Valorization of lignin by partial wet oxidation using sustainable heteropoly acid catalysts

Abayneh Getachew Demesa, Arto Laari, Mika Sillanp, Tuomas Koiranen

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were used to catalyze the oxidation of lignin under hydrothermal conditions. Factors influencing the total yield of carboxylic acids formed during the partial oxidation of lignin were investigated. Formic, acetic and succinic acids were the major products identified. Of the two catalysts used, phosphomolybdic acid gave the most promising results, with carboxylic acid yields and lignin conversions of up to 45% and 95%, respectively.

Original languageEnglish
Article number1625
JournalMolecules
Volume22
Issue number10
DOIs
Publication statusPublished - Oct 2017
Externally publishedYes

Keywords

  • Catalysts
  • Heteropoly acids
  • Lignin
  • Wet oxidation

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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