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Acquiring real kinetics of reactions in the inhibitory atmosphere containing product gases using micro fluidized bed
AIChE Journal ( IF 3.7 ) Pub Date : 2021-05-17 , DOI: 10.1002/aic.17325
Xuejing Liu 1 , Wenqian Hao 1 , Kexin Wang 1 , Yingche Wang 1 , Ping An 1 , Hong Zhang 1 , Junrong Yue 2 , Dingrong Bai 1 , Guangwen Xu 1, 2
Affiliation  

This study proposed an isotope-tagging method to investigate reactions under the atmosphere of product gas. To illustrate this method, the calcination kinetics of calcium carbonate Ca13CO3 in CO2 atmospheres were investigated by monitoring 13CO2 produced using a micro fluidized bed reaction analyzer (MFBRA). The results demonstrated that the presence of CO2 in reaction atmosphere increases the apparent activation energy. The increase in the apparent activation energy is, however, significantly overestimated by the thermogravimetric analyzer (TGA) because of the excessive suppression by stagnated product gas inside the sample crucible. Comparatively, the apparent activation energy increases with CO2 from the MFBRA due primarily to the thermal equilibrium limitation, because the gas diffusion in the MFBRA is essentially eliminated. It is thus concluded that the MFBRA is quite capable of acquiring the real kinetics of reactions in such inhibitory atmospheres.

中文翻译:

使用微流化床获得含有产物气体的抑制性气氛中的真实反应动力学

本研究提出了一种同位素标记方法来研究产品气体气氛下的反应。为了说明这种方法,通过使用微流化床反应分析仪 (MFBRA)监测产生的13 CO 2来研究碳酸钙 Ca 13 CO 3在 CO 2气氛中的煅烧动力学。结果表明,CO 2的存在在反应气氛中增加表观活化能。然而,热重分析仪 (TGA) 显着高估了表观活化能的增加,因为样品坩埚内的停滞产物气体过度抑制。相比之下,表观活化能随着来自 MFBRA 的CO 2增加,主要是由于热平衡限制,因为 MFBRA 中的气体扩散基本上被消除。因此得出的结论是,MFBRA 非常有能力获得在这种抑制气氛中的真实反应动力学。
更新日期:2021-05-17
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