Tungsta and platinum-tungsta supported on zirconia catalysts for alkane isomerization

Gustavo Larsen, Edgar Lotero, Rubén D. Parra

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Tungsta- and platinum-tungsta supported on zirconia catalysts (WZ and PtWZ) were tested for isomerization of n-butane with hydrogen at 573 K. The catalysts' reduction kinetics and the chemical state of tungsten were studied by X-ray absorption near-edge spectroscopy (XANES) and conventional temperature-programmed (TPR) techniques. Platinum was found to catalyze the reduction of the support and the tungsta co-catalyst. An effective n-butane isomerization catalyst results from the combination of high-temperature calcination and low-temperature reduction. Pyridine adsorption, as monitored by diffuse reflectance infrared spectroscopy (DRIFTS), indicates that water of reduction generates Brønsted acid sites.

Original languageEnglish (US)
Pages (from-to)543-551
Number of pages9
JournalStudies in Surface Science and Catalysis
Volume101 A
StatePublished - Jan 1 1996

Fingerprint

Alkanes
Isomerization
Platinum
zirconium oxides
Zirconia
Paraffins
alkanes
isomerization
platinum
catalysts
Catalysts
Butane
butanes
Tungsten
X ray absorption
Catalyst supports
Pyridine
Calcination
roasting
Temperature

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Tungsta and platinum-tungsta supported on zirconia catalysts for alkane isomerization. / Larsen, Gustavo; Lotero, Edgar; Parra, Rubén D.

In: Studies in Surface Science and Catalysis, Vol. 101 A, 01.01.1996, p. 543-551.

Research output: Contribution to journalArticle

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