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Using electro-coagulation treatment to remove phenolic compounds and furan derivatives in hydrolysates resulting from pilot-scale supercritical water hydrolysis of Mongolian oak

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  • Jeong, Hanseob
  • Lee, Jaejung
  • Ju, Young Min
  • Lee, Soo Min

Abstract

In this study, an electro-coagulation treatment is performed to remove phenolic compounds, 5-hydroxymethylfurfural (5-HMF), and furfural from hydrolysates obtained by pilot-scale supercritical water hydrolysis (SCWH) of lignocellulosic biomass. The treatment used aluminum electrodes under various conditions (initial pH: 2.5–11, voltage: 0–10 V, and electrolyte (NaCl) concentration: 0–1.6% (w/v)). Changes in the treatment parameters resulted in more than 40% of phenolic compounds and most of the 5-HMF and furfural being removed from the hydrolysates at the optimal condition (pH 5/10 V/0.8% NaCl/180 min) while the initial sugar (glucose and xylose) concentrations were maintained. Therefore, the electro-coagulation treatment may provide a more effective purification process for sugar production compared to the conventional activated charcoal treatment process, which causes sugar loss (>25%).

Suggested Citation

  • Jeong, Hanseob & Lee, Jaejung & Ju, Young Min & Lee, Soo Min, 2019. "Using electro-coagulation treatment to remove phenolic compounds and furan derivatives in hydrolysates resulting from pilot-scale supercritical water hydrolysis of Mongolian oak," Renewable Energy, Elsevier, vol. 138(C), pages 971-979.
    • Handle: RePEc:eee:renene:v:138:y:2019:i:c:p:971-979
    DOI: 10.1016/j.renene.2019.01.115
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    References listed on IDEAS

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    1. Jambo, Siti Azmah & Abdulla, Rahmath & Mohd Azhar, Siti Hajar & Marbawi, Hartinie & Gansau, Jualang Azlan & Ravindra, Pogaku, 2016. "A review on third generation bioethanol feedstock," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 756-769.
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    3. Adekunle, Ademola & Orsat, Valerie & Raghavan, Vijaya, 2016. "Lignocellulosic bioethanol: A review and design conceptualization study of production from cassava peels," Renewable and Sustainable Energy Reviews, Elsevier, vol. 64(C), pages 518-530.
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