Comprehensive study on the influence of preparation conditions on the physicochemical structure of char and the adaptability of the char reactivity model
文献类型：期刊论文
| 作者 | Song Qianshi2; Wang Xiaohan2 ; Li Haowen1,2; Yang Zixin1,2; Ye Yue2; Huo Jiepeng2
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 431页码:14 |
| ISSN号 | 1385-8947 |
| 关键词 | Coal Char gasification Physicochemical structure Pyrolysis condition Char reactivity model |
| DOI | 10.1016/j.cej.2021.133903 |
| 通讯作者 | Wang Xiaohan(wangxh@ms.giec.ac.cn) |
| 英文摘要 | 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. |
| WOS关键词 | CO2 GASIFICATION REACTIVITY ; ALKALINE-EARTH METALS ; WOODY BIOMASS CHARS ; DER-WAALS RADII ; STEAM GASIFICATION ; COAL CHAR ; BITUMINOUS COAL ; PYROLYSIS ; COMBUSTION ; DIFFUSION |
| 资助项目 | National Key R&D Program of China[2018YFC1901201] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000729449900003 |
| 资助机构 | National Key R&D Program of China |
| 源URL | [http://ir.giec.ac.cn/handle/344007/35473]  |
| 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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.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 |
| 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. |
入库方式： OAI收割
来源：广州能源研究所
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