AlCl3 catalyzed conversion of hemicellulose in corn stover

作者：Yi Jian; He Ting; Jiang Zhicheng; Li Jianmei; Hu Changwei^*

来源：Chinese Journal of Catalysis, 2013, 34(11): 2146-2152.

DOI：10.1016/S1872-2067(12)60718-9

• Corn stover
• Hemicellulose
• Selective conversion
• Aluminium trichloride
• Furfural

The selective conversion of the hemicellulose in corn stover (stalk) by AlCl3 as catalyst under hydrothermal conditions at low temperature was investigated. The effect of reaction temperature, reaction time, and AlCl3 amount was investigated. The biomass samples before and after reaction were characterized by chemical titration, X-ray diffraction, and scanning electron microscopy. The conversion of the hemicellulose in the corn stover at 140 degrees C for 1 h reached 85.1%, while keeping a high proportion of the cellulose and lignin components unreacted with the conversions of 10.7% and 23.9%, respectively. Xylose and a small amount of acetic acid, and furfural were obtained from the filtrate from the hemicellulose conversion. Further reaction of the filtrate significantly improved the conversion of xylose. This was performed in a H2O-tetrahydrofuran solvent system, and large amounts of levulinic acid, formic acid, and furfural were obtained. The gamma-Al2O3/SO42- solid acid catalyst selectively promoted the formation of furfural in the H2O-tetrahydrofuran solvent system.

• 出版日期2013-11
• 单位四川大学