Combination of Ionic Liquid and Instant Catapult Steam Explosion Pretreatments for Enhanced Enzymatic Digestibility of Rice Straw
详细信息 查看全文
- 作者：Chen-Guang Liu ; Jin-Cheng Qin ; Li-Yang Liu ; Bo-Wen Jin ; Feng-Wu Bai
- 刊名：ACS Sustainable Chemistry & Engineering
- 出版年：2016
- 出版时间：February 1, 2016
- 年：2016
- 卷：4
- 期：2
- 页码：577-582
- 全文大小：373K
- ISSN：2168-0485
文摘
Lignocellulose rice straw was pretreated by three ionic liquids and instant catapult steam explosion (ICSE), and their effects on feedstock morphology, chemical composition, crystallinity index, thermostability, and glucose yield after enzymatic hydrolysis were investigated. Results showed that ionic liquid performed ideally in separation of lignocellulose components. Compared with the untreated feedstock, the addition of 1-ethyl-3-methylimidazolium acetate ([Emim]Ac) increased the glucose yield by 70.35% thanks to its marvelous solubility for cellulose and lignin. Moreover, the incorporation of ICSE further enhanced the degradation of lignocellulose. Compared to the sole utilization of ionic liquid, ICSE plus ionic liquid increased the glucose yield by 73.38% (1-butyl-3-methylimidazolium chloride, [Emim]Cl) and 74.01% (1-butyl-3-methylimidazolium chloride, [Bmim]Cl), respectively. ICSE tore up the feedstock into small and porous biomass with large specific surface area, which contributed to the superior performance of ionic liquid on rice straw dissolution. The structure changes of feedstock before and after pretreatment were observed by scanning electron microscopy, Fourier transformation infrared spectrometry, X-ray diffraction, and thermogravimetric analysis.