Oxidation of unsaturated carboxylic acids under hydrothermal conditions

Fangming Jin, Heng Zhong, Jianglin Cao, Jianxun Cao, Kohei Kawasaki, Atsushi Kishita, Takatoshi Matsumoto, Kazuyuki Tohji, Heiji Enomoto

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Hydrothermal oxidation pathways of high molecular weight unsaturated carboxylic acids were investigated for the potential use of chemoselectivity to improve the efficiency of the desired products from bio-masses directly containing or easily producing unsaturated carboxylic acids. Hock cleavage, which frequently occur at general chemical, was observed in the absence of any acid catalyst and may be a potential major oxidation cleavage mechanism, which leads to the cleavage at both the carbon-carbon double bond and the single bond near a double bond. The addition of a peroxyl radical to the double bond may be also a potential major oxidation mechanism, which leads to the oxidation cleavage mainly at the carbon-carbon double bond. Cleavage at the carbon-carbon bond near the double bond by the addition of a peroxyl radical to the double bond may also occur. However, oxidation at either α,β,or γ, carbon to the -COOH group hardly occurred. These results may help to selectively produce desired products from biomasses, such as lignin and oils.

Original languageEnglish
Pages (from-to)7624-7634
Number of pages11
JournalBioresource Technology
Volume101
Issue number19
DOIs
Publication statusPublished - 2010 Jan 1

Keywords

  • Biodiesel
  • Biomass
  • Hydrothermal oxidation
  • Pathways
  • Unsaturated carboxylic acids

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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