Catalytic steam reforming of propane over Ni/LaAlO 3 catalysts: Influence of preparation methods and OSC on activity and stability

D. Harshini, Chang Won Yoon, Jonghee Han, Sung Pil Yoon, Suk Woo Nam, Tae Hoon Lim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

To develop an efficient catalyst for steam reforming of propane, Ni/LaAlO 3 catalysts were prepared by deposition precipitation, impregnation, and solvo-thermal methods, and characterized by XRD, BET, H 2-TPR, elemental analyses, and TEM. Ni/Al 2O 3 and Ni/CeO 2 catalysts were also synthesized by the solvo-thermal method for comparison. The Ni/LaAlO 3 catalysts exhibited better catalytic performance than both Ni/Al 2O 3 and Ni/CeO 2 catalysts, and activities with Ni/LaAlO 3 were found to be dependent upon the preparation methods. In particular, the Ni/LaAlO 3 catalyst synthesized by the solvo-thermal method exhibited the highest activity presumably because tetrahydrofuran helps distribute generated Ni nanoparticles onto the catalyst surface in a uniform fashion. In addition, the solvo-thermally prepared Ni/LaAlO 3 catalyst was found to be highly stable, with its activity being maintained at least during 100 h. The observed high stability is attributed to the excellent oxygen storage capacity of LaAlO 3, which was first determined by thermogravimetric methods as well as by soot oxidations in the presence of Al 2O 3, CeO 2, and LaAlO 3. Compared to the Ni/Al 2O 3 and Ni/CeO 2 catalysts, Ni/LaAlO 3 exhibited suppressed carbon formation even at lower S/C ratios due to the superior oxygen transport ability of the LaAlO 3 support. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)205-212
Number of pages8
JournalCatalysis Letters
Volume142
Issue number2
DOIs
Publication statusPublished - 2012 Feb

Keywords

  • Ni/LaAlO catalysts
  • Oxygen storage capacity
  • Solvo-thermal method
  • Soot oxidation
  • Steam reforming of propane

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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