Knowledge Management System Of Institute of process engineering,CAS
| Characterization of Char Gasification in a Micro Fluidized Bed Reaction Analyzer | |
| Alternative Title | Energy Fuels |
| Zeng, Xi1; Wang, Fang1,2; Wang, Yonggang2; Li, Aoming3; Yu, Jian1; Xu, Guangwen1 | |
| 2014-03-01 | |
| Source Publication | ENERGY & FUELS
 |
| ISSN | 0887-0624 |
| Volume | 28Issue:3Pages:1838-1845 |
| Abstract | 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 degrees 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.; 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 degrees 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. |
| Keyword | Gas-solid Reaction Co2 Gasification Biomass Char Thermogravimetric Analysis Pyrolysis Conditions Reaction-kinetics Carbon-dioxide Coal Chars Steam Temperatures |
| Subtype | Article |
| WOS Headings | Science & Technology ; Technology |
| DOI | 10.1021/ef402387r |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | GAS-SOLID REACTION ; CO2 GASIFICATION ; BIOMASS CHAR ; THERMOGRAVIMETRIC ANALYSIS ; PYROLYSIS CONDITIONS ; REACTION-KINETICS ; CARBON-DIOXIDE ; COAL CHARS ; STEAM ; TEMPERATURES |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| WOS ID | WOS:000333381200027 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/8045 |
| Collection | 研究所（批量导入） |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China 3.Shanghai Amtek Ind Equipment Ltd Co, Shanghai 200131, Peoples R China |
| Recommended Citation GB/T 7714 | Zeng, Xi,Wang, Fang,Wang, Yonggang,et al. Characterization of Char Gasification in a Micro Fluidized Bed Reaction Analyzer[J]. ENERGY & FUELS,2014,28(3):1838-1845. |
| APA | Zeng, Xi,Wang, Fang,Wang, Yonggang,Li, Aoming,Yu, Jian,&Xu, Guangwen.(2014).Characterization of Char Gasification in a Micro Fluidized Bed Reaction Analyzer.ENERGY & FUELS,28(3),1838-1845. |
| MLA | Zeng, Xi,et al."Characterization of Char Gasification in a Micro Fluidized Bed Reaction Analyzer".ENERGY & FUELS 28.3(2014):1838-1845. |
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