474787 Liquefaction of Lignocellulose

Tuesday, November 15, 2016: 4:30 PM
Union Square 19 & 20 (Hilton San Francisco Union Square)
Neal Hengge1, Daehwan Kim1, Nathan S. Mosier2, Youngmi Kim3, Eduardo Ximenes3, Michael R. Ladisch4, Fernanda Cunha5, A. C. Badino5 and Cristiane Sanchez Farinas6, (1)LORRE, Purdue University, West Lafayette, IN, (2)Agricultural and Biological Engineering & Laboratory of Renewable Resources Engineering (LORRE), Purdue University, West Lafayette, IN, (3)Laboratory of Renewable Resources Engineering (LORRE), Purdue University, West Lafayette, IN, (4)Laboratory of Renewable Resources Engineering Department, Purdue University, West Lafayette, IN, (5)Federal University of São Carlos, São Carlos, Brazil, (6)EMBRAPA, São Carlos, Brazil

The liquefaction of biomass materials is a process where particulate wood, corn stover, sugarcane bagasse and other forms of lignocellulose feedstocks are converted to an aqueous suspension of solid materials that is suitable for further processing to fermentable sugars and biofuel materials. A number of reports have described the liquefaction of pretreated materials using either cellulose enzyme or an enzyme biomimetic (maleic acid). Our work has evolved to begin to examine the liquefaction of lignocellulosic substrates at 25% solids loading prior to pretreatment, since the ability to obtain pumpable slurries prior to pretreatment has significant benefits in equipment design and operating conditions for the pretreatment step itself. Challenges in obtaining pumpable slurries of biomass materials, either pre- or post-pretreatment include the shear thinning character of the slurry, mixing of the particulate biomass during the liquefaction process, and definition of operating conditions that make efficient use of the biocatalysts required for the liquefaction process. This paper presents an analysis of the insoluble particle characteristics that enable slurries to be obtained, and proposes a model for the liquefaction process that relates particle size, shape, and composition to the liquefaction process.

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See more of this Session: Distributed Bioprocessing for Integrated Biorefineries
See more of this Group/Topical: Sustainable Engineering Forum