DOI: 10.1016/j.jcou.2016.07.010
Scopus记录号: 2-s2.0-84980455978
论文题名: Highly efficient Ni/ZrO2 catalysts prepared via combustion method for CO2 methanation
作者: Zhao K. ; Wang W. ; Li Z.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2016
卷: 16 起始页码: 236
结束页码: 244
语种: 英语
英文关键词: Carbon dioxide
; Combustion medium
; Combustion method
; Methanation
; Nickel-zirconia catalysts
Scopus关键词: Catalysts
; Combustion
; Crystal structure
; Dispersions
; Hydrogenation
; Metabolism
; Metals
; Methanation
; Nickel
; Particle size
; Propanol
; Urea
; Zirconia
; Zirconium alloys
; Active metals
; Adsorption capacities
; Carbon deposition
; Combustion method
; High catalytic performance
; Impregnation methods
; Synergistic effect
; Zirconia catalysts
; Carbon dioxide
英文摘要: The 15 wt% Ni/ZrO2 catalyst was firstly synthesized using urea as the combustion medium, which shows high catalytic performance for CO2 methanation due to its high reducibility and Ni dispersion, small Ni particle size and excellent CO2 adsorption capacity. The CO2 conversion of Ni/ZrO2 prepared by the urea combustion method achieves 60% while the conversion of Ni/ZrO2 using n-propanol as the combustion medium is less than 13% at 300 °C, 0.1 MPa and a WHSV of 48,000 mL·g-1·h-1. A series of catalysts were synthesized using different combustion mediums including ethanol, n-propanol, urea, glycol and glycerol. The prepared catalysts were characterized by BET, ICP-OES, XRD, H2-TPR, H2-TPD and CO2-TPD. The results illustrate that the combustion mediums significantly affect the catalytic pore structure, interaction between active metal and support, Ni dispersion, Ni particle size, the crystal structure of ZrO2 and CO2 adsorption capacity. In addition, the synergistic effect between nickel and mediums leads to a total phase transformation of zirconia from m-ZrO2 to t-ZrO2. The 15Ni/ZrO2 catalyst prepared by urea combustion method exhibits not only higher activity but also better stability due to its smaller Ni particle size and better resistance to carbon deposition than the one prepared by impregnation method. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52843
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Zhao K.,Wang W.,Li Z.. Highly efficient Ni/ZrO2 catalysts prepared via combustion method for CO2 methanation[J]. Journal of CO2 Utilization,2016-01-01,16