华南理工大学学报(自然科学版) ›› 2016, Vol. 44 ›› Issue (11): 7-11,25.doi: 10.3969/j.issn.1000-565X.2016.11.002

• 化学化工 • 上一篇    下一篇

木质素液化产物中生物油的盐析萃取分离工艺

欧阳新平 陈静 邱学青   

  1. 华南理工大学 化学与化工学院,广东 广州 510640
  • 收稿日期:2016-03-14 修回日期:2016-05-26 出版日期:2016-11-25 发布日期:2016-10-04
  • 通信作者: 欧阳新平( 1966-) ,男,教授,博士生导师,主要从事生物质资源和能源研究. E-mail:ceouyang@scut.edu.cn
  • 作者简介:欧阳新平( 1966-) ,男,教授,博士生导师,主要从事生物质资源和能源研究.
  • 基金资助:

    国家重点基础研究发展计划项目( 2012CB215302) ; 国家自然科学基金资助项目( 21576104)

A Salting-Out Extraction Technology of Bio-Oil in Liquefaction Products of Lignin

OUYANG Xin-ping CHEN Jing QIU Xue-qing   

  1. School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-03-14 Revised:2016-05-26 Online:2016-11-25 Published:2016-10-04
  • Contact: 欧阳新平( 1966-) ,男,教授,博士生导师,主要从事生物质资源和能源研究. E-mail:ceouyang@scut.edu.cn
  • About author:欧阳新平( 1966-) ,男,教授,博士生导师,主要从事生物质资源和能源研究.
  • Supported by:

    Supported by the National Program on Key Basic Research Project of China( 2012CB215302) and the National Natural Science Foundation of China( 21576104)

摘要: 木质素的解聚和解聚所得生物油的分离是木质纤维素生物质液体燃料技术的瓶颈. 文中研究了木质素液化解聚产物中生物油的盐析萃取分离工艺,探讨了无机盐种类和加入量、平衡时间、温度对生物油盐析萃取效率的影响. 结果表明: 以饱和MnSO4作为盐析剂有利于生物油的萃取; 在80℃、平衡时间为10min 的条件下,生物油收率达52. 47%,含盐量为2. 76%. 盐析萃取工艺避免了有机溶剂的大量使用,可节约有机溶剂回收所需的成本,同时减少了有机溶剂挥发对环境的污染和潜在的危险,从而实现了生物油分离工艺的绿色化.

关键词: 木质素, 液化, 盐析, 萃取, 生物油

Abstract:

The bottleneck in preparing lignocellulosic biomass liquid fuel is how to depolymerize lignin and separate the bio-oil obtained through the depolymerization.In this paper,a new technology of salting-out extraction for separating bio-oil from the liquefaction products of lignin is investigated,and the effects of the kind and dosage of inorganic salt,the equilibrium time and the temperature on the yield of bio-oil from the liquefaction products of lignin are revealed.The results show that the extraction of bio-oil is facilitated by taking saturated MnSO4 solution as the salting-out agent,and that,under the conditions of 10 min of equilibrium time and 80℃ of extraction temperature,the bio-oil yield is up to 52.47% with a salt content of 2.76%.This new technology avoids the use of organic solvents,and thus saves the cost for the recovery of organic solvents.Meanwhile,it helps eliminate the environmental pollution and the corresponding potential risk,which results from the volatilization of organic solvents.Therefore,this new technology provides a green approach for separating bio-oil from the liquefaction products of lignin.

Key words: lignin, liquefaction, salting-out, extraction, bio-oil