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Pyrolysis of black liquor for phenols and impact of its inherent alkali
Alternative TitleFuel Process. Technol.
Peng, Cuina1,2; Zhang, Guangyi1; Yue, Junrong1; Xu, Guangwen1
2014-11-01
Source PublicationFUEL PROCESSING TECHNOLOGY
ISSN0378-3820
Volume127Issue:NOV,Pages:149-156
AbstractThis study is devoted to investigating the potential of producing phenols via pyrolysis of lignin in black liquor (BL) by a fixed bed reactor at 350-550 degrees C. The chemicals in the pyrolysis liquid of both black liquor solid (BLS) and purified lignin (PL) from BL are mainly phenols including 4-methoxyphenol, 3,4-dimethoxyphenol, 2-methoxy-4-alkylphenols and alkylphenols. For pyrolysis of BLS, high temperature facilitated the breakage of methoxyl group(s). The highest liquid yield was 27 wt.% at 450 degrees C, and the content of phenols free of -OCH3 reached 55 wt.% in addition to a small amount of other phenols. The pyrolysis of PL with and without addition of alkali additives of NaOH and Na2CO3 at 450 degrees C verified that the alkali could promote the formation of phenols. The strong alkali of NaOH greatly promoted the production of phenols free of -OCH3, whereas the effect of Na2CO3 in this aspect was much less. Catalyzed by its self-contained alkalis, the pyrolysis of BLS had high contents of alkylphenols and phenol in the tar (organics). This shows the prospective for production of phenols from pyrolyzing black liquor, while the heating value of the pyrolysis residue was above 6300 kJ/kg to further support the cascade utilization of BLS. (C) 2014 Elsevier B.V. All rights reserved.; This study is devoted to investigating the potential of producing phenols via pyrolysis of lignin in black liquor (BL) by a fixed bed reactor at 350-550 degrees C. The chemicals in the pyrolysis liquid of both black liquor solid (BLS) and purified lignin (PL) from BL are mainly phenols including 4-methoxyphenol, 3,4-dimethoxyphenol, 2-methoxy-4-alkylphenols and alkylphenols. For pyrolysis of BLS, high temperature facilitated the breakage of methoxyl group(s). The highest liquid yield was 27 wt.% at 450 degrees C, and the content of phenols free of -OCH3 reached 55 wt.% in addition to a small amount of other phenols. The pyrolysis of PL with and without addition of alkali additives of NaOH and Na2CO3 at 450 degrees C verified that the alkali could promote the formation of phenols. The strong alkali of NaOH greatly promoted the production of phenols free of -OCH3, whereas the effect of Na2CO3 in this aspect was much less. Catalyzed by its self-contained alkalis, the pyrolysis of BLS had high contents of alkylphenols and phenol in the tar (organics). This shows the prospective for production of phenols from pyrolyzing black liquor, while the heating value of the pyrolysis residue was above 6300 kJ/kg to further support the cascade utilization of BLS. (C) 2014 Elsevier B.V. All rights reserved.
KeywordCatalytic Pyrolysis Phenols Cascade Utilization Biochemical Alkaline Catalyst Black Liquor
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.fuproc.2014.06.020
URL查看原文
Indexed BySCI
Language英语
WOS KeywordTHERMAL-DEGRADATION ; CATALYTIC PYROLYSIS ; SUPERCRITICAL WATER ; BIOMASS PYROLYSIS ; LIGNIN PYROLYSIS ; GASIFICATION ; STRAW ; PRODUCTS ; RESIDUE ; PULP
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000340976500021
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11503
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 black liquor for phenols and impact of its inherent alkali[J]. FUEL PROCESSING TECHNOLOGY,2014,127(NOV,):149-156.
APA Peng, Cuina,Zhang, Guangyi,Yue, Junrong,&Xu, Guangwen.(2014).Pyrolysis of black liquor for phenols and impact of its inherent alkali.FUEL PROCESSING TECHNOLOGY,127(NOV,),149-156.
MLA Peng, Cuina,et al."Pyrolysis of black liquor for phenols and impact of its inherent alkali".FUEL PROCESSING TECHNOLOGY 127.NOV,(2014):149-156.
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