Kinetics of Acetic Acid Pretreatment Catalyzed by Fe(NO3)3 of Corn Stover

摘要

Corn stover was treated with acetic acid in presence of Fe(NO3)3 as catalyst to enhance its sugar yields in the hydrolysis. Kinetics of acetic acid pretreatment catalyzed by Fe(NO3)3 was investigated in order to verify the feasibility of the catalytic reaction. The results showed that Fe(NO3)3 could effectively improve the hydrolysis rate of hemicelluloses and cellulose. Ferric nitrate not only greatly increase the rate of xylose and glucose formed (k1), but also decrease the degradation rate of the sugar formed (k2). When pretreatment catalyzed by Fe(NO3)3. selectivity coefficient S value, that is the ratio of hydrolysis rate k1 to degradation rate K2, are more than 1 and it increases gradually with the increase of acetic acid concentration.