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Characteristics of lignite char derived from oxy-pyrolysis
Qi, Jianan1,2,4; Fan, Cuigang1,2; Li, Songgeng1,2,3
2021-05-01
Source PublicationFUEL
ISSN0016-2361
Volume291Pages:9
AbstractLignite chars were prepared in a fixed bed reactor under various oxygen concentrations (0-15 vol%) and pyrolysis temperatures (873 K-1173 K). Characterization techniques such as Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and BET were applied to reveal the impacts of temperature and oxygen concentration on char structure evolution during pyrolysis. Combustion performances of the prepared chars were examined on a thermal gravimetric analyzer, using ignition and burnout temperatures as indexes of char reactivity. On a whole, oxy-pyrolysis char is more reactive than the char derived under inert (N2) atmosphere. Raman analysis indicates that the presence of oxygen during pyrolysis can reduce the extent of char graphitization at high temperatures and favors the removal of oxygen containing groups and aliphatic structures. Pore volume and specific surface area can be improved due to the presence of oxygen in pyrolysis. There is a critical oxygen concentration at high pyrolysis temperatures. Releasing behaviors of sulfur and nitrogen, and their speciation and distributions on the prepared chars were also discussed.
KeywordOxy-pyrolysis Lignite char Structure evolution Reactivity
DOI10.1016/j.fuel.2021.120261
Language英语
WOS KeywordLOW-TEMPERATURE PYROLYSIS ; COAL CHAR ; CATALYTIC CRACKING ; REACTION-MECHANISM ; HEAT-TREATMENT ; EVOLUTION ; SULFUR ; GASIFICATION ; OXIDATION ; NITROGEN
Funding Project"Strategic Priority Research Program" of the Chinese Academy of Sciences[XDA21040400] ; National Natural Science Foundation of China[21978305]
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding Organization"Strategic Priority Research Program" of the Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS IDWOS:000651782800007
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48709
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Songgeng
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
4.Sino Danish Ctr Educ & Res, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Qi, Jianan,Fan, Cuigang,Li, Songgeng. Characteristics of lignite char derived from oxy-pyrolysis[J]. FUEL,2021,291:9.
APA Qi, Jianan,Fan, Cuigang,&Li, Songgeng.(2021).Characteristics of lignite char derived from oxy-pyrolysis.FUEL,291,9.
MLA Qi, Jianan,et al."Characteristics of lignite char derived from oxy-pyrolysis".FUEL 291(2021):9.
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