Coke and Chemistry

, Volume 60, Issue 11, pp 439–444 | Cite as

Effect of Ionic Liquid 1-Butyl-3-Methyl-Imidazolium Dihydrogen Phosphate Pretreatment on Pyrolysis of Lignin

  • Wenhao Yu
  • Zhiping Lei
  • Hengfu Shui
  • Shibiao Ren
  • Zhicai Wang
  • Shigang Kang
  • Chunxiu Pan
Chemistry
  • 2 Downloads

Abstract

In order to improve the yield of liquid fraction and phenolics content during lignin pyrolysis, an effective method of lignin pyrolysis through the pretreatment of lignin by an acidic ionic liquid 1-butyl-3- methyl-imidazolium dihydrogen phosphate ([Bmim]H2PO4) at low temperature is investigated in this study. It is found that [Bmim]H2PO4 pretreatment increases the total yield of liquid products of lignin pyrolysis compared to that of original lignin. The [Bmim]H2PO4 pretreatment temperature significantly impacts the behaviors of the lignin pyrolysis. In the temperature range of 50 to 150°C, the yield of the overall liquid product obtained by pyrolysis of the sample pretreated at 50°C is the highest. After pretreatment, the [Bmim]H2PO4 can be efficiently recovered, but the structure and stability of the [Bmim]H2PO4 have been changed. The FTIR analysis shows that the ionic liquid [Bmim]H2PO4 pretreatment can break hydrogen bonds, ether linkages and ester bonds in lignin.

Keywords

ionic liquids lignin pretreatment pyrolysis liquid products 

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Copyright information

© Allerton Press, Inc. 2017

Authors and Affiliations

  • Wenhao Yu
    • 1
  • Zhiping Lei
    • 1
    • 2
  • Hengfu Shui
    • 1
  • Shibiao Ren
    • 1
  • Zhicai Wang
    • 1
  • Shigang Kang
    • 1
  • Chunxiu Pan
    • 1
  1. 1.School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Coal Clean Conversion and UtilizationAnhui University of TechnologyMa’anshan, Anhui ProvinceP.R. China
  2. 2.Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and TechnologyTaiyuan University of TechnologyTaiyuanChina

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