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林产化学与工业

林产化学与工业 ›› 2010, Vol. 30 ›› Issue (3): 66-72.

• 研究报告 • 上一篇    下一篇

微波液化木材动力学研究及产物分析

冯国东1, 周永红1,3, 郭小昕1, 胡立红1,2   

  1. 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放性实验室;江苏省生物质能源与材料重点实验室, 江苏 南京 210042;2. 中国林业科学研究院 林业新技术研究所, 北京 100091;3. 江苏强林生物能源有限公司, 江苏 溧阳 213364
  • 收稿日期:2009-11-16 修回日期:1900-01-01 出版日期:2010-06-30 发布日期:2010-06-30
  • 通讯作者: 周永红,研究员,博士生导师,从事生物质化学转化与应用研究;E-mail:yhzhou1966@yahoo.com.cn。

Kinetics of Wood Liquefaction Using Microwave Heating and Products Analysis

FENG Guo-dong1, ZHOU Yong-hong1,3, GUO Xiao-xin1, HU li-hong1,2   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab.for Biomass Chemical Utilization; Key and Open Lab.on Forest Chemical Engineering, SFA;Key Lab.of Biomass Energy and Material, Nanjing 210042, China;2. Institute of New Technology of Forestry, CAF, Beijing 100091, China;3. Jiangsu Qianglin Biomass Energy Co., Ltd., Liyang 213364, China
  • Received:2009-11-16 Revised:1900-01-01 Online:2010-06-30 Published:2010-06-30

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摘要： 以醇解的废旧饮料瓶(聚对苯二甲酸乙二醇酯,PET)为液化剂,微波加热液化木材。探讨了反应时间和液化率的关系。实验结果显示木材液化符合二级动力学反应,活化能(Ea)为1.76×105J/mol,指前因子(A)0.891e50.28(s·mol)/L2。通过对液化产物进行分离分析发现,随液化时间的增加得到产物水萃取部分减少而乙酸乙酯萃取部分增加;对比分析不同时间和不同萃取剂得到的产物的GPC和HPLC-MS/MS曲线,得到木质素部分裂解产物的相对分子质量(Mr)在400～200之间,纤维素裂解产物Mr在10000以上;有部分PET碎片和木材成分的液化产物重新聚合生成Mr在10000以上且不溶于水的产物。液化产物的羟值、酸值、黏度都随着时间的增加而增加;对比分析各萃取部分的红外光谱图,相差不大。

关键词: 木材液化, 聚对苯二甲酸乙二醇酯(PET), 动力学, 产物分析, GPC, HPLC-MS/MS

Abstract: Wood liquefacient was carried out from alcoholysis of waste bottles (polyethylene terephthalate,PET) using microwave irradiation. The relationship between the rate of liquefaction and time was discussed. The results showed that wood liquefaction obeys the second-order kinetics. Liquefaction activation eneryy Eawas 1.76×105 and pre-exponetial factor A was 0.891e50.28(s·mol)/L2. Percentage content of water-solubles decreased and that of ethyl acetate-solubles increased with the increase of liquefaction time. The products of different liquefaction time and different extraction of GPC and HPLC-MS/MS analyses showed that, the relative molecular mass (Mr) of lignin pyrolysis products were 400-200. The Mr of cellulose pyrolysis products was more than 10 000. The Mr of water-insoluble products from some PET debris and re-polymerization of liquefied products was more than 10 000.The hydroxyl value, acid value and viscosity (25℃) of the products increased with the increase of time. The infrared spectra of each extract fraction had little difference.

Key words: wood liquefaction, polyethylene terephthalate, kinetics, products analysis, GPC, HPLC-MS/MS

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