Comprehensive study on the influence of preparation conditions on the physicochemical structure of char and the adaptability of the char reactivity model

doi:10.1016/j.cej.2021.133903

GIEC OpenIR

	Comprehensive study on the influence of preparation conditions on the physicochemical structure of char and the adaptability of the char reactivity model
	Song Qianshi 1; Wang Xiaohan1 ; Li Haowen 1,2; Yang Zixin 1,2; Ye Yue1 ; Huo Jiepeng 1
	2022-03-01
发表期刊	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
卷号	431 页码:14
通讯作者	Wang Xiaohan(wangxh@ms.giec.ac.cn)
摘要	This study was performed to analyse the adaptability of the self-developed char reactivity model and reveal the influence of preparation conditions on the char gasification reactivity. Firstly, six coal samples were selected for the step-by-step extraction of the metal elements. The forms of K elements in the different coal samples were quite different. Na elements were mainly water-soluble, ion-exchanged and acid-soluble states, whilst Ca, Mg and Fe elements were mainly ion-exchanged, acid-soluble and insoluble states. Then, the coal char gasification rate was determined using thermogravimetric analysis (TGA) in the temperature range of 1073-1223 K to verify the self-developed char reactivity model. Results showed that the model could accurately predict the reaction rate of the char samples under different gasification temperatures. Finally, a typical coal sample was selected to prepare char under various heating rates, cooling rates and annealing times and characterised by CO2 and N-2 adsorption-desorption, Raman, FTIR, XPS and TGA. Results showed that with prolonged annealing time and decreased heating and cooling rates, the proportion of micro-pores in char increased, the particles tended to possess a graphitisation structure. In addition, the surface reaction functional groups disappeared, reducing the char gasification reaction rate. Comparison of the model calculated values and the experimental values of the char gasification reaction rate obtained under different preparation conditions showed that the self-developed model could provide a reference for the prediction of in situ char gasification reaction rate.
关键词	Coal Char gasification Physicochemical structure Pyrolysis condition Char reactivity model
DOI	10.1016/j.cej.2021.133903
关键词[WOS]	CO2 GASIFICATION REACTIVITY ; ALKALINE-EARTH METALS ; WOODY BIOMASS CHARS ; DER-WAALS RADII ; STEAM GASIFICATION ; COAL CHAR ; BITUMINOUS COAL ; PYROLYSIS ; COMBUSTION ; DIFFUSION
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2018YFC1901201]
WOS研究方向	Engineering
项目资助者	National Key R&D Program of China
WOS类目	Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:000729449900003
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/35474
专题	中国科学院广州能源研究所
通讯作者	Wang Xiaohan
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Song Qianshi,Wang Xiaohan,Li Haowen,et al. Comprehensive study on the influence of preparation conditions on the physicochemical structure of char and the adaptability of the char reactivity model[J]. CHEMICAL ENGINEERING JOURNAL,2022,431:14.
APA	Song Qianshi,Wang Xiaohan,Li Haowen,Yang Zixin,Ye Yue,&Huo Jiepeng.(2022).Comprehensive study on the influence of preparation conditions on the physicochemical structure of char and the adaptability of the char reactivity model.CHEMICAL ENGINEERING JOURNAL,431,14.
MLA	Song Qianshi,et al."Comprehensive study on the influence of preparation conditions on the physicochemical structure of char and the adaptability of the char reactivity model".CHEMICAL ENGINEERING JOURNAL 431(2022):14.