锯木屑蒸汽爆破预处理制备糠醛的研究  

Preparation of Furfural from Sawdust with Steam-explosion Pretreatment

作　　者：余先纯[1] 吴瑛[1] 易雪静[1] 龚铮午[2] 

机构地区：[1]岳阳职业技术学院基础部中草药综合利用重点实验室,湖南岳阳414000 [2]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《林产化学与工业》2012年第1期99-103,共5页Chemistry and Industry of Forest Products

基　　金：湖南省教育厅资助项目(08D124)

摘　　要：以锯木屑为原料,采用蒸汽爆破进行预处理,然后酸催化提取糠醛。探讨了预处理温度、爆破压力、预处理时间及液料比等因素对糠醛得率的影响。采用响应面法建立二次回归模型,并对预处理工艺进行了优化。研究结果表明:预处理能有效的促进锯木屑的降解,提高糠醛的得率。在预处理温度为216℃、爆破压力1.8 MPa、预处理时间6 min、液料比3∶1(mL∶g)时,糠醛的得率(79.13%)比相同条件下未进行蒸汽爆破预处理的试样(55.35%)提高了23.78个百分点。Furfural was made from sawdust by steam explosion pretreatment and acid hydrolysis in present study. The impacts of temperature, steam pressure, reaction time of steam explosion pretreatment and the ratio of liquid-sawdust on the furfural yield were discussed. The pretreatment was optimized by response surface methodology. The results indicated that the steam explosion pretreatment effectively promoted the degradation of sawdust and resulted in the increase of furfural yield. The furfural yield was 79.13% when the sawdust with 3 ： 1 （ mL： g） liquid/solid ratio was treated by steam explosion at 216 ℃ and 1.8 MPa explosion pressure for 6 min. Compared with the sample without steam explosion pretreatment, only 55.35% furfural yield was obtained.

关 键 词：锯木屑 糠醛得率 蒸汽爆破预处理 

分 类 号：TQ351[化学工程]