期刊
BIOMASS & BIOENERGY
卷 107, 期 -, 页码 93-101出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2017.09.019
关键词
Sawdust pine; Steam explosion; Fractionation; Hemicelluloses; Enzymatic hydrolysis
资金
- UNAM (National University of Misiones)
- UNLP (National University of La Plata)
- UFPR (Federal University of Parana)
- CONICET (National Council of Scientific and Technical Research)
- CNPq (Brazilian National Council of Science and Technology)
- CYTED-Provalor (Science and Technology for the Development Program-High Value Products from Agricultural and Forestry Wastes Network)
One of the main obstacles to the development of advanced forest biorefineries is the optimal fractionation of the plant biomass. The aim of this work was to design a two-stage process for the fractionation of slash pine sawdust: alkaline deresination for extractives removal and sulfuric acid-catalyzed steam explosion (SE) for hemicellulose extraction. SE was carried out in a high-pressure steam reactor under different conditions of temperature (180 degrees C-200 degrees C), time (5 min-10 min) and acid concentration (1: 100 H2SO4 - 3: 100 H2SO4 (on mass of dry wood)) according to a factorial design. Extractives, lignin, carbohydrates, and degradation by-products were quantified. The effect of pretreatment on enzymatic hydrolysis (EH) was also evaluated. SE was very efficient for hemicelluloses extraction (90% at 200 degrees C with 3: 100 H2SO4 (on mass of dry wood) for 5 min) with a high glucan recovery. EH yield increased 6-fold after SE. There was a trade-off between maximizing carbohydrate recovery, hemicellulose extraction, and cellulose digestibility.
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