CAS OpenIR  > 研究所(批量导入)
Coking-resistant Ni-ZrO2/Al2O3 catalyst for CO methanation
Alternative TitleJ. Energy Chem.
Liu, Qing; Gu, Fangna; Gao, Jiajian; Li, Huifang; Xu, Guangwen; Su, Fabing
2014-11-01
Source PublicationJOURNAL OF ENERGY CHEMISTRY
ISSN2095-4956
Volume23Issue:6Pages:761-770
AbstractHighly coke-resisting ZrO2-decorated Ni/Al2O3 catalysts for CO methanation were prepared by a two-step process. The support was first loaded with NiO by impregnating method and then modified with ZrO2 by deposition-precipitation method (IM-DP). Nitrogen adsorption-desorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, H-2 temperature-programmed reduction and desorption, NH3 temperature-programmed desorption, and zeta potential analysis were employed to characterize the samples. The results revealed that, compared with the catalysts with the same composition prepared by co-impregnation (CI) and sequential impregnation (SI) methods, the Ni/Al2O3 catalyst prepared by IM-DP showed much enhanced catalytic performance for syngas methanation under the condition of atmospheric pressure and a high weight hourly space velocity of 120000 mL.g(-1).h(-1). In a 80 h life time test under the condition of 300-600 degrees C and 3.0 MPa, this catalyst showed high stability and resistance to coking, and the amount of deposited carbon was only 0.4 wt%. On the contrary, the deposited carbon over the catalyst without ZrO2 reached 1.5 wt% after a 60 h life time test. The improved catalytic performance was attributed to the selective deposition of ZrO2 nanoparticles on the surface of NiO rather than Al2O3, which could be well controlled via changing the electrostatic interaction in the DP procedure. This unique structure could enhance the dissociation of CO2 and generate surface oxygen intermediates, thus preventing carbon deposition on the Ni particles in syngas methanation.; Highly coke-resisting ZrO2-decorated Ni/Al2O3 catalysts for CO methanation were prepared by a two-step process. The support was first loaded with NiO by impregnating method and then modified with ZrO2 by deposition-precipitation method (IM-DP). Nitrogen adsorption-desorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, H-2 temperature-programmed reduction and desorption, NH3 temperature-programmed desorption, and zeta potential analysis were employed to characterize the samples. The results revealed that, compared with the catalysts with the same composition prepared by co-impregnation (CI) and sequential impregnation (SI) methods, the Ni/Al2O3 catalyst prepared by IM-DP showed much enhanced catalytic performance for syngas methanation under the condition of atmospheric pressure and a high weight hourly space velocity of 120000 mL.g(-1).h(-1). In a 80 h life time test under the condition of 300-600 degrees C and 3.0 MPa, this catalyst showed high stability and resistance to coking, and the amount of deposited carbon was only 0.4 wt%. On the contrary, the deposited carbon over the catalyst without ZrO2 reached 1.5 wt% after a 60 h life time test. The improved catalytic performance was attributed to the selective deposition of ZrO2 nanoparticles on the surface of NiO rather than Al2O3, which could be well controlled via changing the electrostatic interaction in the DP procedure. This unique structure could enhance the dissociation of CO2 and generate surface oxygen intermediates, thus preventing carbon deposition on the Ni particles in syngas methanation.
KeywordNi/gamma-al2o3 Zro2 Coke Resistance Syngas Methanation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/S2095-4956(14)60210-2
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSYNTHETIC NATURAL-GAS ; NI/AL2O3 CATALYSTS ; FLUIDIZED-BED ; SYNGAS METHANATION ; NI/ZRO2 CATALYST ; OVEN GAS ; ZRO2 ; PERFORMANCE ; NI-AL2O3 ; SUPPORTS
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000346331100012
Citation statistics
Cited Times:34[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11793
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liu, Qing,Gu, Fangna,Gao, Jiajian,et al. Coking-resistant Ni-ZrO2/Al2O3 catalyst for CO methanation[J]. JOURNAL OF ENERGY CHEMISTRY,2014,23(6):761-770.
APA Liu, Qing,Gu, Fangna,Gao, Jiajian,Li, Huifang,Xu, Guangwen,&Su, Fabing.(2014).Coking-resistant Ni-ZrO2/Al2O3 catalyst for CO methanation.JOURNAL OF ENERGY CHEMISTRY,23(6),761-770.
MLA Liu, Qing,et al."Coking-resistant Ni-ZrO2/Al2O3 catalyst for CO methanation".JOURNAL OF ENERGY CHEMISTRY 23.6(2014):761-770.
Files in This Item:
File Name/Size DocType Version Access License
Coking-resistant Ni-(2497KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Qing]'s Articles
[Gu, Fangna]'s Articles
[Gao, Jiajian]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Qing]'s Articles
[Gu, Fangna]'s Articles
[Gao, Jiajian]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Qing]'s Articles
[Gu, Fangna]'s Articles
[Gao, Jiajian]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.