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标题:Methanation over Ni/SiO2: Effect of the catalyst preparation methodologies
时间:2019-11-19 22:18:51
DOI:10.1016/j.ijhydene.2012.12.024
作者:Yan, Xiaoliang; Liu, Yuan; Zhao, Binran
关键词:CO; Methanation; Nickel; Catalyst; Fuel cell
出版源: International Journal of Hydrogen Energy ,38 (5) :2283-2291
摘要:We confirmed here that the catalyst preparation methodologies have a significant effect on the activity and stability of Ni/SiO2 catalyst for methanation of syngas (CO + H-2). Catalyst characterizations using X-ray diffraction (XRD), hydrogen temperature-programmed reduction (H-2-TPR) and transmission electron microscope (TEM) were performed to investigate the structure and performance of the catalysts. The activity and stability of catalysts prepared by thermal decomposition and dielectric-barrier discharge (DBD) plasma decomposition of nickel precursor were compared. The plasma decomposition results in a high dispersion, an enhanced interaction between Ni and the SiO2 support, as well as less defect sites on Ni particles. Enhanced resistance to Ni sintering was also observed. In addition, the plasma prepared catalyst effectively inhibits the formation of inactive carbon species. As a result, the plasma prepared catalyst exhibits significantly improved activity with enhanced stability. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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页数:10 PAGES
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目录:
  • Methanation over Ni/SiO2: Effect of the catalyst preparation methodologies
    • 1. Introduction
    • 2. Experimental
      • 2.1. Catalyst preparation
      • 2.2. Characterizations
      • 2.3. Activity test
    • 3. Results
      • 3.1. Characterization of the fresh 10Ni/SiO2–C and 10Ni/SiO2–P catalysts
      • 3.2. Characterization of the reduced 10Ni/SiO2–C and 10Ni/SiO2–P catalysts
      • 3.3. Activity
      • 3.4. Stability
    • 4. Discussions
    • 5. Conclusions
    • Acknowledgments
    • Appendix A. Supplementary material
    • References

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