DOI: 10.1016/j.jcou.2018.03.013
Scopus记录号: 2-s2.0-85044081672
论文题名: Continuous CO2 capture and reduction in one process: CO2 methanation over unpromoted and promoted Ni/ZrO2
作者: Hu L. ; Urakawa A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 25 起始页码: 323
结束页码: 329
语种: 英语
英文关键词: CO2 capture and reduction
; CO2 methanation
; Lanthanum
; Nickel catalyst
; Potassium
Scopus关键词: Carbon dioxide
; Catalyst regeneration
; Catalysts
; Hydrogenation
; Lanthanum
; Methanation
; Nickel
; Nickel compounds
; Potassium
; Temperature
; CO2 capture
; High temperature
; Low temperatures
; Nickel catalyst
; Promoted catalysts
; Rapid reduction
; Temperature independents
; Unsteady-state operation
; Zirconium compounds
英文摘要: The recently demonstrated concept to combine CO2 capture and utilization in one process using isothermal unsteady-state operation, namely CO2 capture and reduction (CCR), was applied for CO2 methanation using unpromoted and K- or La-promoted Ni/ZrO2 catalysts. Both K and La promoters significantly improve CO2 capture capacity and also the selectivity of CO2 conversion to methane. The K-promoted catalyst (Ni-K/ZrO2) captures a larger amount of CO2 at high temperature but the capture capacity drops at low temperature due to incomplete catalyst regeneration during the cyclic unsteady-state reaction condition. In contrast, the La-promoted catalyst (Ni-La/ZrO2) shows temperature-independent CO2 capture capacity and rapid reduction of captured CO2, thus leading to stable CCR performance. The nature of the active sites and mechanistic details were gained by TPR, reductive CO2-TPD and space- and time-resolved operando DRIFTS, holistically elucidating the effects of the promoters and their impacts on CCR activity. © 2018 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/111894
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, Tarragona, 43007, Spain
Recommended Citation:
Hu L.,Urakawa A.. Continuous CO2 capture and reduction in one process: CO2 methanation over unpromoted and promoted Ni/ZrO2[J]. Journal of CO2 Utilization,2018-01-01,25