DOI: 10.1016/j.jcou.2019.01.006
Scopus记录号: 2-s2.0-85060829080
论文题名: Dry reforming of methane over Ni supported on doped CeO2: New insight on the role of dopants for CO2 activation
作者: Luisetto I. ; Tuti S. ; Romano C. ; Boaro M. ; Di Bartolomeo E.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 30 起始页码: 63
结束页码: 78
语种: 英语
英文关键词: Carbon deposition
; Doped CeO2
; Dry reforming of methane (DRM)
; Oxygen vacancies
Scopus关键词: Carbon
; Carbon dioxide
; Catalytic reforming
; Cerium oxide
; Chemical activation
; Coke
; Electronic states
; Methane
; Nickel
; Oxygen vacancies
; Carbon deposition
; CO2 activation
; Coke formation
; Doped CeO2
; Dry reforming-of-methane
; Filamentous carbon
; Particles sizes
; Synthetic routes
; Catalyst activity
英文摘要: The role of dopants on the catalytic activity for the dry reforming of methane (DRM) was investigated on nickel supported on metal doped ceria (Me-DC) catalysts, Ni/Me0.15Ce0.85O2-δ with Me = Zr4+, La3+ or Sm3+, prepared by citric acid synthetic route. The catalytic activity was in the order Ni/Zr-DC << Ni/Sm-DC < Ni/La-DC Ni/CeO2. After 50 h under stream at 800 °C, samples showed different amounts of filamentous carbon and the most promising catalysts in terms of low coke formation were Ni/Sm-DC and Ni/La-DC. The catalysts coking was not straightforward related to the Ni° particles size. Therefore, we analysed the role of dopants type in activating CO2, a step for coke oxidation. Redox and acid-basic properties of the supports surface have been studied by combining CO2 splitting and CO2-TPD measurements. The amount of oxygen defects increased in the order into: La-DCSm-DC > Zr-DC > CeO2. The extra oxygen vacancies introduced by La3+ and Sm3+ were not capable to split CO2. La-DC and Sm-DC showed significant differences in the numbers and strength of surface basic sites. Therefore, other phenomena rule the formation/removal of carbon on these catalysts. The nature of dopants influenced the Ni-supports interaction and the electronic state of the metal catalyst. © 2019 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117297
Appears in Collections: 气候变化与战略
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Recommended Citation:
Luisetto I.,Tuti S.,Romano C.,et al. Dry reforming of methane over Ni supported on doped CeO2: New insight on the role of dopants for CO2 activation[J]. Journal of CO2 Utilization,2019-01-01,30