Catalysis Letters

, Volume 18, Issue 4, pp 401–407 | Cite as

The state of platinum in Pt-Al2O3 catalysts containing high chloride loading

  • Anantha R. Sethuraman
  • Burtron H. Davis
Article

Abstract

XPS data indicate that Pt in a highly chlorided (5–10% Cl) Pt-Al2O3 catalyst is present in a metallic form, and is not chlorided. Surface chloride concentration decreases following reduction in hydrogen; exposure to oxygen increases the surface chloride concentration. In contrast, reduction of chloride containing Pt-SiO2 catalyst dramatically reduces the chloride level; in addition, treatment with CCl4 appears to reoxidize at least some of the Pt in the Pt-SiO2 catalyst.

Keywords

Platinum platinum-alumina catalysts isomerization catalyst chlorided Pt-Al2O3 XPS ESCA 

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Copyright information

© J.C. Baltzer AG, Science Publishers 1993

Authors and Affiliations

  • Anantha R. Sethuraman
    • 1
  • Burtron H. Davis
    • 1
  1. 1.Center for Applied Energy ResearchUniversity of KentuckyLexingtonUSA

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