Dilute Acid pretreatment of corncob for efficient sugar production.
Aqueous dilute acid pretreatments of corncob were conducted using cylindrical pressure vessels in an oil bath. Pretreatments were conducted in a temperature range of 160-190 °C with acid-solution-to-solid-corncob ratio of 2. The acid concentration (v/v) in the pretreatment solution was varied from 0% to 0.7%, depending on temperature. This gives acid charge on ovendry-weight corncob of 0-2.58%. It was found that optimal pretreatment temperature is between 160 and 170 °C based on total xylose and glucose yields and thermal energy consumption in pretreatment. At 170 °C and acid charge of 2.2% on cob, total glucose yield and xylose recovery were 97% and 75%, respectively, which resulted in an overall monomeric sugar recovery of about 88%. Xylose concentration in the hydrolysate was about 12%, with xylose-to-acetic-acid ratio of 8 and to furan (furfural and hydroxymethylfurfural) of about 15.
Wang
G S
GS
TianJin Key Laboratory of Pulp and Paper, TianJin University of Science and Technology, TianJin, China.
Lee
Jae-Won
JW
Zhu
J Y
JY
Jeffries
Thomas W
TW
D000085:Acetates / Q000737:chemistry; D001709:Biotechnology / Q000379:methods*; D002241:Carbohydrates / Q000737:chemistry*; D005663:Furans / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D014994:Xylose / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry*
D000085:Acetates; D002241:Carbohydrates; D005663:Furans; D014994:Xylose; D005947:Glucose; C039281:furan