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Citation: KANG Peng, ZHENG Zongming, QIN Wu, YANG Yongping, DONG Changqing. Separation and Characterization of Lignin in Phosphoric Acid-acetone Pretreating Process[J]. Chinese Journal of Applied Chemistry, ;2014, 31(5): 570-576. doi: 10.3724/SP.J.1095.2014.30374 shu

Separation and Characterization of Lignin in Phosphoric Acid-acetone Pretreating Process

1.
National Engineering Laboratory for Biomass Power Generation Equipment, School of Renewable Energy Engineering, North China Electric Power University, Beijing 102206, China

Corresponding author: DONG Changqing,
Received Date: 24 July 2013
Available Online: 29 August 2013
Fund Project: 国家自然科学基金(51106051,51206044,51276062) (51106051,51206044,51276062)国家科技支撑计划(2012BAA09B01,2012BAD30B01) (2012BAA09B01,2012BAD30B01)北京市自然科学基金(3101001) (3101001)国家重点基础研究发展计划(2009CB219801) (2009CB219801)中央高校基本科研业务费专项资金(09ZG03,11ZG08,12MS15) (09ZG03,11ZG08,12MS15)教育部新世纪优秀人才计划(NCET-10-0374) (NCET-10-0374)高等学校学科创新引智计划资助(B12034) (B12034)教育部高等学校博士点新教师基金项目(2011003612001) (2011003612001)北京市哲学社会科学规划项目(11JGA010) (11JGA010)中国华能集团公司科学技术项目(HNKJ11-H25) (HNKJ11-H25)

In lignocellulosic ethanol production process,utilization of separated lignins can improve the economy of cellulosic ethanol technology.In this article using poplar power as feedstock,lignin extracted from three methods were analyzed and compared from the perspective of lignin yield and molecule modification degree.Phosphoric acid-acetone lignin is characterized by its high yield of 15%~25%.Alkaline cooking and organic solvent method can only reach 9.58% and 13.47%.By FT-IR characterization,it is confirmed that phosphoric acid-acetone lignin has the biggest absorption signal at 1608 cm^-1,1507 cm^-1 and 1463 cm^-1,and its conjugated carbonyl absorption peak also exists at 1650 cm^-1.This result indicate that it has the lowest modification.¹H NMR analysis also supports this conclusion.Phosphoric acid-acetone pretreatment can raise the economy of cellulosic ethanol process under lower temperature and normal pressure.
- cellulosic ethanol,
- lignin,
- phosphoric acid-acetone pretreatment,
- FT-IR,
- ¹H NMR
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