438890 Catalytic Ionic Liquids for Biomass Conversion and Upgrading

Tuesday, November 10, 2015: 3:15 PM
257A (Salt Palace Convention Center)
Dajiang Liu, Deconstruction Division, Joint Bioenergy Institute, Emeryville, CA

Owing to its unique ability to dissolve lignocellulosic biomass under relatively mild conditions, 1-ethyl-3-methylimidazolium acetate, [C2C1im][OAc], has attracted rapidly growing interest as a solvent in biomass pretreatment. However, the catalysis role of [C2C1im][OAc] has been least studied for producing downstream platform chemicals in replacement of petro-derived chemicals. Herein, [C2C1im][OAc] is identified as an efficient catalyst for lignin depolymerization and sugar upgrading into platform chemicals under mild conditions. Specifically, [C2C1im][OAc] renders efficient lignin depolymerization into phenol derivatives (e.g., guaiacol and eugenol) in the presence of catalysts near 100 °C within 3 h; The carbene generated in the presence of [C2C1im][OAc] leads to quantitative self-condensation of 5-hydroxymethylfurfural (HMF) to a high-value biorefinery product, 5,5’-di(hydroxymethyl)furoin (DHMF)-a potential C12 kerosene/jet fuel intermediate through benzoin condensation. More catalytic reactions based on [C2C1im][OAc] have been proposed.

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