Alcohol dehydration reactions over tungstated zirconia catalysts

Gustavo Larsen, Edgar Lotero, Lucía M. Petkovic, David S. Shobe

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

The behavior of tungstated zirconia (WZ) toward dehydration of 1-propanol, 2-propanol, and tert.-butanol was compared with that of H-mordenite. For 1- and 2-propanol, the desorption temperatures of olefinic products formed over the WZ catalyst were found to be very close to those observed in H-mordenite; however, the zeolite catalyst had a much larger tendency to retain (or to readsorb) olefins in the pores in the form of oligomerization products, as evidenced by the detection of the m/e = 65 signal (cyclopentadienyl cation) during the temperature-programmed reaction of 2-propanol. The Brønsted acid sites of the zeolite underwent rapid H+/D+ exchange when 2-propanol deuterated in its hydroxyl group was used. This allowed the olefinic products to incorporate deuterium during reaction. On the other hand, the WZ catalyst did not effect the H+/D+ exchange of propene formed from CH3-HCOD-CH3, presumably because olefin readsorption onto hydrated W6+ sites does not take place. The structure of the WZ catalyst was monitored by EXAFS and XRD.

Original languageEnglish (US)
Article numberCA971698
Pages (from-to)67-75
Number of pages9
JournalJournal of Catalysis
Volume169
Issue number1
DOIs
StatePublished - Jan 1 1997

    Fingerprint

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this