Characteristics of lignite char derived from oxy-pyrolysis

doi:10.1016/j.fuel.2021.120261

	Characteristics of lignite char derived from oxy-pyrolysis
	Qi, Jianan 1,2,4; Fan, Cuigang 2,4; Li, Songgeng 2,3,4
刊名	FUEL
	2021-05-01
卷号	291 页码:9
关键词	Oxy-pyrolysis Lignite char Structure evolution Reactivity
ISSN号	0016-2361
DOI	10.1016/j.fuel.2021.120261
英文摘要	Lignite 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.
资助项目	"Strategic Priority Research Program" of the Chinese Academy of Sciences[XDA21040400] ; National Natural Science Foundation of China[21978305]
WOS关键词	LOW-TEMPERATURE PYROLYSIS ; COAL CHAR ; CATALYTIC CRACKING ; REACTION-MECHANISM ; HEAT-TREATMENT ; EVOLUTION ; SULFUR ; GASIFICATION ; OXIDATION ; NITROGEN
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000651782800007
资助机构	"Strategic Priority Research Program" of the Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/48708]
专题	中国科学院过程工程研究所
通讯作者	Li, Songgeng
作者单位	1.Sino Danish Ctr Educ & Res, 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.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式 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.