Participation of support sites in hydrogenation of 1,3-butadiene over Pt/Al2O3 catalysts

A. Sarkany, G. Stefler, J. W. Hightower

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35 Citations (Scopus)

Abstract

The effect of acidic sites on activity and product selectivity has been investigated in 1,3-butadiene hydrogenation over platinum catalysts prepared with high purity Al2O3 supports (Condea SB, Woelm N, Degussa Alumina C, ICN-N). Degassing the reduced samples at 723 K has increased the selectivity of n-butane formation on catalysts of high platinum dispersion (DCO=68-93%). Over Woelm and ICN aluminas isomerization of 1-butene formed on platinum sites to cis- and trans-2-butene can also be observed. Poisoning the catalysts with water, ammonia and ethylenediamine (EDA) suppresses isomerization of 1-butene, but only EDA hinders markedly formation of n-butane. The results have been interpreted by participation of Lewis acid sites and by contribution of electron deficient platinum sites in the vicinity of the metal-support interface.

Original languageEnglish
Pages (from-to)77-92
Number of pages16
JournalApplied Catalysis A, General
Volume127
Issue number1-2
DOIs
Publication statusPublished - Jun 22 1995

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Keywords

  • 1,3-Butadiene
  • Hydrogenation
  • Metal-support interface
  • Platinum dispersion
  • Platinum/alumina
  • Pretreatment

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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