A study of platinum supported on tungstated zirconia catalysts

Gustavo Larsen, Edgar Lotero, Srinivasanallur Raghavan, Rubén D. Parra, Carlos A. Querini

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

The reaction of n-butane with hydrogen at 573 K was studied over platinum supported on tungstated zirconia (PtWZ). A higher Pt dispersion increases the selectivity toward hydrogenolysis products and overall activity. The % coke after 90 min on stream at a H2/n-C4 ratio of 3 was found to be less than 0.1 wt.-% in all cases. The presence of Brønsted acid sites upon reduction is confirmed by diffuse reflectance infrared spectroscopy of adsorbed pyridine. The WO3/ZrO2 (WZ) support consists of a mixture of tetragonal and monoclinic zirconia and tetragonal tungsten oxide regardless of the presence of platinum.

Original languageEnglish (US)
Pages (from-to)201-211
Number of pages11
JournalApplied Catalysis A: General
Volume139
Issue number1-2
DOIs
StatePublished - Jun 6 1996

Keywords

  • Platinum supported on tungsta-zirconia
  • Pyridine adsorption
  • Temperature-programmed oxidation
  • n-Butane isomerization

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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