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A Comparison of Monomeric Phenols Produced from Lignin by Fast Pyrolysis and Hydrothermal Conversions
Du, Lin; Wang, Ze; Li, Songgeng; Song, Wenli; Lin, Weigang
2013
Source PublicationINTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
Volume11Issue:0Pages:0
AbstractLignin, a by-product in biorefining industries such as lignocellulose-to-ethanol and paper-making processes, is a promising renewable source for value-added phenolic chemicals. Hydrothermal conversion and fast pyrolysis are two main thermo-chemical approaches for depolymerization of lignin. Hydrothermal conversion is a low temperature (250-500 degrees C) and high pressure (5-30 MPa) process particularly suited for high moisture materials, whereas fast pyrolysis takes place at atmospheric pressure and moderate temperatures in the absence of oxygen and requires drying of the feedstock. In this paper, we present experimental results that provide a comparison of distributions of monomeric phenols produced by fast pyrolysis and hydrothermal conversion of lignin. Hydrothermal conversion experiments were performed in a 150 ml autoclave at 300 degrees C for 30 minutes with different alkaline concentrations. Pyrolysis was carried out in a spouted bed reactor at 500 degrees C. Hydrothermal conversion of lignin under 1 M alkaline solutions resulted in lower char yields (12.1%) compared to fast pyrolysis, which resulted in 54.5% solid yields. Monomer phenols obtained from hydrothermal conversion of lignin were found to have a narrower distribution dominated by catechol and its methyl derivative. In contrast, fast pyrolysis produced a wider distribution of monomeric phenols dominated by guaiacol and its derivatives with various chains substituted para to the hydroxyl group. Mechanisms of lignin fast pyrolysis and the methoxy group conversion under hydrothermal conditions were proposed respectively. In conclusion, hydrothermal technology is better suited for production of value added monomer phenols from lignin.
KeywordLignin Monomeric Phenols Fast Pyrolysis Hydrothermal Conversion
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS KeywordCATALYTIC PYROLYSIS ; SPECTROSCOPY ; BIOMASS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000321251000001
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13546
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Du, Lin,Wang, Ze,Li, Songgeng,et al. A Comparison of Monomeric Phenols Produced from Lignin by Fast Pyrolysis and Hydrothermal Conversions[J]. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING,2013,11(0):0.
APA Du, Lin,Wang, Ze,Li, Songgeng,Song, Wenli,&Lin, Weigang.(2013).A Comparison of Monomeric Phenols Produced from Lignin by Fast Pyrolysis and Hydrothermal Conversions.INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING,11(0),0.
MLA Du, Lin,et al."A Comparison of Monomeric Phenols Produced from Lignin by Fast Pyrolysis and Hydrothermal Conversions".INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 11.0(2013):0.
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