Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor
文献类型：会议论文
| 作者 | Yu, Jian; Zeng, Xi; Zhang, Juwei; Zhong, Mei; Zhang, Guangyi; Wang, Yin; Xu, Guangwen |
| 出版日期 | 2013 |
| 关键词 | Supersaturation - Activation energy - Association reactions - Chemical reactors - Fluid catalytic cracking - Kinetics - Diffusion in liquids - Graphite - Isotherms - Fluidized bed furnaces - Functions - Rate constants |
| 卷号 | 103 |
| DOI | 10.1016/j.fuel.2011.09.060 |
| 页码 | 29-36 |
| 英文摘要 | The isothermal differential characteristics of the gas-solid reaction occurring in a micro-fluidized bed reactor were studied using the indigenously developed Micro-Fluidized Bed Reaction Analyzer (MFBRA). The combustion of graphite powder in micrometers was taken as the model reaction because of its negligible internal diffusion and chemical-reaction simplicity. With minimized inhibitions from both the internal and external diffusions, the reaction in MFBRA at a preset temperature was analyzed by using the isothermal kinetic approach, resulting in an activation energy of 165 kJ/mol and a pre-exponential factor of 106 1/s. The reaction was further found to be subject to the nucleation and growth model expressed by G(伪) = -ln(1 - 伪). Measuring this reaction in TG via the programmed heating method resulted in the similar activation energy and the same reaction function model (by extrapolating to zero conversion). Comparing with the non-isothermal approach for TG that involves complicated mathematical calculations, the isothermal differential approach for MFBRA allowed the separation of the temperature effect (i.e., the reaction rate constant) and kinetic function model, thus providing a simple and reliable determination of the gas-solid reaction kinetics. 漏 2012 Elsevier Ltd. All rights reserved. |
| 项目编号 | The authors are grateful to the financial supports of Chinese Academy of Sciences (GJHZ200824, 0829011198), National High-Tech Research and Development Program (2009AA02Z209, 2010AA065004), National Key Technology Support Program (2009BAC64B00), National Basic Research Program of China (2011CB201304) and National Natural Science Foundation of China (21006110, 21006114, 21106156, 21076217). Acknowledgements would be also extended to Ms. Jianhong Zhu for her work in experiments. |
| 资助机构 | Elsevier Ltd |
| 学科主题 | Fluidized Beds |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59347]  |
| 作者单位 | State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, China |
| 推荐引用方式 GB/T 7714 | Yu, Jian,Zeng, Xi,Zhang, Juwei,et al. Isothermal differential characteristics of gas-solid reaction in micro-fluidized bed reactor[C]. 见:. |
入库方式： OAI收割
来源：过程工程研究所
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