木质素CP-GC-MS法裂解行为研究  

Study on Thermal Transformations of Lignin under Curie-point Pyrolysis-GC-MS Conditions

作　　者：刘军利[1,2] 蒋剑春[1] 黄海涛[1] 

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

出　　处：《林产化学与工业》2009年第B10期1-6,11,共7页Chemistry and Industry of Forest Products

基　　金：中央级公益性科研院所基本科研业务费专项资金资助(CAFINT2007C11);国家自然科学基金资助项目(30671649)

摘　　要：采用居里点热裂解-气相色谱-质谱（CP-GC-MS）联用分析技术，以碱木质素为原料，研究了裂解温度对木质素快速裂解产物组成及其含量的影响。结果表明，木质素居裂解主要生成酚类化合物。GC含量可达60％。低温主要生成愈创木酚结构单元为主体的酚类化合物；在300-360℃之间，酚类化合物GC含量随裂解温度升高而提高，愈创木酚基本单元类化合物占主体，占酚类化合物的90％左右；裂解温度进一步提高，酚类化合物GC含量稳定在60％左右，而愈创木酚基本结构单元类化舍物GC含量随温度升高而降低，主要由于愈创木酚基本结构单元断裂成其他酚类和小分子化合物。The influence of temperature on the relative content of pyrolysis products obtained by Curie-point pyrolysis from alkalilignin ,which was considered as the model compound of lignin, was investigated by Curie-point pyrolysis-gas chromatography-mass spectroscopy（CP-GC-MS）. The results showed that phenolic compounds up to GC content 60 % were prepared by the Curiepoint pyrolysis of lignin. The process of Curie-point lignin pyrolysis could be divided into three areas. In the area of less than 300 ℃, lignin was pyrolyzed into phenolic compounds mostly made up of guaiacol-unit. In the area between 300 ℃ and 360 ℃, GC content of phenolic compounds were improved greatly with the enhancement of pyrolysis temperature. Guaiacol-unit compounds reached to 90 % of phenolic compounds. In the area of more than 360 ℃, the GC content of phenolic compounds kept to about 60 % , while the GC content of guaiacol-unit compounds was reduced with the increase of pyrolysis temperature, because guaiacol-unit was broken to form other phenolic compounds and small molecular substances, such as methyl alcohol.

关 键 词：木质素 居裂解 CP-GC-MS 

分 类 号：TQ315.2[化学工程—高聚物工业]