Characterization of dilute acid pretreatment of silvergrass for ethanol production

被引:214
作者
Guo, Gia-Luen [1 ]
Chen, Wei-Hsi [1 ]
Chen, Wen-Heng [1 ]
Men, Lee-Chung [1 ]
Hwang, Wen-Song [1 ]
机构
[1] Inst Nucl Energy Res, Cellulos Ethanol Project, Tao Yuan 32546, Taiwan
关键词
silvergrass; dilute sulfuric acid pretreatment; enzymatic hydrolysis; ethanol production; cellulase;
D O I
10.1016/j.biortech.2007.12.047
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Pretreatment with dilute sulfuric acid of silvergrass was compared with the pretreatment's effect on other commonly used lignocellulosic materials, namely rice straw and bagasse, in order to evaluate the potential of this feedstock for ethanol production. The highest yield of xylose from silvergrass was between 70% and 75%, which was similar to bagasse. However, silvergrass gave a higher level of fermentability than bagasse using the hydrolysate because less acetic acid was formed. The release of sugars resulted in an about 2.0-fold increase in specific surface area of the pretreated silvergrass. Increasing the specific surface area did not obviously enhance enzymatic digestibility. The hydrophilicity of the acid pretreated silvergrass was characterized using its Fourier transform infrared (FTIR) spectra. The increase in hydrophilicity may enhance enzymatic adsorption onto lignin and increase the accumulation of cellobiose for enzymatic hydrolysis as pretreatment severity increases. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:6046 / 6053
页数:8
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