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Open AccessArticle

Toward Complete Utilization of Miscanthus in a Hot-Water Extraction-Based Biorefinery

Department of Paper and Bioprocess Engineering, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA
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Energies 2018, 11(1), 39; https://doi.org/10.3390/en11010039
Received: 31 October 2017 / Revised: 20 December 2017 / Accepted: 21 December 2017 / Published: 25 December 2017
Miscanthus (Miscanthus sp. Family: Poaceae) was hot-water extracted (two h, at 160 °C) at three scales: laboratory (Parr reactor, 300 cm3), intermediate (M/K digester, 4000 cm3), and pilot (65 ft3-digester, 1.841 × 106 cm3). Hot-water extracted miscanthus, hydrolyzate, and lignin recovered from hydrolyzate were characterized and evaluated for potential uses aiming at complete utilization of miscanthus. Effects of scale-up on digester yield, removal of hemicelluloses, deashing, delignification degree, lignin recovery and purity, and cellulose retention were studied. The scale-dependent results demonstrated that before implementation, hot-water extraction (HWE) should be evaluated on a scale larger than a laboratory scale. The production of energy-enriched fuel pellets from hot-water extracted miscanthus, especially in combination with recovered lignin is recommended, as energy of combustion increased gradually from native to hot-water extracted miscanthus to recovered lignin. The native and pilot-scale hot-water extracted miscanthus samples were also subjected to enzymatic hydrolysis using a cellulase-hemicellulase cocktail, to produce fermentable sugars. Hot-water extracted biomass released higher amount of glucose and xylose verifying benefits of HWE as an effective pretreatment for xylan-rich lignocellulosics. The recovered lignin was used to prepare a formaldehyde-free alternative to phenol-formaldehyde resins and as an antioxidant. Promising results were obtained for these lignin valorization pathways. View Full-Text
Keywords: miscanthus; hot-water extraction; scale-up; lignin as an antioxidant; lignin-based formaldehyde-free resins; enzymatic hydrolysis miscanthus; hot-water extraction; scale-up; lignin as an antioxidant; lignin-based formaldehyde-free resins; enzymatic hydrolysis
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MDPI and ACS Style

Wang, K.-T.; Jing, C.; Wood, C.; Nagardeolekar, A.; Kohan, N.; Dongre, P.; Amidon, T.E.; Bujanovic, B.M. Toward Complete Utilization of Miscanthus in a Hot-Water Extraction-Based Biorefinery. Energies 2018, 11, 39. https://doi.org/10.3390/en11010039

AMA Style

Wang K-T, Jing C, Wood C, Nagardeolekar A, Kohan N, Dongre P, Amidon TE, Bujanovic BM. Toward Complete Utilization of Miscanthus in a Hot-Water Extraction-Based Biorefinery. Energies. 2018; 11(1):39. https://doi.org/10.3390/en11010039

Chicago/Turabian Style

Wang, Kuo-Ting; Jing, Chengyan; Wood, Christopher; Nagardeolekar, Aditi; Kohan, Neil; Dongre, Prajakta; Amidon, Thomas E.; Bujanovic, Biljana M. 2018. "Toward Complete Utilization of Miscanthus in a Hot-Water Extraction-Based Biorefinery" Energies 11, no. 1: 39. https://doi.org/10.3390/en11010039

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