Bioprocess Group, Hindustan Petroleum Green R & D Center, KIADB Industrial Area, Devanagonthi, Bengaluru 560067, India.
Bioprocess Group, Hindustan Petroleum Green R & D Center, KIADB Industrial Area, Devanagonthi, Bengaluru 560067, India.
Bioresour Technol. 2018 Oct;265:573-576. doi: 10.1016/j.biortech.2018.06.002. Epub 2018 Jun 12.
A novel ternary system consisting of deep eutectic solvent-alcohol (DES-OL) mixture was developed for the effective delignification of lignocellulosic biomass. Optimization studies included selecting suitable co-solvent (among n-BuOH, n-PrOH & EtOAc) for treating biomass (rice husk, rice straw and wheat straw), altering the DES-to-alcohol ratio (2:1, 1:1 and 1:2) as well as the reaction temperature (50, 80 and 120 °C). The highest delignification (∼50%) was observed using n-butanol assisted DES (ChCl: OA) at a ratio of 2:1, with high solid loading of 15% (w/v) at 120 °C (∼1.2 bar) in a 60 min reaction. Post pretreatment, high purity lignin was recovered after distilling off butanol for recycling. Microscopy and CPMAS/NMR studies confirmed the effectiveness of DES-OL pretreatment on biomass delignification.
开发了一种由深共晶溶剂-醇（DES-OL）混合物组成的新型三元体系，用于有效脱木质素木质纤维素生物质。优化研究包括选择合适的共溶剂（正丁醇、正丙醇和乙酸乙酯）来处理生物质（稻壳、稻草和麦草），改变 DES 与醇的比例（2:1、1:1 和 1:2）以及反应温度（50、80 和 120°C）。使用正丁醇辅助 DES（ChCl：OA）在 2:1 的比例下，在 120°C（约 1.2 巴）下以 15%（w/v）的高固体负载量在 60 分钟的反应中观察到最高的脱木质素率（约 50%）。预处理后，蒸馏出丁醇进行回收后，可回收高纯度木质素。显微镜和 CPMAS/NMR 研究证实了 DES-OL 预处理对生物质脱木质素的有效性。
