Dehydration mechanism of ethanol in the pseudoliquid phase of H3-xCsxPW12O40

Toshio Okuhara, Takeo Arai, Tatsumi Ichiki, Kwan Young Lee, Makato Misono

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Dehydration of ethanol catalyzed by H3-xCsxPW12O40 has been studied by a transient response method and solid-state NMR spectroscopy. An unusual pressure dependency was observed for catalysts with x ≤ 2. This has been explained by assuming (1) that C2H5OH+ 2 and (C2H5OH)2H+ act as intermediates for the formation of ethylene and ether, respectively, in the pseudoliquid phase and (2) that the concentrations of these intermediates are determined by protonation equilibria established in the system. The presence of these species as well as of an ethoxy group has been detected directly by solid-state NMR spectroscopy in the case of H3PW12O40. Dehydration over H0.5Cs2.5PW12O40 proceeded by surface reaction as in the case of ordinary acid solids.

Original languageEnglish
Pages (from-to)293-301
Number of pages9
JournalJournal of Molecular Catalysis
Volume55
Issue number1
Publication statusPublished - 1989 Nov 1
Externally publishedYes

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Dehydration
Ethanol
Nuclear magnetic resonance spectroscopy
Protonation
Surface reactions
Transient analysis
Ethers
Ethylene
Catalysts
Acids

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Dehydration mechanism of ethanol in the pseudoliquid phase of H3-xCsxPW12O40 . / Okuhara, Toshio; Arai, Takeo; Ichiki, Tatsumi; Lee, Kwan Young; Misono, Makato.

In: Journal of Molecular Catalysis, Vol. 55, No. 1, 01.11.1989, p. 293-301.

Research output: Contribution to journalArticle

Okuhara, T, Arai, T, Ichiki, T, Lee, KY & Misono, M 1989, 'Dehydration mechanism of ethanol in the pseudoliquid phase of H3-xCsxPW12O40 ', Journal of Molecular Catalysis, vol. 55, no. 1, pp. 293-301.
Okuhara, Toshio ; Arai, Takeo ; Ichiki, Tatsumi ; Lee, Kwan Young ; Misono, Makato. / Dehydration mechanism of ethanol in the pseudoliquid phase of H3-xCsxPW12O40 In: Journal of Molecular Catalysis. 1989 ; Vol. 55, No. 1. pp. 293-301.
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