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Enhanced catalytic performances of Ni/Al2O3 catalyst via addition of V2O3 for CO methanation
Alternative TitleAppl. Catal. A-Gen.
Liu, Qing1; Gu, Fangna1; Lu, Xiaopeng1; Liu, Youjun1; Li, Huifang1; Zhong, Ziyi2; Xu, Guangwen1; Su, Fabing1
2014-11-01
Source PublicationAPPLIED CATALYSIS A-GENERAL
ISSN0926-860X
Volume488Issue:NOVPages:37-47
AbstractHighly active and coking resistant Ni-V2O3/Al2O3 catalysts were prepared by co-impregnation method for CO and CO2 methanation. The influence of vanadium oxide addition on catalyst structure, distribution and reducibility of Ni species, morphology and surface characteristics, was investigated in detail. Compared to the catalyst without vanadium, the Ni-V2O3/Al2O3 catalysts showed significant improvement in the activity, thermal stability, and resistance to coke formation in CO methanation. In addition, these catalysts also showed high activities for CO2 methanation at both atmospheric and 2.0 MPa pressures. It was found that Ni3V2O8 was formed during the calcination of the Ni-V2O3/Al2O3 catalysts, which led to the formation of smaller Ni particle sizes (ca. 3.0 nm) as compared to the case without vanadium oxide addition. The higher catalytic activity over the Ni-V2O3/Al2O3 catalysts for CO methanation was mainly due to the larger H-2 uptake, the higher Ni dispersion as well as the smaller metallic Ni nanoparticles. The oxidation-reduction cycle of V2O3 could increase the oxygen vacancies, which enhanced the dissociation of CO2 by-product and generated surface oxygen intermediates, thus preventing carbon deposition on the Ni particles in CO methanation. (C) 2014 Elsevier B.V. All rights reserved.; Highly active and coking resistant Ni-V2O3/Al2O3 catalysts were prepared by co-impregnation method for CO and CO2 methanation. The influence of vanadium oxide addition on catalyst structure, distribution and reducibility of Ni species, morphology and surface characteristics, was investigated in detail. Compared to the catalyst without vanadium, the Ni-V2O3/Al2O3 catalysts showed significant improvement in the activity, thermal stability, and resistance to coke formation in CO methanation. In addition, these catalysts also showed high activities for CO2 methanation at both atmospheric and 2.0 MPa pressures. It was found that Ni3V2O8 was formed during the calcination of the Ni-V2O3/Al2O3 catalysts, which led to the formation of smaller Ni particle sizes (ca. 3.0 nm) as compared to the case without vanadium oxide addition. The higher catalytic activity over the Ni-V2O3/Al2O3 catalysts for CO methanation was mainly due to the larger H-2 uptake, the higher Ni dispersion as well as the smaller metallic Ni nanoparticles. The oxidation-reduction cycle of V2O3 could increase the oxygen vacancies, which enhanced the dissociation of CO2 by-product and generated surface oxygen intermediates, thus preventing carbon deposition on the Ni particles in CO methanation. (C) 2014 Elsevier B.V. All rights reserved.
KeywordNi/al2o3 Catalyst Vanadium Oxide Ni3v2o8 Co Methanation Co2 Methanation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
DOI10.1016/j.apcata.2014.09.028
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSYNTHETIC NATURAL-GAS ; PROMOTED RHODIUM CATALYSTS ; CARBON-DIOXIDE ; OXIDATIVE DEHYDROGENATION ; NI/TIO2 CATALYST ; OVEN GAS ; HYDROGENATION ; VANADIUM ; SYNGAS ; TEMPERATURE
WOS Research AreaChemistry ; Environmental Sciences & Ecology
WOS SubjectChemistry, Physical ; Environmental Sciences
WOS IDWOS:000346214100005
Citation statistics
Cited Times:64[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11794
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.ASTAR, Inst Chem Engn & Sci, Jurong Island 627833, Singapore
Recommended Citation
GB/T 7714
Liu, Qing,Gu, Fangna,Lu, Xiaopeng,et al. Enhanced catalytic performances of Ni/Al2O3 catalyst via addition of V2O3 for CO methanation[J]. APPLIED CATALYSIS A-GENERAL,2014,488(NOV):37-47.
APA Liu, Qing.,Gu, Fangna.,Lu, Xiaopeng.,Liu, Youjun.,Li, Huifang.,...&Su, Fabing.(2014).Enhanced catalytic performances of Ni/Al2O3 catalyst via addition of V2O3 for CO methanation.APPLIED CATALYSIS A-GENERAL,488(NOV),37-47.
MLA Liu, Qing,et al."Enhanced catalytic performances of Ni/Al2O3 catalyst via addition of V2O3 for CO methanation".APPLIED CATALYSIS A-GENERAL 488.NOV(2014):37-47.
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