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ZrO2-modified Ni/LaAl11O18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance
Ai, Hongmei1,2; Yang, Hongyuan1; Liu, Qing1; Zhao, Guoming1; Yang, Jing1; Gu, Fangna3
2018-02-18
Source PublicationCHINESE JOURNAL OF CATALYSIS
ISSN1872-2067
Volume39Issue:2Pages:297-308
Abstract

We report Ni/LaHA@ZrO2 catalysts prepared by a facile modified successive adsorption and reaction method for CO methanation. N2 adsorption, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, H-2 temperature-programmed reduction, H-2 temperature-programmed desorption, X-ray photoelectron spectroscopy, thermogravimetric analysis, and inductively coupled plasma atomic emission spectrometry were used to characterize the samples. The results indicated that the ZrO2 nanoparticles were distributed over the surface of the Ni/LaHA@ZrO2 catalyst and even partially covered some Ni particles, resulting in the coating exerting a confinement effect The excess ZrO2 had an adverse effect on the enhancement of CO conversion because of the coverage of the surface Ni particles; however, the Ni/LaHA@ZrO2 catalyst displayed much higher CH4 selectivity than Ni/LaHA because of the activation of the byproduct CO2 molecules by ZrO2 species. Therefore, even though 20Ni/LaHA@ZrO2-5 exhibited similar CO conversion as 20Ni/LaHA, the use of the former resulted in a higher CH4 yield than the use of the latter. A 107-h-lifetime test revealed that the Ni/LaHA@ZrO2 catalyst was highly stable with superior anti-sintering and anti-coking properties because of its coating structure and the promoter effect of ZrO2. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

KeywordLanthanum Hexaaluminate Zro2 Nickel Catalyst Coating Structure Co Methanation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/S1872-2067(17)62995-4
Indexed BySCI
Language英语
WOS KeywordAtomic Layer Deposition ; Hydrogen-production ; Al catAlysts ; Knoevenagel Condensation ; Combustion Method ; Ni/zro2 Catalyst ; Carbon-dioxide ; Oven Gas ; La ; Hexaaluminate
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21606146) ; Natural Science Foundation of Shandong Province(ZR2016BB17 ; Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents(2016RCJJ005 ; Government Sponsored Visiting Scholar Foundation of Shandong University of Science and Technology ; Qingdao Postdoctoral Applied Research Project(2015202) ; China National Coal Association Science and Technology Research Program(MTKJ2016-266) ; 2016ZRB01037) ; 2016RCJJ006)
WOS IDWOS:000428822200008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24166
Collection多相复杂系统国家重点实验室
Affiliation1.Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Key Lab Low Carbon Energy & Chem Engn, Qingdao 266590, Shandong, Peoples R China
2.Shandong Univ Sci & Technol, Assets Management Div, Qingdao 266590, Shandong, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ai, Hongmei,Yang, Hongyuan,Liu, Qing,et al. ZrO2-modified Ni/LaAl11O18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance[J]. CHINESE JOURNAL OF CATALYSIS,2018,39(2):297-308.
APA Ai, Hongmei,Yang, Hongyuan,Liu, Qing,Zhao, Guoming,Yang, Jing,&Gu, Fangna.(2018).ZrO2-modified Ni/LaAl11O18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance.CHINESE JOURNAL OF CATALYSIS,39(2),297-308.
MLA Ai, Hongmei,et al."ZrO2-modified Ni/LaAl11O18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance".CHINESE JOURNAL OF CATALYSIS 39.2(2018):297-308.
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