期刊
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
卷 -, 期 114, 页码 -出版社
JOURNAL OF VISUALIZED EXPERIMENTS
DOI: 10.3791/54246
关键词
Environmental Sciences; Issue 114; Biomass; Pretreatment; Deconstruction; Ionic Liquids; Low-cost; Synthesis; Protic Ionic Liquids; Lignocellulose; Lignin; Enzymatic hydrolysis; Second Generation Biofuels; Cellulose; Chemical Engineering
资金
- Grantham Institute for Climate Change and Environment, Climate-KIC
- EPSRC [EP/K038648/1, EP/ K014676/1]
- Engineering and Physical Sciences Research Council [EP/K014676/1, 1370826, 1695458, EP/K038648/1] Funding Source: researchfish
- EPSRC [EP/K038648/1, EP/K014676/1] Funding Source: UKRI
A number of ionic liquids (ILs) with economically attractive production costs have recently received growing interest as media for the delignification of a variety of lignocellulosic feedstocks. Here we demonstrate the use of these low-cost protic ILs in the deconstruction of lignocellulosic biomass (Ionosolv pretreatment), yielding cellulose and a purified lignin. In the most generic process, the protic ionic liquid is synthesized by accurate combination of aqueous acid and amine base. The water content is adjusted subsequently. For the delignification, the biomass is placed into a vessel with IL solution at elevated temperatures to dissolve the lignin and hemicellulose, leaving a cellulose-rich pulp ready for saccharification (hydrolysis to fermentable sugars). The lignin is later precipitated from the IL by the addition of water and recovered as a solid. The removal of the added water regenerates the ionic liquid, which can be reused multiple times. This protocol is useful to investigate the significant potential of protic ILs for use in commercial biomass pretreatment/lignin fractionation for producing biofuels or renewable chemicals and materials.
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