DOI: 10.1016/j.jcou.2017.10.022
Scopus记录号: 2-s2.0-85033606085
论文题名: Steady-state and controlled heating rate methanation of CO2 on Ni/MgO in a bench-scale fixed bed tubular reactor
作者: Baldauf-Sommerbauer G. ; Lux S. ; Aniser W. ; Bitschnau B. ; Letofsky-Papst I. ; Siebenhofer M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 23 起始页码: 1
结束页码: 9
语种: 英语
英文关键词: Carbon dioxide
; Hydrogen storage
; Magnesium oxide catalyst
; Methanation
; Nickel catalyst
; Power-to-gas
Scopus关键词: Catalyst activity
; Catalysts
; Energy resources
; Hydrogen storage
; Hydrogenation
; Magnesium compounds
; Methanation
; Methane
; Nickel
; Nickel compounds
; Renewable energy resources
; Scanning
; Carbon dioxide conversions
; Catalyst temperature
; Chemical hydrogen storage
; Controlled heating rates
; Fixed bed tubular reactors
; Heterogeneous catalyst
; Nickel catalyst
; Thermodynamic equilibria
; Carbon dioxide
英文摘要: Chemical hydrogen storage via conversion with carbon dioxide into methane is a promising technology in an energy system that relies on renewable energy resources. Robust heterogeneous catalysts are needed for this reaction to proceed at relevant levels. Ni/MgO is a promising catalyst in terms of activity and stability. Although several microscale catalyst studies exist, there is a lack of knowledge on catalyst performance and reactor control at larger scale for carbon dioxide methanation at ambient pressure and a technically relevant stoichiometric H2:CO2 (4:1) feed. Two catalysts with a loading of 11 and 17 wt.% nickel were prepared by wet impregnation, producing a Ni/MgO solid solution with a cubic lattice. Controlled increase (‘scanning experiment’) of the catalyst temperature to 500 °C for the highly exothermic CO2 methanation was compared to steady-state experiments. Scanning and steady-state experiments yield comparable results in terms of carbon dioxide conversion and methane selectivity, whereas scanning experiments lead to considerable time saving. At a moderate temperature of 325 °C and a feed flow consisting of H2:CO2:N2 = 4:1:5 at a flow rate of 250 cm3 STPmin−1, CO2 conversion and CH4 selectivity near thermodynamic equilibrium are achievable. The long-term stability of Ni/MgO (17 wt.% Ni) at 330 °C was proven during reactor operation for several days. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112004
Appears in Collections: 气候减缓与适应
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作者单位: Graz University of Technology, Institute of Chemical Engineering and Environmental Technology, NAWI Graz, Inffeldgasse 25C, Graz, 8010, Austria; Graz University of Technology, Institute of Physical and Theoretical Chemistry, Stremayrgasse 9, Graz, 8010, Austria; Graz University of Technology, NAWI Graz, Institute for Electron Microscopy & Nanoanalysis and Center for Electron Microscopy, Steyrergasse 17, Graz, 8010, Austria
Recommended Citation:
Baldauf-Sommerbauer G.,Lux S.,Aniser W.,et al. Steady-state and controlled heating rate methanation of CO2 on Ni/MgO in a bench-scale fixed bed tubular reactor[J]. Journal of CO2 Utilization,2018-01-01,23