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 language | English (US) |
|---|---|
| Pages (from-to) | 543-551 |
| Number of pages | 9 |
| Journal | Studies in Surface Science and Catalysis |
| Volume | 101 A |
| DOIs | |
| State | Published - 1996 |
ASJC Scopus subject areas
- Catalysis
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry