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›› 2008, Vol. 28 ›› Issue (5): 70-76.

• 研究报告 • Previous Articles     Next Articles

Study on Catalytic Thermochemical Liquefaction of Cornstalk

YAN Yong-bin1,2, PANG Hao1, YANG Xiao-xu1,2, LIAO Bing1   

  1. 1. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, CAS, Guangzhou 510650, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2007-10-23 Revised:1900-01-01 Online:2008-10-30 Published:2008-10-30

Abstract: The liquefaction of cornstalk was conducted in polyhydric alcohols under different reaction conditions. The liquefied product was analyzed to investigate the change of its properties during liquefaction process and its components. The results indicated that the liquefaction efficiency was high in the mixed solvents of polyethylene glycol and glycerin (mass ratio 80:20), using sulfuric acid (mass fraction 3%) as catalyst. When liquid/solid mass ratio was 10:2, the residue content was only 8.1% after 180min. In the incipient reaction stage, lignin in cornstalk was liquefied wholly. With the prolongation of liquefaction, residue content decreased gradually, and hydroxyl value of liquefied product also decreased gradually from 375 to 330mg/g, and acid value increased gradually from 13 to 27mg/g;The molecular weight (MW) was 1200-1450. By GC-MS analysis, the liquefied products contained oligomers of polyhydric alcohols,carboxylic acids and their esters because of oxidation and esterification of polyhydric alcohols and the decomposed cornstalk components.

Key words: cornstalk, liquefaction, polyhydric alcohols

CLC Number: