Characterization of palladium supported on sulfated zirconia catalysts by DRIFTS, XAS and n-butane isomerization reaction in the presence of hydrogen

Gustavo Larsen, Edgar Lotero, Rubén D. Parra, Lucía M. Petkovic, Hugo S. Silva, Srinivasanallur Raghavan

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Palladium supported on sulfated zirconia (PdSZ) has been characterized by the n-butane isomerization reaction in the presence of hydrogen, X-ray absorption spectroscopy (XAS) and diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) of adsorbed carbon monoxide. Catalyst calcination at 873 K followed by hydrogen reduction at 513 K results in the formation of 30-40 Å Pd metal clusters, but the surface can only weakly adsorb CO, though stronger than Pd-free, sulfated zirconia catalysts. In the presence of hydrogen, PdSZ has a lower n-butane isomerization activity than SZ, and the Pd function cannot stabilize the reaction at low H2/n-butane ratios.

Original languageEnglish (US)
Pages (from-to)213-226
Number of pages14
JournalApplied Catalysis A, General
Volume130
Issue number2
DOIs
StatePublished - Sep 28 1995

Keywords

  • Palladium on sulfated zirconia
  • Palladium promotion
  • Solid superacids
  • n-Butane isomerization

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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