Chem. J. Chinese Universities ›› 2015, Vol. 36 ›› Issue (8): 1461.doi: 10.7503/cjcu20150253

• Articles: Inorganic Chemistry • Previous Articles     Next Articles

Consecutive Synthesis of Xylose, Porous Carbon and Silica by High-efficient Utilization of Rice Husk

LI Ying1, SHI Gang2,*(), ZHANG Liang1, LI Youran1, SHI Guiyang1, NI Caihua2   

  1. 1. National Engineering Laboratory for Cereal Fermentation Technology, 2. School of Chemical and Material Egineering, Jiangnan University, Wuxi 214122, China
  • Received:2015-03-31 Online:2015-08-10 Published:2015-07-17
  • Contact: SHI Gang E-mail:gangshi@jiangnan.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.201401079) and the Jiangsu Provincial Science Foundation for Youths, China(No.BK20140158)

Abstract:

Batch hydrolysis of hemicellulose in rice husk was conducted under various operating conditions, and orthogonal test design was adopted to achieve the highest xylose yield. The optimum hydrolysis temperature, sulfuric acid concentration(mass fraction), and hydrolysis time were determined to be 130 ℃, 2% and 6 h, respectively. Hydrolysis rate of 96.81% was attained under the optimum conditions(the content of hemicellulose in rice husk was used as benchmark). Xylose yield of 62.8% was reached after the impurities were removed from the xylose solution. Porous carbon with well-developed uniform pore structure was prepared by the residue of hydrolyzed rice husk. It had high adsorption capability for pigment in xylose solution, but low adsorption capability of xylose, making it a good adsorbent to purify xylose. Silica of high purity was also obtained during the preparation of porous carbon.

Key words: Rice husk, Xylose, Porous carbon, Silica, Adsorption

CLC Number: 

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