Preprint Article Version 1 This version is not peer-reviewed

Improvement of Organosolv Fractionation Performance for Rice Husk through a Low Acid-Catalyzation

Version 1 : Received: 18 April 2019 / Approved: 19 April 2019 / Online: 19 April 2019 (09:52:04 CEST)

A peer-reviewed article of this Preprint also exists.

Kim, T.H.; Ryu, H.J.; Oh, K.K. Improvement of Organosolv Fractionation Performance for Rice Husk through a Low Acid-Catalyzation. Energies 2019, 12, 1800. Kim, T.H.; Ryu, H.J.; Oh, K.K. Improvement of Organosolv Fractionation Performance for Rice Husk through a Low Acid-Catalyzation. Energies 2019, 12, 1800.

Journal reference: Energies 2019, 12, 1800
DOI: 10.3390/en12091800

Abstract

For the effective utilization of rice husk, organosolv fractionation was investigated to separate three main components (glucan, xylose, and lignin) with low acid concentration. Reaction temperatures of 170–190 °C, ethanol concentrations of 50–70% (v/v), and sulfuric acid concentrations of 0–0.7% (w/v) were investigated, with the reaction time and liquid-to-solid ratio kept constant at 60 min and 10, respectively. The fractionation conditions for the efficient separation into the three components of rice husk were determined to be 180 °C, 60% (v/v) of ethanol, and 0.25% (w/v) of sulfuric acid. Under these fractionation conditions, 86.8% of the xylan and 77.5% of the lignin were removed from the rice husk, and xylose and lignin were obtained from the liquid in 67.6% and 49.8% yields, respectively. The glucan digestibility of the fractionated rice husk was 85.2% with an enzyme loading of 15 FPU (filter paper unit) of cellulase per g-glucan.

Subject Areas

biomass; xylan; lignin; cellulose; pretreatment

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