473194 Physiochemical Characterization of Lignocellulosic Biomass Dissolution By Flowthrough Pretreatment

Thursday, November 17, 2016: 3:15 PM
Union Square 17 & 18 (Hilton San Francisco Union Square)
Bin Yang, Center for Bioproducts & Bioenergy and Biosystems Engimeering, Washington State University Tri-Cities, Richland, WA, Libing Zhang, Washington State University-Tricities, Richland, WA, Yunqiao Pu, Institute of Paper Science and Technology, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, Art Regauskas, The University of Tennessee-Knoxville and John R Cort, Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA

Comprehensive understanding of biomass solubilization chemistry in aqueous pretreatment such as water-only and dilute acid flowthrough pretreatment is of fundamental importance to achieve the goal of valorizing biomass to fermentable sugars and lignin for biofuels production. In this study, poplar wood was flowthrough pretreated by water-only or 0.05% (w/w) sulfuric acid at different temperatures (220-270 °C), flowrate (25 mL/min), and reaction time (8-90 min), resulting in significant disruption of the lignocellulosic biomass. Ion chromatography (IC), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analysis, and solid state cross polarization/magic angle spinning (CP/MAS) 13C nuclear magnetic resonance (NMR) spectroscopy were applied to characterize the pretreated biomass whole slurries in order to reveal depolymerization as well as solubilization mechanism and identify unique dissolution structural features during these pretreatments.

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