Assessing the Facile Pretreatments of Bagasse for Efficient Enzymatic Conversion and Their Impacts on Structural and Chemical Properties

被引：59
作者：
Satlewal, Alok [1 ,2 ,3 ]
Agrawal, Ruchi [1 ,3 ]
Das, Parthapratim [1 ]
Bhagia, Samarthya [1 ]
Pu, Yunqiao [2 ]
Puri, Suresh Kumar [3 ]
Ramakumar, S. S. V. [3 ]
Ragauskas, Arthur J. [1 ,2 ,4 ]
机构：
[1] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA
[2] Oak Ridge Natl Lab, Biosci Div, Joint Inst Biol Sci, Oak Ridge, TN 37831 USA
[3] Indian Oil Corp Ltd, Dept Bioenergy, Ctr Res & Dev, DBT IOC Ctr Adv Bioenergy Res,Sect 13, Faridabad 121007, India
[4] Univ Tennessee, Dept Forestry Wildlife & Fisheries, Ctr Renewable Carbon, Inst Agr, Knoxville, TN 37996 USA
来源：
ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2019年 / 7卷 / 01期
关键词：
sugar cane bagasse; deep eutectic solvents; lignin; pretreatment; ionic liquid; DEEP EUTECTIC SOLVENTS; STATE 2D NMR; LIGNOCELLULOSIC BIOMASS; SUGARCANE BAGASSE; BETA-GLUCOSIDASE; STEAM EXPLOSION; IONIC LIQUIDS; DILUTE-ACID; RICE STRAW; LIGNIN;
D O I：
10.1021/acssuschemeng.8b04773
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Novel and sustainable pretreatment approaches are desired to improve the techno-commercial feasibility of biorefineries in the future. In this study, 10 renewable deep eutectic solvents (DESs) were evaluated for their pretreatment efficiency at facile conditions with sugar cane bagasse as substrate and compared with conventional pretreatment approaches (dilute alkali, dilute acid, and ionic liquid (IL)) for lignin removal, saccharification yield, cellulose accessibility, crystallinity, and physiochemical properties. Although, the highest delignification was obtained with dilute alkali (S9.7%) and choline chloride:lactic acid or ChCl:LA (50.6%), the maximum enzymatic conversion of 98.0% and 90.4% was observed with IL (1-butyl-3-methylimidazolium acetate) and ChCl:LA, respectively. uclear magnetic resonance analysis of ChCl:LA-derived lignin showed selective removal of guaiacyl lignin without condensation structure formation observed. Interestingly, unlike IL, the lignin was substantially depolymerized after ChCl:LA pretreatment as determined by gel permeation chromatography. Further, high compatibility of ChCl:LA with cellulase in comparison of IL with easy recyclability and recycling showed that DESs synthesized from a renewable resource are promising "green" solvents for future biorefinery operations.
引用
收藏
页码：1095 / 1104
页数：19
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