Optimization of microwave-assisted calcium chloride pretreatment of corn stover

被引：32

作者：

Li, Hongqiang ^{[1
]}

Xu, Jian ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 127卷

基金：

中国国家自然科学基金;

关键词：

Calcium chloride; Microwave pretreatment; Corn stover; Central composite design; Enzymatic digestibility; DILUTE-ACID PRETREATMENT; ENZYMATIC-HYDROLYSIS; STRAW; DIGESTIBILITY; FEATURES; SCALE;

D O I：

10.1016/j.biortech.2012.09.114

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A 62.5% (w/w) CaCl2 solution was used in the microwave pretreatment of corn stover. The central composite design (CCD) of response surface methodology (RSM) was employed to design and optimize the CaCl2-assisted microwave pretreatment (CaCl2-pretreatment). Temperature and time were the main factors affecting the enzymatic digestibility of corn stover. After CaCl2-pretreatment, hemicellulose degradation reached 85.90%, the specific surface area (SSA) increased by 168.93%, cellulose crystallinity index (CrI) decreased by 13.91% compared to untreated corn stover. The optimal conditions for glucose production with the CaCl2-pretreatment obtained by CCD were, 162.1 degrees C, 12 min and solid-to-liquid ratio 10% (w/v). Under these conditions, the enzymatic hydrolysis ratio of cellulose was 90.66% and glucose recovery was 65.47%. This novel process achieved the temperature of about 160 degrees C necessary for lignocellulose pretreatment under atmospheric pressure using the cheap calcium chloride as the heating medium. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：112 / 118

页数：7

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