Chemical and morphological changes in hydrochars derived from microcrystalline cellulose and investigated by chromatographic, spectroscopic and adsorption techniques

Mamadou Diakité*, Andrea Paul, Christian Jäger, Judith Pielert, Jan Mumme

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Hydrothermal carbonization (HTC) can be used for converting the biomass into a carbon-rich material, whose application as a fuel requires higher heating value, whereas soil amendment needs stable carbon. This work was focused on the characterization of hydrochars derived from microcrystalline cellulose. The chars were investigated using elemental analysis, Brunauer-Emmett-Teller technique, nuclear magnetic resonance spectroscopy, Raman, Fourier transform infrared, and electron spin resonance spectroscopy. Severity in temperature between 230 and 270. °C with reaction times between 2 and 10. h only affect the carbon content moderately. The results show that aromatization of HTC chars correlates well with temperature, which was further supported by the increase of organic radicals with decreasing g values at higher temperatures. Based on these results, the energetic use of chars favors mild HTC (T<. 230. °C and t≤. 6. h), while the soil amendement favors serve conditions (T≥. 230. °C, and t>. 6. h).

Original languageEnglish
Pages (from-to)98-105
Number of pages8
JournalBioresource technology
Volume150
DOIs
Publication statusPublished - 1 Dec 2013

Keywords / Materials (for Non-textual outputs)

  • ATR-FTIR-spectroscopy
  • Hydrochar
  • Hydrothermal carbonization
  • Microcrystalline cellulose
  • NMR-spectroscopy

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