Catalysis Letters

, Volume 103, Issue 1–2, pp 137–141 | Cite as

Electrochemical Promotion by Potassium of Rh-Catalysed Fischer–Tropsch Synthesis at High Pressure

  • Andrew J. Urquhart
  • Federico J. Williams
  • Richard M. Lambert
Article

Rh-catalysed Fischer–Tropsch synthesis at high pressures exhibits reversible electrochemical promotion by potassium. At 473 K and 14 bar, 43 products were detected, comprising alkanes, alkenes and primary alcohols. Potassium increased selectivity towards alkenes and primary alcohols as a result of actual increases in the rates of formation of these products – an apparently unprecedented observation. Alkane formation was progressively suppressed by added alkali. These findings are discussed in terms of K-induced acceleration and retardation of possible rate limiting steps for alkene and alkane formation, respectively. Plausible mechanisms are discussed.

Keywords

electrochemical promotion Fischer–Tropsch synthesis potassium 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Andrew J. Urquhart
    • 1
  • Federico J. Williams
    • 1
  • Richard M. Lambert
    • 1
  1. 1.Department of ChemistryUniversity of CambridgeCambridgeEngland

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