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Effects of Extraction Methods on Structure and Valorization of Corn Stover Lignin by a Pd/C Catalyst
Peng, Chang1,2; Chen, Qin3; Guo, Haiwei1,2; Hu, Gang3; Li, Changzhi1; Wen, Jialong4; Wang, Haisong5; Zhang, Tao1; Zhao, Zongbao Kent1; Sun, Runcang4; Xie, Haibo3
KeywordBio-oils Ionic Liquids Lignin Fractionation Structural Elucidation Valorization
Source PublicationCHEMCATCHEM
2017-03-20
ISSN1867-3880
DOI10.1002/cctc.201601501
Volume9Issue:6Pages:1135-1143
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordNUCLEAR-MAGNETIC-RESONANCE ; IONIC LIQUID PRETREATMENT ; ORGANOSOLV PROCESS ; STEAM EXPLOSION ; CHEMICAL-STRUCTURE ; EUCALYPTUS LIGNIN ; FINE CHEMICALS ; CARBON-FIBERS ; 2D NMR ; ETHANOL
AbstractWith the significant development of efficient pretreatments of lignocellulosic biomass towards using carbohydrate compositions for biofuel production, the valorization of associated lignin products into valuable chemicals has gained much attention. Four lignins obtained by pretreatment of corn stover with emerging ionic liquid-based mixed organic electrolytes (ILOE) and alkaline twin-screw extrusion (ATSE) pretreatment technologies were characterized by gel permeation chromatography (GPC), FTIR, HSQC, P-31 NMR spectroscopy, and SEM. These lignins were valorized by using Pd/C under various conditions, followed by an elucidation of the relationship between the lignin structure and valorization efficiency and selectivity. The pretreatment/separation methods have a significant effect on lignin structure and subsequent valorization efficiency. HSQC spectra revealed that corn stover lignin consisted of beta-O-4, beta-5, beta-1 linkages, and cinnamyl alcohol end groups. The extracted lignins (EL) showed less carbohydrates and beta-O-4 units than those of enzymatic hydrolytic lignins (EHL). The yields of bio-oils were 61.7% and 57.9% for ATSE-EL and ILOE-EL, and 34.2% and 45.1% for ATSE-EHL and ILOE-EHL under optimal and comparative conditions, respectively. Part of the syringyl (S) units were converted into guaiacyl or p-hydroxyphenyl (H) units by release of methoxyl groups on the aromatic ring through hydrogenolysis, which led to a decreased proportion of S units and an increased proportion of H units in oil compared with in lignin.
Language英语
WOS IDWOS:000397879500035
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169469
Collection中国科学院大连化学物理研究所
Corresponding AuthorLi, Changzhi; Xie, Haibo
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Guizhou Univ, Dept Polymer Mat & Engn, Coll Mat & Met, Guiyang 550025, Peoples R China
4.Beijing Forest Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China
5.Dalian Polytech Univ, Dalian 116034, Peoples R China
Recommended Citation
GB/T 7714
Peng, Chang,Chen, Qin,Guo, Haiwei,et al. Effects of Extraction Methods on Structure and Valorization of Corn Stover Lignin by a Pd/C Catalyst[J]. CHEMCATCHEM,2017,9(6):1135-1143.
APA Peng, Chang.,Chen, Qin.,Guo, Haiwei.,Hu, Gang.,Li, Changzhi.,...&Xie, Haibo.(2017).Effects of Extraction Methods on Structure and Valorization of Corn Stover Lignin by a Pd/C Catalyst.CHEMCATCHEM,9(6),1135-1143.
MLA Peng, Chang,et al."Effects of Extraction Methods on Structure and Valorization of Corn Stover Lignin by a Pd/C Catalyst".CHEMCATCHEM 9.6(2017):1135-1143.
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