木质纤维生物质加压液化制备烷基糖苷类精细化学品过程研究  

STUDY ON PREPARATION OF ALKYL GLYCOSIDE FINE CHEMICALS BY PRESSURIZED LIQUEFACTION OF LIGNOCELLULOSIC BIOMASS

作　　者：苏秋丽[1] 蒋剑春[1,2] 冯君锋 李芳琳 徐俊明 Su Qiuli;Jiang Jianchun;Feng Junfeng;Li Fanglin;Xu Junming(Institute of Chemical Industry of Forest Products,CAF,National Engineering Lab for Biomuss Chemical Utilization,Key and Open Lab of Forest Chemical Engineering,SFA ,Jiangsu Province Key Lab of Biomass Energy and Materials,Nanjing 210042,China;Jiangsu Qianglin Bio-energy and Bio-materials Co.,Ltd.,Liyang 213364,China)

机构地区：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局林产化学工程重点开发实验室,江苏省生物质能源与材料重点实验室,南京210042 [2]江苏强林生物能源材料有限公司,溧阳213364

出　　处：《太阳能学报》2018年第12期3483-3489,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(31530010);中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2014ZD003)

摘　　要：以杨木为研究对象,阐明加压液化过程中木质纤维结构变化规律和产物的形成机理,合成理化性质相近的糖苷类化合物,为液化产物的高值化利用提供新的途径。结果表明:当m杨木∶m甲醇=1∶12、浓硫酸2.5%(以杨木质量为基准)、反应时间10 min、反应温度200℃的条件下,液化转化率为78.20%,甲基糖苷得率为57.76%。气相色谱仪-质谱联用仪(GC-MS)、液相色谱仪(HPLC)分析表明,在120～180℃之间主要是半纤维素分解,200℃后,以纤维素分解为主。X射线衍射(XRD)、扫描电子显微镜(SEM)结果显示,在120～200℃之间,由于非结晶区木质素和半纤维素降解,液化残渣纤维结晶度相对提高20%～50%,当反应温度超过200℃,由于纤维素结晶区破坏,结晶度降低约12%。Taking poplar as the research object,the changes of lignocellulosic structure and the formation mechanism of the product during the process of pressurized liquefaction are clarified and the glycosidic compounds with similar physical and chemical properties are synthesized to provide a new way for the high value utilization of liquefied products. The results show that when the optimal conditions are mpoplar:mCH3OH=1:12,the dosage of concentrated sulfuric acid is 2.5%(based on the quantity of poplar),reaction time is 10min and reaction temperature is 200℃,the liquefaction conversion rate is 78.20% and the yield of methyl glucoside is 57.76%.The methyl glucoside is characterized by Gas Chromatography-Mass Spectrometer (GC-MS)and High Performance Liquid Chromatography (HPLC)analysis,and the results show that it is mainly decomposed by hemicellulose at 120-180℃,and decomposed by cellulose after 200℃. The liquefaction residue is characterized by X-ray Diffraction (XRD)and Transmission Electron Microscopy (SEM). The results show that in 120-200℃,due to the degradation of lignin and hemicellulose in the amorphous zone,the crystallinity of the liquefied residue fiber is increased by 20%-50%.When the reaction temperature exceeds 200℃,the crystallinity decreases 12% due to the destruction of the cellulose crystal region.

关 键 词：木质纤维 加压液化 液化机理 甲基糖苷 

分 类 号：TQ35[化学工程]