Characterization of char gasification in a micro fluidized bed reaction analyzer
文献类型：会议论文
| 作者 | Zeng, Xi3; Wang, Fang2,3; Wang, Yonggang2; Li, Aoming1; Yu, Jian3; Xu, Guangwen3 |
| 出版日期 | 2014-03-20 |
| 关键词 | Reaction rates - Association reactions - Carbon dioxide - Diffusion in liquids - Gasification - Activation energy |
| 卷号 | 28 |
| 期号 | 3 |
| DOI | 10.1021/ef402387r |
| 页码 | 1838-1845 |
| 英文摘要 | This study is devoted to characterizing the isothermal reaction kinetics of char gasification with CO2 in a micro fluidized bed reaction analyzer (MFBRA) in comparison to the measurement in a thermogravimetric analyzer (TGA). Under minimized inhibition of heat and mass transfer, the reaction rate was found to be much higher in the MFBRA than in the TGA. The maximal rate appeared at a conversion of about 0.15 in the MFBRA but at 0.45 in the TGA. The shrinking core model described well the char-CO2 gasification reaction in both the MFBRA and TGA. In the temperature range of 760-1000 C, the char-CO2 gasification reaction can be divided into two stages. At lower temperatures, the activation energy from the MFBRA and TGA is very close, validating the reliability of the MFBRA for analyzing gas-solid reaction kinetics. At higher temperatures, the estimated activation energy was obviously higher for the MFBRA than for the TGA, showing the lower diffusion limitation prevailing in the MFBRA. The frequency factor for the Arrhenius equation was found to be much higher for the MFBRA than for the TGA, complying with the higher reaction rate observed in the MFBRA. The variation in the reaction atmosphere composition during gas switching in the TGA was also investigated. 漏 2014 American Chemical Society. |
| 资助机构 | American Chemical Society |
| 学科主题 | Fluidized Beds |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59412]  |
| 作者单位 | 1.Shanghai Amtek Industrial Equipment Limited Company, Shanghai 200131, China 2.School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China 3.State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China |
| 推荐引用方式 GB/T 7714 | Zeng, Xi,Wang, Fang,Wang, Yonggang,et al. Characterization of char gasification in a micro fluidized bed reaction analyzer[C]. 见:. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。