Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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DOI：
10.3791/54246
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发表时间：
2016-08-01
影响因子：
1.2
通讯作者：
Hallett, Jason P.
中科院分区：
文献类型：
--
作者：
Gschwend, Florence J. V.;Brandt, Agnieszka;Hallett, Jason P.
近年来，离子液体作为木质纤维原料脱木质素的介质，具有很高的生产成本和经济效益。在这里，我们证明了使用这些低成本的质子离子液体在解构木质纤维素生物质（Ionosolv预处理），产生纤维素和纯化的木质素。在最通用的方法中，质子离子液体通过含水酸和胺碱的精确组合来合成。随后调节水含量。对于脱木质素，在升高的温度下将生物质置于具有IL溶液的容器中以溶解木质素和半纤维素，留下富含纤维素的纸浆准备用于糖化（水解成可发酵糖）。木质素随后通过添加水从IL中沉淀并作为固体回收。除去添加的水使离子液体再生，其可以多次重复使用。该协议是有用的，以调查的显着潜力的质子离子液体用于商业生物质预处理/木质素分馏生产生物燃料或可再生的化学品和材料。
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.