Depolymerization of stalk cellulose during its liquefaction in sub- and supercritical ethanol

ZHENG Chao-yang; XIE Xin-an; TAO Hong-xiu; ZHENG Lu-si; LI Yan

Volume 40 Issue 05

May 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(05): 526-532

ZHENG Chao-yang, XIE Xin-an, TAO Hong-xiu, ZHENG Lu-si, LI Yan. Depolymerization of stalk cellulose during its liquefaction in sub- and supercritical ethanol[J]. Journal of Fuel Chemistry and Technology, 2012, 40(05): 526-532.

Citation:

ZHENG Chao-yang, XIE Xin-an, TAO Hong-xiu, ZHENG Lu-si, LI Yan. Depolymerization of stalk cellulose during its liquefaction in sub- and supercritical ethanol[J]. Journal of Fuel Chemistry and Technology, 2012, 40(05): 526-532.

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Depolymerization of stalk cellulose during its liquefaction in sub- and supercritical ethanol

College of Food Science, South China Agriculture University, Guangzhou 510641, China

Funds: 国家自然科学基金(21176097);广东省科技计划国际合作项目(2009B050700037)。

Received Date: 2011-07-27
Rev Recd Date: 2011-10-20
Publish Date: 2012-05-31

Abstract

Abstract

Direct liquefaction of cornstalk cellulose in sub-/super-critical ethanol was investigated with a batch reactor at 200～330 ℃ and an initial usage of ethanol varying from 0 to 150 mL. The results show that the reaction temperature, ethanol quantity and retention time significantly influence the direct liquefaction of cornstalk cellulose. The yields of heavy oil and gases increase by 12.55% and 28.83% respectively, depending on reaction temperature from 200 to 330 ℃. The reaction pressure increases with the increment of ethanol, and the yield of residues and gases reduces by 11.10% and 8.44% in supercritical ethanol compared with that from thermal cracking without ethanol. The FT-IR analyses for residues and GC/MS measurements for the oils reveal that cornstalk cellulose was liquefied through deploymerization in supercritical ethanol, and the main components of oils are ketone and ethyl ester and their derivatives.
- sub-/super-critical ethanol,
- stalk cellulose,
- deploymerization,
- liquefaction mechanism

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