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Catalytic effects of NaOH and Na2CO3 additives on alkali lignin pyrolysis and gasification
Guo, Da-liang1; Wu, Shu-bin1; Liu, Bei1; Yin, Xiu-li2; Yang, Qing2
2012-07-01
Source PublicationAPPLIED ENERGY
Volume95Pages:22-30
AbstractThe interest in utilization of alkali lignin in black liquor by pyrolysis and gasification is increasing due to the wish to produce bio-fuel and bio-chemical. Besides alkali lignin, the sodium salts are also the basic component of black liquor; they exist in two main forms: as phenolic sodium (-CONa) and carboxylate sodium (-COONa) groups forming a part of alkali lignin or as dissolved salts (NaOH and Na2CO3). In this paper, the influences of these dissolved salts on the pyrolysis and gasification characteristics of alkali lignin were discussed. Five lignin samples, including pure acid precipitated lignin, 10% and 60% NaOH-loaded lignin, 10% and 60% Na2CO3-loaded lignin, and black liquor solids were selected as the testing samples. Following experimental research on the evolution patterns of volatile products were carried Out on a thermogravimetric analyzer coupled with Fourier transform infrared spectrometry. The experimental data indicated that the pyrolysis and gasification reaction of alkali lignin could be catalyzed by NaOH and Na2CO3. In the pyrolysis stage, the maximum mass loss rate decreased with increasing amount of NaOH and Na2CO3 additives, while in the gasification stage it increased. In the gasification stage, the temperature of the maximum mass loss rate shifted to lower value with increasing amount of NaOH and Na2CO3 additives, but did not significantly change in the pyrolysis stage. FTIR analysis showed that the influences of NaOH and Na2CO3 additives on the pyrolysis and gasification products mainly varied in amounts but not in species. FTIR results also suggested that the release time of the volatile was affected by increasing NaOH and Na2CO3 additives amount. Moreover, NaOH and Na2CO3 markedly improved the evolution of CO in the gasification stage. (C) 2012 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordLignin Black Liquor Pyrolysis And Gasification Naoh And Na2co3 Tg-ftir
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apenergy.2012.01.042
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordTG-FTIR ANALYSIS ; BLACK LIQUOR GASIFICATION ; ENZYMATIC/MILD ACIDOLYSIS LIGNIN ; VICTORIAN BROWN-COAL ; WHEAT-STRAW ; KINETICS ; NITROGEN ; BIOMASS ; PULP ; VOLATILIZATION
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000303365900003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10577
Collection中国科学院广州能源研究所
Affiliation1.S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Renewable Energy & Gas Hydrate Key Lab CAS, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Guo, Da-liang,Wu, Shu-bin,Liu, Bei,et al. Catalytic effects of NaOH and Na2CO3 additives on alkali lignin pyrolysis and gasification[J]. APPLIED ENERGY,2012,95:22-30.
APA Guo, Da-liang,Wu, Shu-bin,Liu, Bei,Yin, Xiu-li,&Yang, Qing.(2012).Catalytic effects of NaOH and Na2CO3 additives on alkali lignin pyrolysis and gasification.APPLIED ENERGY,95,22-30.
MLA Guo, Da-liang,et al."Catalytic effects of NaOH and Na2CO3 additives on alkali lignin pyrolysis and gasification".APPLIED ENERGY 95(2012):22-30.
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