Hydrothermal carbonization of biomass: Major organic components of the aqueous phase

Roland Becker*, Ute Dorgerloh, Ellen Paulke, Jan Mumme, Irene Nehls

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Process waters obtained from hydrothermal carbonization (HTC) of wheat straw, a biogas digestate derived thereof, and four woody biomass feedstocks were quantified regarding the total organic carbon (TOC) and selected organic compounds. HTC runs revealed that TOC loads were largely unaffected by process severity or type of feedstock whereas the C2-C6 fatty acids, determined by GC, displayed clear effects of temperature and feedstock. HPLC demonstrated simultaneously the initial increase and subsequent consumption of cellulose-derived furfural and 5-hydroxymethylfurfural as well as the increase of the lignin-derived 2-methoxyphenol. 2-Methylbenzofuran, an example for a substance potentially harmful to aquatic biota, was observed in high concentration in the HTC liquor from wheat straw-based feedstocks.

Original languageEnglish
Pages (from-to)511-518
Number of pages8
JournalChemical Engineering and Technology
Volume37
Issue number3
DOIs
Publication statusPublished - 1 Mar 2014

Keywords

  • Furfurals
  • Gas chromatography
  • Liquid chromatography
  • Phenols
  • Process water
  • Total organic carbon

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