Tetrahydrofuran-based two-step solvent liquefaction process for production of lignocellulosic sugars,Reaction Chemistry & Engineering

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Tetrahydrofuran-based two-step solvent liquefaction process for production of lignocellulosic sugars
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-07-22 , DOI: 10.1039/d0re00192a
Arpa Ghosh _{1,

2,

3,

4} , Martin R. Haverly _{3,

4,

5} , Jake K. Lindstrom _{1,

2,

3,

4} , Patrick A. Johnston _{1,

2,

3,

4} , Robert C. Brown _{1,

2,

3,

4,

6}

Affiliation

Large-scale production of biofuels and chemicals will require cost-effective, sustainable, and rapid deconstruction of woody biomass into its constituent sugars. Here, we introduce a novel two-step liquefaction process for producing fermentable sugars from red oak using a mixture of tetrahydrofuran (THF), water and dilute sulfuric acid. THF promotes acid-catalyzed solubilization of lignin and hemicellulose in biomass achieving 61% lignin extraction and 64% xylose recovery in a mild pretreatment step. The pretreatment opens the structure of biomass through delignification and produces a cellulose-rich biomass, which is readily solubilized at low temperature giving 65% total sugar yields in a subsequent liquefaction process employing the same solvent mixture. This process achieves competitive sugar yields at high volumetric productivity compared to conventional saccharification methods. THF, which can be derived from renewable resources, has several benefits as solvent including ease of recovery from the sugar solution and relatively low toxicity and cost.

中文翻译：

基于四氢呋喃的两步溶剂液化工艺生产木质纤维素糖

大规模生产生物燃料和化学药品将需要经济高效，可持续和快速地将木质生物质解构为其成分糖。在这里，我们介绍了一种新颖的两步液化工艺，该工艺使用四氢呋喃（THF），水和稀硫酸的混合物从赤栎生产可发酵糖。THF促进酸催化的生物质中木质素和半纤维素的溶解，在温和的预处理步骤中实现了61％的木质素提取和64％的木糖回收率。预处理通过去木质素作用打开了生物质的结构，并产生了富含纤维素的生物质，该纤维素易于在低温下溶解，在随后的使用相同溶剂混合物的液化过程中，总糖收率为65％。与传统的糖化方法相比，此过程可在高容积生产率下获得具有竞争力的糖产量。可以衍生自可再生资源的四氢呋喃具有多种溶剂优势，包括易于从糖溶液中回收以及相对较低的毒性和成本。

更新日期：2020-08-25

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