Non-catalytic recovery of phenol through decomposition of 2-isopropylphenol in supercritical water

Takafumi Sato, Eiji Haryu, Tadafumi Adschiri, Kunio Arai

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The decomposition of 2-isopropylphenol (IPP) was studied in supercritical water at 723-823 K with a water density of 0-0.5 g/cm3 in the absence of catalyst. The main products were phenol, 2-propylphenol (PP), 2-cresol and 2-ethylphenol. The reaction was determined to proceed as follows. At first, the dealkylation and rearrangement of IPP yielded phenol and PP, respectively. Next, the dealkylation of PP lead to the formation of 2-cresol and 2-ethylphenol. The conversion of IPP and the selectivity of phenol increased with the increasing water density, which led to an increase in the yield of phenol. The recoveries of phenol as high as 43% can be obtained in the high water density (0.5 g/cm3) region at 773 K. The rate constant for decomposition of IPP was correlated with a global reaction model for a range of temperatures from 613 to 823 K.

Original languageEnglish
Pages (from-to)1247-1253
Number of pages7
JournalChemical Engineering Science
Volume59
Issue number6
DOIs
Publication statusPublished - 2004 Mar 1

Keywords

  • Environment
  • Fuel
  • Phenol
  • Reaction engineering
  • Supercritical fluid
  • Supercritical water

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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