Effects of la addition to Ni/Al2O3 catalysts on rates and carbon deposition during steam reforming of n-dodecane

Masanori Sugisawa, Kazuhiro Takanabe, Makoto Harada, Jun Kubota, Kazunari Domen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Steam reforming of n-dodecane on La-Ni/γ-Al2O3 catalysts was investigated at a relatively low temperature (773 K) to elucidate the catalytic behavior at the inlet of a practical reformer. The addition of lanthanum to the Ni/γ-Al2O3 formulation completely suppressed carbon deposition, which otherwise occurs to a significant extent on unmodified Ni/γ-Al2O3. Modification with La also enhanced the initial turnover rates of hydrogen formation. The La-Ni/γ-Al2O3 catalysts, however, deactivated with increased time-on-stream at a high steam-to-carbon ratio of 3.5, because of oxidation of the active Ni metal. Reduction at 873 K almost fully regenerated the catalytic activity, indicating that the deactivation was not primarily a result of sintering or carbon deposition, but was due to the oxidation of active Ni metal.

Original languageEnglish (US)
Pages (from-to)21-25
Number of pages5
JournalFuel Processing Technology
Volume92
Issue number1
DOIs
StatePublished - Jan 1 2011

Keywords

  • Hydrogen
  • Lanthanum
  • Ni catalyst
  • Steam reforming
  • n-dodecane

ASJC Scopus subject areas

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

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