文献类型：期刊文献

英文题名：Characterization of depolymerized lignin and renewable phenolic compounds from liquefied waste biomass

作者：Feng, Junfeng[1] Jiang, Jianchun[1,2] Yang, Zhongzhi[1] Su, Qiuli[1] Wang, Kui[1,3] Xu, Junming[3]

第一作者：Feng, Junfeng

通信作者：Jiang, JC[1];Jiang, JC[2];Xu, JM[3]

机构：[1]Chinese Acad Forestry, Natl Engn Lab Biomass Chem Utilizat, Inst Chem Ind Forest Prod, Key Lab Forest Chem Engn, Nanjing 210042, Jiangsu, Peoples R China;[2]Jiangsu Qianglin Biomass Energy Co Ltd, Liyang 213364, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry New Technol, 1 Xiangshan Village, Beijing 100091, Peoples R China

年份：2016

卷号：6

期号：98

起止页码：95698-95707

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20164302931187);Scopus(收录号：2-s2.0-84991677373);WOS:【SCI-EXPANDED(收录号:WOS:000385633100039)】；

基金：The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (31530010 and 31422013). The authors also thank the Research Grant of Jiangsu Province Biomass Energy and Material Key Laboratory (JSBEM-S-201502) for this investigation.

语种：英文

外文关键词：Aromatization - Biomass - Fourier transform infrared spectroscopy - Gel permeation chromatography - Lignin - Molecular weight - Nuclear magnetic resonance spectroscopy - Thermogravimetric analysis

摘要：This investigation aimed to analyze the renewable phenolic compounds that separate from liquefied mason pine. One-step thermal conversion of biomass to phenolic products from waste mason pine using an acidic catalyst and methanol was accomplished under mild conditions. Three fractions (fractions 1#, 2#, and 3#) of phenolic compounds with high added-value were extracted with water-organic solvent from liquefied oil via a stepwise fractionation process. The structural features of three phenolic compounds and depolymerized lignin were analyzed and identified by a combination of heteronuclear single quantum correlation-nuclear magnetic resonance, gel permeation chromatography, Fourier transform infrared spectroscopy, and thermogravimetric analysis, showing interesting functionalities for biochemical and biofuel applications. In this investigation, guaiacyl (G) and p-hydroxybenzoate (PB) aromatics were the basic units of three phenolic compound fractions. Etherified syringyl aromatics were evident in fractions 1# and 3#. There were only single-aromatic-ring units (such as G and PB units) in phenolic compound fraction 2#. In the aromatic region, the absence of beta-O-4' ether linkage, resinol, and phenylcoumaran units in three phenolic compound fractions indicated that depolymerization of lignin occurred during the liquefied biomass process. The molecular weights of three phenolic compound fractions were significantly different (797, 249, and 497, respectively) along with fractions 1#, 2#, and 3#. The phenolic compounds could be separated into a high, lower, and lowest molecular weight fraction in this study. As evidenced by GC-MS spectra, the three phenolic compound fraction products and depolymerized lignin were mainly comprised of phenolic derivatives, such as 3-methyl-4-ethylphenol, 4-ethyl-2methoxyphenol, and 3-methylcatechol. Percentages of the total phenols and derivatives in the three phenolic compound fractions and depolymerized lignin were 77.59%, 81.76%, 80.19%, and 78.86%, respectively. Therefore, the three phenolic compound fractions were clearly quantified and valuable, and can be used as chemical products.