20-4 Comparison of CELF, Cu-AHP, and OP-HG ionic liquid pretreatment of hardwoods: hydrolysis yields, comprehensive mass balances, and lignin properties
Thursday, April 28, 2016: 2:45 PM
Key Ballroom 9-10, 2nd fl (Hilton Baltimore)
A. Bhalla, Department of Biochemistry & Molecular Biology and DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA; C. Cai, Bourns College of Engineering, University of California Riverside, and BioEnergy Science Center, Oak Ridge National Laboratory, Riverside, CA, USA; F. Xu and B.A. Simmons, Joint BioEnergy Institute / Sandia National Laboratories, Emeryville, CA, USA; R. Kumar, Center for Environmental Research and Technology, Bourns College of Engineering,University of California Riverside, Riverside, CA, USA; S. Singh, Joint BioEnergy Institute, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Emeryville, CA, USA; C.E. Wyman, Center for Environmental Research and Technology, Bourns College of Engineering, University of California Riverside, and BioEnergy Science Center, Oak Ridge National Laboratory, Riverside, CA, USA; D.B. Hodge, Department of Chemical Engineering and Materials Science and DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA; E. Hegg*, Michigan State University, East Lansing, MI, USA
In this work, three pretreatments under investigation at the DOE Bioenergy Research Centers (BRCs) are subjected to a side-by-side comparison to assess their performance on model bioenergy hardwoods. These will include co-solvent enhanced lignocellulosic fractionation (CELF), ionic liquid with one pot high gravity pretreatment (OP-HG), and Cu-catalyzed alkaline hydrogen peroxide pretreatment (Cu-AHP). The pretreatments will be individually optimized for the feedstock and common performance metrics as assessed by a single lab will be used as a basis of comparison.  The first component of this will be to assess the susceptibility of the pretreated biomass to hydrolysis by cellulolytic enzymes.  This reactivity will be related to both structural and compositional changes to plant cell wall as a consequence of pretreatment.  The second component will be to determine comprehensive mass balances on the pretreatments.  This will include assessing the solubilization, depolymerizaiton, and conversion of cell wall biopolymers as well as the solvent requirements, their degradation, and theirpotential for reuse. An important feature of the pretreatments in this study is that all three have shown preliminary evidence of yielding lignins with properties amenable to further valorization.  As the final component of this work, we will characterize the yields, structural properties, and reactivity of the soluble and insoluble lignin fractions generated by these pretreatments.
Back to Session: Pretreatment and Fractionation III- Ionic Liquids and Organic Solvents
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