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Pyrolysis of lignin for phenols with alkaline additive
Alternative TitleFuel Process. Technol.
Peng, Cuina1,2; Zhang, Guangyi1; Yue, Junrong1; Xu, Guangwen1
2014-08-01
Source PublicationFUEL PROCESSING TECHNOLOGY
ISSN0378-3820
Volume124Issue:1Pages:212-221
AbstractThis study is devoted to investigating the effect of alkaline additives on lignin pyrolysis for producing phenols. The effects of different types and amounts of alkaline additives, i.e., 0-20 wt.% NaOH, KOH, Na2CO3 or K2CO3, on lignin pyrolysis were tested in a fixed bed reactor. The chemicals in the pyrolysis liquid from a commercial alkali lignin with and without alkaline additive were mainly phenols including 2-methoxy-phenol, 2,6-dimethoxy-phenol, alkyl-phenols (free of methoxyl group) and 2-methoxy-4-alkyl-phenols. More vanillin and dimethoxy-benzene appeared in the pyrolysis liquid of alkali lignin and lignin purified from black liquor, respectively. While carbonate additives facilitated the production of methxoy-phenols, more alkyl-phenols were formed with the hydroxide additives. Analysis showed that all the alkaline additives promoted the reactions of decarboxylation or decarbonylation and the removal of unsaturated alkyl branch chains. The strong alkalescence of NaOH and KOH facilitated more deoxygenation of methoxyl groups so that there were more phenols free of methoxyl groups. The pyrolysis of PL resulted in the liquid yields of up to 30 wt.% (dry base), and the content of phenols was above 80% in the liquid. (C) 2014 Elsevier B.V. All rights reserved.; This study is devoted to investigating the effect of alkaline additives on lignin pyrolysis for producing phenols. The effects of different types and amounts of alkaline additives, i.e., 0-20 wt.% NaOH, KOH, Na2CO3 or K2CO3, on lignin pyrolysis were tested in a fixed bed reactor. The chemicals in the pyrolysis liquid from a commercial alkali lignin with and without alkaline additive were mainly phenols including 2-methoxy-phenol, 2,6-dimethoxy-phenol, alkyl-phenols (free of methoxyl group) and 2-methoxy-4-alkyl-phenols. More vanillin and dimethoxy-benzene appeared in the pyrolysis liquid of alkali lignin and lignin purified from black liquor, respectively. While carbonate additives facilitated the production of methxoy-phenols, more alkyl-phenols were formed with the hydroxide additives. Analysis showed that all the alkaline additives promoted the reactions of decarboxylation or decarbonylation and the removal of unsaturated alkyl branch chains. The strong alkalescence of NaOH and KOH facilitated more deoxygenation of methoxyl groups so that there were more phenols free of methoxyl groups. The pyrolysis of PL resulted in the liquid yields of up to 30 wt.% (dry base), and the content of phenols was above 80% in the liquid. (C) 2014 Elsevier B.V. All rights reserved.
KeywordLignin Catalytic Pyrolysis Alkaline Additive Phenol Black Liquor Biomass
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.fuproc.2014.02.025
URL查看原文
Indexed BySCI
Language英语
WOS KeywordBLACK LIQUOR GASIFICATION ; CATALYTIC FAST PYROLYSIS ; BIO-OIL ; ACTIVATED CARBON ; PY-GC/MS ; BIOMASS ; FUELS ; HYDRODEOXYGENATION ; TEMPERATURE ; COMPONENTS
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000336879800025
Citation statistics
Cited Times:67[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10948
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Peng, Cuina,Zhang, Guangyi,Yue, Junrong,et al. Pyrolysis of lignin for phenols with alkaline additive[J]. FUEL PROCESSING TECHNOLOGY,2014,124(1):212-221.
APA Peng, Cuina,Zhang, Guangyi,Yue, Junrong,&Xu, Guangwen.(2014).Pyrolysis of lignin for phenols with alkaline additive.FUEL PROCESSING TECHNOLOGY,124(1),212-221.
MLA Peng, Cuina,et al."Pyrolysis of lignin for phenols with alkaline additive".FUEL PROCESSING TECHNOLOGY 124.1(2014):212-221.
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