乙二醇协同对甲基苯磺酸预处理杨木工艺研究  

Study on the Pretreatment of Poplar Wood with Ethylene Glycol and P-methylbenzene Sulfonic Acid

作　　者：房绍华 杜鹃 张林[1,2] Fang Shaohua;Du Juan;Zhang Lin(Central South University of Forestry and Technology School of Materials Science and Engineering,Changsha 410000;Bioethanol research center of State Forestry Administration,Changsha 410004,China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410000 [2]国家林业草原生物乙醇研究中心,湖南长沙410004

出　　处：《广东化工》2023年第17期1-4,共4页Guangdong Chemical Industry

基　　金：国家重点研发计划课题(2019YFB1503801);湖南省重点研发计划项目(2020WK2019);林业科技推广计划项目([2019]22)。

摘　　要：本研究采用乙二醇协同对甲基苯磺酸对杨木进行预处理,考察了乙二醇-对甲基苯磺酸质量分数、预处理时长、预处理温度对残渣得率、纤维素保留率、木质素脱除率、半纤维素脱除率的影响,并通过扫描电镜(SEM)、傅里叶变换红外光谱仪(FTIR)和X射线衍射(XRD)对预处理后固体残渣的样品形态、结构以及结晶度进行了表征分析,通过分析,表明乙二醇协同对甲基苯磺酸预处理是一种温和高效的拆解分离工艺,其主要去除杨木纤维中的木质素、半纤维素,对纤维素破坏较小,能够提高纤维素酶的可及度,从而增加酶解效率,对木质纤维生物乙醇的生产有重要意义。In this study,ethylene glycol was used to pretreat poplar wood with methyl benzene sulfonic acid.The effects of mass fraction of ethylene glycol-p-methyl benzene sulfonic acid,pretreatment time and pretreatment temperature on residue yield,cellulose retention rate,lignin removal rate and hemicellulose removal rate were investigated.By means of scanning electron microscopy(SEM),Fourier transform infrared spectrometer(FTIR)and X-ray diffraction(XRD),the morphology,structure and crystallinity of the pre-treated solid residue samples were characterized.The results showed that the pretreatment of ethylene glycol with p-methylbenzene sulfonic acid was a mild and efficient disassembly and separation process.It mainly removes lignin and hemicellulose from poplar fiber,and has little damage to cellulose.It can improve the accessibility of cellulase and increase the efficiency of subsequent enzymatic hydrolysis,which is of great significance for the subsequent production of wood fiber bioethanol.

关 键 词：生物乙醇 杨木 预处理 乙二醇 对甲基苯磺酸 

分 类 号：TQ[化学工程]