Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion

doi:10.1002/er.5739

	Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion
	Lei M 1; Sun C(孙岑)2,3 ; Zhang YC 1
通讯作者	Sun, Cen(suncen@imech.ac.cn)
发表期刊	INTERNATIONAL JOURNAL OF ENERGY RESEARCH
	2020-09-17
页码	17
ISSN	0363-907X
摘要	Physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurized O-2/N(2)and O-2/CO(2)combustion were investigated by a pressurized tube furnace with Fourier transform infrared spectroscopy and X-ray diffraction analysis. The results indicated that as the pyrolysis pressure increased, the decompositions of the aromatic ring structure and the hydroxyl hydrogen bonds of char were enhanced and the aromatic ring transformed to the low-substituted single ring. Meanwhile, the aliphatic chain and carboxyl group in the char shortened at elevated pressures. Furthermore, pressurized pyrolysis increased the degree of graphitization of the char, which further influenced the microcrystalline parameters of char. During the pyrolysis process, the decompositions of some low-temperature minerals in the char were inhibited by the elevated pressure. In addition, the effect of the furnace temperature on the mineral transformations of char was more significant than the effect of the furnace pressure. Compared to what observed at atmospheric pressure, the primary minerals in the coal ash remained the same at elevated pressure, but their relative contents changed to some extent. And, the influence of the furnace pressure on the transformations of minerals in the ash was mainly affected by the combustion temperatures of different ignition mechanisms at different pressures. Compared to the O-2/N(2)mixture, the decompositions of low-temperature minerals and the formations of high-temperature minerals were restrained due to the relatively low combustion temperature in the O-2/CO(2)mixture. And, the furnace temperature instead of the furnace pressure was the primary factor which influenced the mineral transformations of ash.
关键词	ash char mineral transformation physicochemical property pressurized combustion pressurized pyrolysis
DOI	10.1002/er.5739
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000569734500001
关键词[WOS]	OXY-FUEL COMBUSTION ; PULVERIZED COAL ; TEMPERATURE ; IMPACT
WOS研究方向	Energy & Fuels ; Nuclear Science & Technology
WOS类目	Energy & Fuels ; Nuclear Science & Technology
资助项目	National Key R&D Program of China[2016YFB0600701] ; National Key R&D Program of China[2017MS120] ; Fundamental Research Funds for the Central Univers
项目资助者	National Key R&D Program of China ; Fundamental Research Funds for the Central Univers
论文分区	一类
力学所作者排名	1
RpAuthor	Sun, Cen
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85241
专题	高温气体动力学国家重点实验室
作者单位	1.North China Elect Power Univ, Sch Energy & Power Engn, Baoding, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lei M,Sun C,Zhang YC. Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion[J]. INTERNATIONAL JOURNAL OF ENERGY RESEARCH,2020:17.
APA	Lei M,孙岑,&Zhang YC.(2020).Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion.INTERNATIONAL JOURNAL OF ENERGY RESEARCH,17.
MLA	Lei M,et al."Investigation on the physicochemical properties of coal char during pressurized pyrolysis and the mineral transformations of coal ash during pressurizedO(2)/N(2)andO(2)/CO(2)combustion".INTERNATIONAL JOURNAL OF ENERGY RESEARCH (2020):17.

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