DOI: 10.1016/j.jcou.2017.12.018
Scopus记录号: 2-s2.0-85040452417
论文题名: Active and stable hydrotalcite derived Ni catalysts for CO2 reforming of methane: Comparison with catalysts by incipient wetness
作者: Kalai D.Y. ; Stangeland K. ; Jin Y. ; Yu Z.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 25 起始页码: 346
结束页码: 355
语种: 英语
英文关键词: Biogas
; Dry reforming
; Hydrotalcite
; Incipient wetness
; Nickel catalyst
Scopus关键词: Aluminum
; Aluminum alloys
; Biogas
; Carbon dioxide
; Catalyst deactivation
; Catalysts
; Greenhouse gases
; Magnesium alloys
; Methane
; Nickel
; Scanning electron microscopy
; Sintering
; Temperature programmed desorption
; X ray diffraction
; Dry reforming
; Gas hourly space velocities
; Hydrotalcites
; Incipient wetness
; Incipient wetness method
; Nickel catalyst
; Technological development
; Temperature-programmed reduction
; Catalyst activity
英文摘要: Dry reforming of methane (DRM) for synthesis gas production has a promising future in technological developments due to the utilization of CO2, the principal anthropogenic greenhouse gas. However, this process is still far from industrialization because of catalyst deactivation by coking and sintering. In this study, a series of Ni(Mg)-Al hydrotalcite (HT) derived catalysts were prepared and compared to catalysts prepared by the conventional incipient wetness method. The as-prepared and calcined catalysts were characterized by N2 adsorption-desorption, X-ray diffraction, temperature programmed reduction, H2-chemisorption and scanning electron microscope. DRM experiments were carried out at a very high gas hourly space velocity of 240,000ml/ (gcat h) to compare the activity and stability of the catalysts. The 20Ni-Mg-Al HT showed remarkably high and stable conversions in DRM at 750°C, while the 12Ni-Al HT catalyst presented the poorest activity, resulting from impure HT structure and consequently unstable Ni particles. The 20Ni-Mg-Al HT was further proved to be active and stable under various biogas compositions, even in the deficiency of CO2. This study demonstrates that pure HT-derived Ni catalysts are superior for DRM at different reaction conditions, and can be utilized for direct biogas upgrading. © 2018 Published by Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111902
Appears in Collections: 气候减缓与适应
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作者单位: Department of Petroleum Engineering, University of Stavanger, Stavanger, 4036, Norway; School of Environment, Tsinghua University, Beijing, 100084, China
Recommended Citation:
Kalai D.Y.,Stangeland K.,Jin Y.,et al. Active and stable hydrotalcite derived Ni catalysts for CO2 reforming of methane: Comparison with catalysts by incipient wetness[J]. Journal of CO2 Utilization,2018-01-01,25