377358 Fractionation of Corn Stover By Non-Isothermal Flow-through (NIFT) Reaction

Wednesday, November 19, 2014
Galleria Exhibit Hall (Hilton Atlanta)
Gyong Gil Lee1, Roent Dune Cayetano1, Rubee koju Shrestha1, Jun Seok Kim2 and Tae Hyun Kim3, (1)Environmental Engineering, Kongju National University, Cheonan, South Korea, (2)Department of Chemical Engineering, Kyonggi University, Suwon, South Korea, (3)Department of Environmental Engineering, Kongju National University, Cheonan, Chungnam, South Korea

Corn stover was fractionated using a flow-through column reactor system for consecutive recovery of extractives and xylooligomer. During reaction, temperature was gradually increased and solubilized components were recovered in sample cylinders. In this process, hot-water was introduced into the biomass-packed column reactor; effective recovery of extractive including sucrose was achieved with low-temperature treatment around at 60-90°C, which was followed by the fractionation reaction at higher temperature (~210°C). Since temperature increased during reaction with various slopes, it is termed as non-isothermal flow-through (NIFT). Liquid hydrolyzate obtained from the early-stage of fractionation, which is rich in extractives, can be directly used for production of value-added products. Then, hemicellulose recovered in a form of xylooligomer can be recovered separately. The remaining solids after fractionation can be hydrolyzed by enzymes, and then fermented into liquid biofuels or bioproducts.

In this study, various treatment conditions (1) for effective fractionation of extractives and hemicellulose and (2) for effective pretreatment of remaining solids using non-isothermal flow-through reactor system were explored. Chemical compositions, enzymatic digestibility, and fermentability of treated samples will be reported in this paper.

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See more of this Session: Poster Session: Sustainability and Sustainable Biorefineries
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