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

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	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 3; Sun C(孙岑)1,2; Zhang YC 3
刊名	INTERNATIONAL JOURNAL OF ENERGY RESEARCH
	2020-09-17
页码	17
关键词	ash char mineral transformation physicochemical property pressurized combustion pressurized pyrolysis
ISSN号	0363-907X
DOI	10.1002/er.5739
通讯作者	Sun, Cen(suncen@imech.ac.cn)
英文摘要	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.
分类号	一类
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
WOS关键词	OXY-FUEL COMBUSTION ; PULVERIZED COAL ; TEMPERATURE ; IMPACT
WOS研究方向	Energy & Fuels ; Nuclear Science & Technology
语种	英语
WOS记录号	WOS:000569734500001
资助机构	National Key R&D Program of China ; Fundamental Research Funds for the Central Univers
其他责任者	Sun, Cen
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85240]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing, Peoples R China; 3.North China Elect Power Univ, Sch Energy & Power Engn, Baoding, 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.