Catalytic supercritical water oxidation of wastewater from terephthalic acid manufacturing process

Tae Joon Park, Jong Sung Lim, Youn Woo Lee, Sung Hyun Kim

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

Catalytic oxidation of wastewater from terephthalic acid manufacturing plant has been accomplished in supercritical water. All experiments were performed in an isothermal tubular reactor at pressures from 220 to 300 bar, and temperatures from 418 to 513 °C. A commercial bulk γ-Al2O3 was used as a catalyst in a tubular reactor. At reactor entrance, the initial chemical oxygen demand (COD) concentrations of the wastewater were between 3.99 × 10-3 and 2.81 × 10-2 M; the COD concentrations of wastewater in feed tank were between 2400 and 14917 ppm. The oxygen concentrations at reaction conditions were between 1.4 × 10-3 and 7.4 × 10-3 M, which were the stoichiometric amount needed to oxidize wastewater completely to carbon dioxide. As a result of experiment, the conversion of wastewater was increased with higher wastewater feed concentration, the oxygen concentrations and contact times, and the power-law rate expression that best correlates the experimental results for the conversion of COD to CO2 is rate = -2.67 × 102 exp(-55.456/RT)[COD]0.81[O2]0.49.

Original languageEnglish
Pages (from-to)201-213
Number of pages13
JournalJournal of Supercritical Fluids
Volume26
Issue number3
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Catalytic oxidation
  • Chemical oxygen demand
  • Supercritical water oxidation
  • Terephthalic acid

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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