Journal
ENERGY TECHNOLOGY
Volume 7, Issue 2, Pages 277-287Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201800685
Keywords
Energy; Elm clone biomass; Environment; Fermentable sugars; Lignin-derived biochar
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Funding
- Spanish Ministry of Economy and Competitiveness (MINECO) [CTQ2013-47158-R, RTA2015-00051-00-00, MAT2015-71117-R, PTA2014-09248-I]
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Valorization of lignocellulosic feedstock from a Dutch elm disease tolerant Ulmus minor clone was studied as a new biomass resource. Herein, fermentable sugars and activated carbons from the side-stream lignins were produced. For the sugar extraction organosolv and acid hydrolysis pretreatments prior to enzymatic hydrolysis were compared for the first time for this clone prior to enzymatic hydrolysis; organosolv was more efficient for delignification (49 %), while acid hydrolysis was more efficient at eliminating hemicelluloses (95 %). A high final glucose concentration of 22-23.5 g L-1 was obtained after enzymatic hydrolysis suggesting that this clone can be considered a potential source for glucose-based biofuel production. The side-stream lignins were converted to microporous biochars of high surface area (1220 m(2) g(-1)) and micropore volume (0.42 cm(3) g(-1)). These biochars exhibited excellent properties as electrodes in supercapacitors with a specific capacitance of 118 F g(-1) and a high energy density of 14 Wh kg(-1) at 7000 W kg(-1), while they were also efficient adsorbents in water remediation of model contaminants.
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