1,3-butadiene production by crotyl alcohol dehydration over solid acids and catalyst deactivation by water adsorption

Atsushi Segawa, Tatsuya Ichijo, Nobuhiro Kimura, Keisuke Tsuruta, Naohiro Yoshida, Masaki Okamoto

Research output: Contribution to journalArticle

Abstract

The synthesis of 1,3-butadiene via the dehydration of crotyl alcohol (2-buten-1-ol) over solid acids (six silica-alumina catalysts, two zeolite catalysts, and one γ-alumina catalyst) was assessed. Crotyl alcohol conversion and butadiene selectivity were both 95% or more over commercial silica-alumina catalysts. However, a sudden decrease in catalytic activity was observed during the reaction. Since the deactivated catalyst was regenerated by drying at 150°C -200°C, results showed that the main cause of the catalyst deactivation was the adsorption of water formed during the reaction and not the coke formation. An analysis of the deactivated catalyst indicated that, since the formation of Al-OH by the hydrolysis of the Al-O-Al bond increased the hydrophilicity of the catalyst surface, the adsorption of water on the catalyst surface was promoted, while that of crotyl alcohol was probably inhibited. Also, based on the catalyst characterization, the silica-alumina catalysts with few silanol groups, few alumina-rich zones, and a low Si/Al ratio were preferable.

Original languageEnglish
Pages (from-to)70-78
Number of pages9
JournalJournal of The Japan Petroleum Institute
Volume63
Issue number2
DOIs
Publication statusPublished - 2020

Keywords

  • 1,3-Butadiene
  • Alcohol dehydration
  • Catalyst regeneration
  • Silica-alumina catalyst
  • Water adsorption

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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