TY - JOUR
T1 - Sustainable biobutanol production using alkali-catalyzed organosolv pretreated cornstalks
AU - Tang, Chenglun
AU - Chen, Yanjun
AU - Liu, Jun
AU - Shen, Tao
AU - Cao, Zhi
AU - Shan, Junqiang
AU - Zhu, Chenjie
AU - Ying, Hanjie
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Biobutanol is an important alternative fuel source, but current processing methods suffer from low yields. This study aimed to develop and optimize a pretreatment protocol for biobutanol production from cornstalks. Fractionation of cornstalks into carbohydrate (cellulose and hemicellulose) and lignin was performed by alkali-catalyzed organosolv pretreatment (ACOS). After optimization of the process parameters, more than 80% of the total lignin was removed, with minimal hemicellulose degradation, at 110 °C, 4% (w/w dry cornstalk) NaOH, 90 min reaction time, and 60% (v/v) ethanol. After enzymatic hydrolysis, the maximum recovery of total monosaccharide was 83.7% (85.0% cellulose, 82.0% hemicellulose). In acetone-butanol-ethanol (ABE) fermentation, a slightly higher total ABE concentration (12.8 g/L vs. 11.9 g/L) was produced from the enzymatic hydrolysate, compared with that from a glucose control. The physical structure and chemical properties of alkali-catalyzed organosolv lignin (ACOSL) showed higher phenolic group content and antioxidant capacity compared with alkali lignin. ACOS pretreatment is an economical method for the production of fermentable monosaccharide and high-value lignin, for use in biofuel production.
AB - Biobutanol is an important alternative fuel source, but current processing methods suffer from low yields. This study aimed to develop and optimize a pretreatment protocol for biobutanol production from cornstalks. Fractionation of cornstalks into carbohydrate (cellulose and hemicellulose) and lignin was performed by alkali-catalyzed organosolv pretreatment (ACOS). After optimization of the process parameters, more than 80% of the total lignin was removed, with minimal hemicellulose degradation, at 110 °C, 4% (w/w dry cornstalk) NaOH, 90 min reaction time, and 60% (v/v) ethanol. After enzymatic hydrolysis, the maximum recovery of total monosaccharide was 83.7% (85.0% cellulose, 82.0% hemicellulose). In acetone-butanol-ethanol (ABE) fermentation, a slightly higher total ABE concentration (12.8 g/L vs. 11.9 g/L) was produced from the enzymatic hydrolysate, compared with that from a glucose control. The physical structure and chemical properties of alkali-catalyzed organosolv lignin (ACOSL) showed higher phenolic group content and antioxidant capacity compared with alkali lignin. ACOS pretreatment is an economical method for the production of fermentable monosaccharide and high-value lignin, for use in biofuel production.
KW - ABE fermentation
KW - Butanol
KW - Cornstalks
KW - Enzymatic hydrolysis
KW - Lignin
KW - Pretreatment
UR - http://www.scopus.com/inward/record.url?scp=85003806606&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2016.10.048
DO - 10.1016/j.indcrop.2016.10.048
M3 - 文章
AN - SCOPUS:85003806606
SN - 0926-6690
VL - 95
SP - 383
EP - 392
JO - Industrial Crops and Products
JF - Industrial Crops and Products
ER -