Palladium-bismuth intermetallic and surface-poisoned catalysts for the semi-hydrogenation of 2-methyl-3-butyn-2-ol

Nikolay Cherkasov, Alex O. Ibhadon*, Alan J. McCue, James A. Anderson, Shaun K. Johnston

*Corresponding author for this work

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29 Citations (Scopus)

Abstract

The effects of poisoning of Pd catalysts with Bi and annealing in a polyol (ethylene glycol) were studied on the semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY). An increase in the Pd:Bi ratio from 7 to 1 in the Bi-poisoned catalysts decreased the hydrogenation activity due to blocking of active sites, but increased maximum alkene yield from 91.5% for the Pd catalyst to 94-96% for all Bi-poisoned Pd catalysts, by decreasing the adsorption energy of alkene molecules and suppressing the formation of β-hydride phase. Annealing of the catalysts induced the formation of intermetallic phases and decreased its activity due to sintering of the catalytic particles and low activity of intermetallic compounds. Langmuir-Hinshelwood kinetic modelling of the experimental data showed that poisoning of Pd with Bi changed the relative adsorption constants of organic species suggesting ligand effects at high Bi content.

Original languageEnglish
Pages (from-to)22-30
Number of pages9
JournalApplied Catalysis A: General
Volume497
Early online date27 Feb 2015
DOIs
Publication statusPublished - 1 May 2015

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Keywords

  • 2-Methyl-3-butyn-2-ol
  • Alkynol
  • Bismuth
  • Heterogeneous catalysis
  • Hydrogenation
  • Palladium
  • Semi-hydrogenation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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