Research on Super/Sub-critical Ethanol-water Hydrolysis Cellulose

摘要

Ethanol-water binary mixed solvent hydrolysis cellulose was studied using the method of solvent preheating.Influences of ethanol-watervolume ratio(1∶0.5,1∶1,1∶2,1∶3),,temperature (200 to 280°C), pressure (4.1 to 8.8 MPa) were investigated under the solid –liqiud ratio 1∶20the reaction time 0.58 min,stirring speed 600 r/min.It is concluded that the highest yield ratio of reducing sugar 98.22％ and the lowest crystallinity of cellulose 0.211 can be abtained under conditions of ethanol-water 1∶1,temperature 260°C,pressure 6.2 MPa,the reaction time 0.58 min,stirring speed 600 r/min.