Steam Reforming of Biogas over CeO2-Coated Ni-Al Plate Catalysts

Quynh Thi Phuong Bui, Yongmin Kim, Hien Thi Bich Nguyen, SukWoo Nam, Jonghee Han, Hyung Chul Ham, Jin Young Kim, Sun Hee Choi, Sung An Hong, Chang Won Yoon

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Abstract

Hydrogen production via steam reforming of a simulated biogas was achieved in a temperature range of 500-800 °C over a plate-type Ni-Al catalyst. To enhance the catalytic activity of the Ni-Al catalyst, a pretreatment process involving pre-oxidation with sequential reduction was employed prior to the reforming reactions. The activated Ni-Al catalyst exhibited increased methane conversion depending on the pre-oxidation temperature. Studies using X-ray diffraction and scanning electron microscopy suggested that the catalyst surface was restructured upon pretreatment, ultimately improving the catalytic activity. To increase its catalytic stability, CeO2 was employed additionally as a structural promoter to prevent both Ni sintering and carbon deposition. The durability of the CeO2-coated Ni-Al catalyst was improved significantly, particularly upon addition of ≥2.8 wt% of CeO2, with ca. 75 % of CH4 conversions being achieved without deactivation over 100 h at 700 °C. The influence of the pre-oxidation temperature, reforming temperature, and steam/CH4 ratio on reforming over a CeO2-Ni-Al catalyst was also elucidated. In addition, the potential roles of CeO2 in the enhancement of activity and stability were discussed. (Graph Presented).

Original languageEnglish
Pages (from-to)1403-1412
Number of pages10
JournalCatalysis Letters
Volume145
Issue number7
DOIs
Publication statusPublished - 2015 Apr 29
Externally publishedYes

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Keywords

  • Biogas
  • CO
  • Fuel cell
  • Green chemistry
  • Heterogeneous catalysis
  • Reforming

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Bui, Q. T. P., Kim, Y., Nguyen, H. T. B., Nam, S., Han, J., Ham, H. C., ... Yoon, C. W. (2015). Steam Reforming of Biogas over CeO2-Coated Ni-Al Plate Catalysts. Catalysis Letters, 145(7), 1403-1412. https://doi.org/10.1007/s10562-015-1532-5