Syngas production via combined steam and carbon dioxide reforming of methane over Ni-Ce/MgAl2O4 catalysts with enhanced coke resistance

Kee Young Koo, Sung Hun Lee, Un Ho Jung, Hyunseog Roh, Wang Lai Yoon

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

A Ni-Ce/MgAl2O4 catalyst was prepared by the co-impregnation method by adjusting the Ce/Ni ratio in a range of 0.0-1.0 for the combined steam and carbon dioxide reforming of methane (CSCRM). The characterization as to surface area, metal dispersion, NiO crystallite size as well as reduction temperature and basicity of prepared catalysts was analyzed by BET, H2-chemisroption, XRD, TPR and CO2-TPD. The used catalysts were collected to investigate the coke formation and surface characteristics through SEM, TGA, XPS and Raman analysis. The Ce addition to Ni/MgAl2O4 catalyst has significant effects on the NiO crystallite size, metal dispersion and reduction degree. The Ni-Ce/MgAl 2O4 catalyst with the Ce/Ni ratio of 0.25 showed the smallest NiO crystallite size of 8.3 nm and the highest metal dispersion of 4.91%. Meanwhile, in the Ni/MgAl2O4 (Ce/Ni = 0) catalyst, the NiO crystallite size was found to be as large as 11.0 nm and showed a low metal dispersion of 3.49%. The Ni-Ce/MgAl2O4 (Ce/Ni = 0.25) catalyst shows the highest activity and coke resistance in CSCRM due to the improvement of metal dispersion, excellent reducibility as well as effective surface oxygen transfer as evidenced by XPS results.

Original languageEnglish
Pages (from-to)151-157
Number of pages7
JournalFuel Processing Technology
Volume119
DOIs
Publication statusPublished - 2014 Jan 1

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Methane
Steam
Reforming reactions
Carbon Dioxide
Coke
Carbon dioxide
Catalysts
Crystallite size
Metals
X ray photoelectron spectroscopy
Temperature programmed desorption
Alkalinity
spinell
Impregnation
Thermodynamic properties
Oxygen
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

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title = "Syngas production via combined steam and carbon dioxide reforming of methane over Ni-Ce/MgAl2O4 catalysts with enhanced coke resistance",
abstract = "A Ni-Ce/MgAl2O4 catalyst was prepared by the co-impregnation method by adjusting the Ce/Ni ratio in a range of 0.0-1.0 for the combined steam and carbon dioxide reforming of methane (CSCRM). The characterization as to surface area, metal dispersion, NiO crystallite size as well as reduction temperature and basicity of prepared catalysts was analyzed by BET, H2-chemisroption, XRD, TPR and CO2-TPD. The used catalysts were collected to investigate the coke formation and surface characteristics through SEM, TGA, XPS and Raman analysis. The Ce addition to Ni/MgAl2O4 catalyst has significant effects on the NiO crystallite size, metal dispersion and reduction degree. The Ni-Ce/MgAl 2O4 catalyst with the Ce/Ni ratio of 0.25 showed the smallest NiO crystallite size of 8.3 nm and the highest metal dispersion of 4.91{\%}. Meanwhile, in the Ni/MgAl2O4 (Ce/Ni = 0) catalyst, the NiO crystallite size was found to be as large as 11.0 nm and showed a low metal dispersion of 3.49{\%}. The Ni-Ce/MgAl2O4 (Ce/Ni = 0.25) catalyst shows the highest activity and coke resistance in CSCRM due to the improvement of metal dispersion, excellent reducibility as well as effective surface oxygen transfer as evidenced by XPS results.",
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Syngas production via combined steam and carbon dioxide reforming of methane over Ni-Ce/MgAl2O4 catalysts with enhanced coke resistance. / Koo, Kee Young; Lee, Sung Hun; Jung, Un Ho; Roh, Hyunseog; Yoon, Wang Lai.

In: Fuel Processing Technology, Vol. 119, 01.01.2014, p. 151-157.

Research output: Contribution to journalArticle

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T1 - Syngas production via combined steam and carbon dioxide reforming of methane over Ni-Ce/MgAl2O4 catalysts with enhanced coke resistance

AU - Koo, Kee Young

AU - Lee, Sung Hun

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AU - Yoon, Wang Lai

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