Using trifluoroacetic acid to pretreat lignocellulosic biomass

被引：18

作者：

Dong, Dexian ^{[1
]}

Sun, Jie ^{[1
]}

Huang, Feiyun ^{[1
]}

Gao, Qian ^{[1
]}

Wang, Yi ^{[1
]}

Li, Rongxiu ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, MOE Key Lab Microbial Metab, Coll Life Sci & Biotechnol, Shanghai 200240, Peoples R China

来源：

BIOMASS & BIOENERGY | 2009年 / 33卷 / 12期

关键词：

wheat; Rice; Maize; Sabai grass; Straw; Stover; Xylan; Cellulose; Lignin; Isopropanol; Pichea pastoris; Trifluoroacetic acid; Pretreatment; Lignocellulosic; Biomass conversion; ENZYMATIC-HYDROLYSIS; CELL-WALLS;

D O I：

10.1016/j.biombioe.2009.07.013

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Biomass pretreatment is one of major bottlenecks to convert biomass to bioethanol at present. We found that cereal straw could be completely dissolved in a 10-fold volume excess of trifluoroacetic acid (>= 99%) (TFA). Pretreatment with TFA completely disrupted the dense cellulose crystallinity of the biomass. Further research showed that the TFA dissolved, but did not degrade, the cellulose in the straw. TFA did, however, degrade 65.65% of xylan in the straw, as well as reduce 20.0-23.3% of the acid-insoluble lignin. Isopropanol could precipitate 92.7% of the material dissolved in the TFA solution. These results led us to design a procedure for pretreatment of cellulosic biomass involving a dissolving step with TFA and a precipitation step with isopropanol. Experiments show that the procedure is technically feasible. Moreover, TFA and isopropanol could be completely evaporated off the supernatant and precipitate, and recycled back into the process. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1719 / 1723

页数：5

共 15 条

[1] Substrate pretreatment: The key to effective enzymatic hydrolysis of lignocellulosics? [J].