Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures,Green Chemistry

当前位置： X-MOL 学术 › Green Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures
Green Chemistry ( IF 9.3 ) Pub Date : 2018-06-29 , DOI: 10.1039/c8gc00837j
Florence J. V. Gschwend _{1,

2,

3,

4} , Francisco Malaret _{1,

2,

3,

4} , Somnath Shinde _{1,

2,

3,

4} , Agnieszka Brandt-Talbot _{1,

2,

3,

4} , Jason P. Hallett _{1,

2,

3,

4}

Affiliation

Deconstruction with low-cost ionic liquids (ionoSolv) is a promising method to pre-condition lignocellulosic biomass for the production of renewable fuels, materials and chemicals. This study investigated process intensification strategies for ionoSolv pretreatment of Miscanthus × giganteus with the low-cost ionic liquid triethylammonium hydrogen sulfate ([TEA][HSO₄]) in the presence of 20 wt% water, using high temperatures and a high solid to solvent loading of 1 : 5 g/g. The temperatures investigated were 150, 160, 170 and 180 °C. We discuss the effect of pretreatment temperature on lignin and hemicellulose removal, cellulose degradation and enzymatic saccharification yields. We report that very good fractionation can be achieved across all investigated temperatures, including an enzymatic saccharification yield exceeding 75% of the theoretical maximum after only 15 min of treatment at 180 °C. We further characterised the recovered lignins, which established some tunability of the hydroxyl group content, subunit composition, connectivity and molecular weight distribution in the isolated lignin while maintaining maximum saccharification yield. This drastic reduction of pretreatment time at increased biomass loading without a yield penalty is promising for the development of a commercial ionoSolv pretreatment process.

中文翻译：

使用低成本离子液体硫酸三乙铵硫酸氢盐在高温下快速预处理芒草

用低成本离子液体（ionoSolv）解构是一种有前途的预处理木质纤维素生物质的方法，用于生产可再生燃料，材料和化学品。本实验研究过程强化策略的ionoSolv预处理芒草×巨与低成本的离子液体硫酸氢三乙基铵（[TEA] [HSO ₄]）在20 wt％的水存在下，使用高温和1：5 g / g的高固体/溶剂负载量。研究的温度为150、160、170和180°C。我们讨论了预处理温度对木质素和半纤维素去除，纤维素降解和酶促糖化产率的影响。我们报告说，在所有研究的温度下都可以实现非常好的分馏，包括在180°C下仅处理15分钟后，酶促糖化率超过理论最大值的75％。我们进一步表征了回收的木质素，在分离的木质素中建立了羟基含量，亚基组成，连接性和分子量分布的一些可调性，同时保持了最大的糖化收率。

更新日期：2018-07-30

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11