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Assessment of the effects of process water recirculation on the surface chemistry and morphology of hydrochar

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  • Arauzo, P.J.
  • Olszewski, M.P.
  • Wang, X.
  • Pfersich, J.
  • Sebastian, V.
  • Manyà, J.
  • Hedin, N.
  • Kruse, A.

Abstract

The effect of two process water (PW) recirculation strategies after hydrothermal carbonization (HTC) of brewers spent grains (BSG) is evaluated with the focus on the hydrochar characteristics. The HTC process has been carried out under different operating conditions, which are residence time between 2 and 4 h and temperature in the range of 200–220 °C. The composition of the hydrochars reveals that operating conditions have a more significant effect than PW recirculation. The composition of the liquid produced by HTC with PW recirculation is essentially controlled by the operating temperature, for instance, the total organic carbon (TOC) in the PW changes in the narrow range of 200–220 °C. A detailed analysis of PW also has been done. The main components of the liquid phase are lactic, formic, acetic, levulinic, and propionic acid as well as 5-hydroxymethylfurfural, that affect the surface structure of the hydrochars.

Suggested Citation

  • Arauzo, P.J. & Olszewski, M.P. & Wang, X. & Pfersich, J. & Sebastian, V. & Manyà, J. & Hedin, N. & Kruse, A., 2020. "Assessment of the effects of process water recirculation on the surface chemistry and morphology of hydrochar," Renewable Energy, Elsevier, vol. 155(C), pages 1173-1180.
    • Handle: RePEc:eee:renene:v:155:y:2020:i:c:p:1173-1180
    DOI: 10.1016/j.renene.2020.04.050
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    1. Barbera, Elena & Bertucco, Alberto & Kumar, Sandeep, 2018. "Nutrients recovery and recycling in algae processing for biofuels production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 28-42.
    2. Pablo J. Arauzo & Maciej P. Olszewski & Andrea Kruse, 2018. "Hydrothermal Carbonization Brewer’s Spent Grains with the Focus on Improving the Degradation of the Feedstock," Energies, MDPI, vol. 11(11), pages 1-15, November.
    3. Chiaramonti, David & Prussi, Matteo & Buffi, Marco & Rizzo, Andrea Maria & Pari, Luigi, 2017. "Review and experimental study on pyrolysis and hydrothermal liquefaction of microalgae for biofuel production," Applied Energy, Elsevier, vol. 185(P2), pages 963-972.
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    2. Wądrzyk, Mariusz & Korzeniowski, Łukasz & Plata, Marek & Janus, Rafał & Lewandowski, Marek & Michalik, Marek & Magdziarz, Aneta, 2023. "Pyrolysis of hydrochars obtained from blackcurrant pomace in single and binary solvent systems," Renewable Energy, Elsevier, vol. 214(C), pages 383-394.
    3. Antonio Picone & Maurizio Volpe & Antonio Messineo, 2021. "Process Water Recirculation during Hydrothermal Carbonization of Waste Biomass: Current Knowledge and Challenges," Energies, MDPI, vol. 14(10), pages 1-14, May.
    4. Aragon-Briceño, Christian & Pożarlik, Artur & Bramer, Eddy & Brem, Gerrit & Wang, Shule & Wen, Yuming & Yang, Weihong & Pawlak-Kruczek, Halina & Niedźwiecki, Łukasz & Urbanowska, Agnieszka & Mościcki,, 2022. "Integration of hydrothermal carbonization treatment for water and energy recovery from organic fraction of municipal solid waste digestate," Renewable Energy, Elsevier, vol. 184(C), pages 577-591.

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