Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (11): 56-62.doi: 10.3969/j.issn.1000-565X.2016.11.009

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Investigation into Depolymerization Characteristics of Alkali Lignin by Formate Cooperated with Pd /C

ZHAO Yuan-yuan WU Shu-bin LI You-ming   

  1. State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-06-21 Revised:2016-07-29 Online:2016-11-25 Published:2016-10-04
  • Contact: 赵媛媛( 1983-) ，女，博士，主要从事植物纤维类生物质的清洁能源与平台化学品转化研究． E-mail:scutzyy@163.com
  • About author:赵媛媛( 1983-) ，女，博士，主要从事植物纤维类生物质的清洁能源与平台化学品转化研究．
  • Supported by:

    Supported by the National Natural Science Foundation of China( 31270635)

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Abstract:

In order to explore the depolymerization characteristics of alkali lignin in the hydrothermal system with formate and Pd /C,seven kinds of formates were selected to conduct experiments.The results show that optimal conditions are a nickel formate and Pd /C amount ( with respect to raw material) of 10%,a reaction time of 30min and a reaction temperature of 325℃,and under such conditions,the liquid product yield in depolymerization products is 56.24% and the overall yield of four monophenols is 12.14%,By comparing high resolution mass spectra,organic elements and thermogravimetric characteristics of the control sample with those of the sample with nickel formate and Pd /C,it is found that the addition of nickel formate and Pd /C is helpful in the deoxygenation process of hydrothermal reaction of lignin,and causes more products of smaller relative molecular mass to produce.

Key words: alkali lignin, depolymerization characteristic, formate, mass spectrometry, elemental analysis, thermogravimetric analysis