对催化剂进行了表征.结果显示,影响催化剂稳定性的主要因素不是积炭,而可能是反应过程中载体结构的破坏和Ni的迁移聚集....

Full description

Saved in:
Bibliographic Details
Published in催化学报 Vol. 32; no. 8; pp. 1400 - 1404
Main Author 李霞 杨霞珍 唐浩东 刘化章
Format Journal Article
LanguageChinese
Published 浙江工业大学工业催化研究所,浙江杭州,310032 2011
Subjects
合成气
氧化硅
氧化铝
甲烷合成
稳定性
镍基催化剂
镍基催化剂
合成气
甲烷合成
氧化硅
稳定性
氧化铝
Online AccessGet full text
ISSN0253-9837
1872-2067
DOI10.3724/SP.J.1088.2011.10405

Cover

More Information
Summary:考察了Al2O3-1,Al2O3-2和SiO2负载的Ni基催化剂上合成气制甲烷的反应活性和稳定性.结果表明,Ni/Al2O3-2和Ni/SiO2催化剂表现出较高的催化活性和稳定性,而Ni/Al2O3-1催化剂稳定性极差.采用X射线衍射、透射电镜、程序升温还原、N2吸附-脱附和热重分析等技术对催化剂进行了表征.结果显示,影响催化剂稳定性的主要因素不是积炭,而可能是反应过程中载体结构的破坏和Ni的迁移聚集.
Bibliography:Catalytic behavior for syngas methanation over nickel-based catalysts with different supports（Al2O3-1,Al2O3-2,and SiO2）was investigated.The results showed that the catalyst prepared by Al2O3-2 or SiO2 support possessed higher activity and stability,while the stability of Ni/Al2O3-1 catalyst was extremely poor.The catalysts were characterized by X-ray powder diffraction,transmission electron mi-croscopy,temperature-programmed reduction,N2 adsorption-desorption,and thermogravimetry.Characterization results showed that carbon deposition is not a key factor in determining the catalyst stability,while the destruction of support structure and the migration and agglom-eration of Ni particles during the reaction may be the main reasons for the rapid deactivation of the Ni/Al2O3-1 catalyst.
syngas; methanation; nickel-based catalyst; alumina; silica; stability
21-1195/O6
LI Xia,YANG Xiazhen,TANG Haodong,LIU Huazhang Institute of Industrial Catalysis,Zhejiang University of Technology,Hangzhou 310032,Zhejiang,China
ISSN:0253-9837
1872-2067
DOI:10.3724/SP.J.1088.2011.10405