期刊
ENERGY
卷 217, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2020.119332
关键词
Bioethanol production; Distillation energy; Liquid hot water; Reed; Alkaline pretreatment
资金
- Natural Science Foundation of China [31770624, 21978029]
- National Key R&D Program of China [2018YFD0400703]
- Liaoning BaiQianWan Talents Program [201945]
The study established a method for producing high-concentration bioethanol from reed with reduced energy demand, achieving a significant increase in bioethanol concentration, reduced distillation energy consumption, and weakening of the interaction among cellulose, hemicellulose, and lignin through lignin and hemicellulose removal after LHW-Na2CO3/O-2 pretreatment.
This study aimed to establish a method of producing high-concentration bioethanol from reed with reduced distillation-energy demand. Reed was subjected to a pretreatment combining liquid hot water (LHW) and sodium carbonate with oxygen (LHW-Na2CO3/O-2) to increase substrate concentration and further achieve high bioethanol concentration through fed-batch semi-simultaneous saccharification and fermentation (fed-batch S-SSF). An oxygen pressure of 0.8 MPa, a Na2CO3 dosage of 16%, a reaction temperature of 160 degrees C, and a reaction time of 60 min were determined to be optimal, resulting in the highest bioethanol concentration (66.5 g L-1). Bioethanol concentration increased by 75.9% and resulted in a 76.6% decrease in distillation energy compared with those obtained by single-stage LHW pretreatment at 170 degrees C. After the LHW-Na2CO3/O-2 pretreatment, the rate of lignin removal was 71.4%, and almost all hemicellulose was removed. Lignin and hemicellulose removal weakened the interactions among cellulose, hemicellulose, and lignin. We focused on the maximum utilization of biomass resources and decrease in energy expenditure, which highlighted the potential use of the combined LHW-Na2CO3/O-2 pretreatment with fed-batch S-SSF method in the industrialization of bioethanol production from reed. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据