Kinetics study of heterogeneous continuous-flow nitration of trifluoromethoxybenzene†,Reaction Chemistry & Engineering

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Kinetics study of heterogeneous continuous-flow nitration of trifluoromethoxybenzene†
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2018-04-23 00:00:00 , DOI: 10.1039/c7re00182g
Zhenghui Wen _{1,

2,

3,

4,

5} , Mei Yang _{1,

2,

3,

4} , Shuainan Zhao _{1,

2,

3,

4,

5} , Feng Zhou _{1,

2,

3,

4,

5} , Guangwen Chen _{1,

2,

3,

4}

Affiliation

The kinetics and mass transfer characteristics of the nitration of trifluoromethoxybenzene (TFMB) with a mixed acid were investigated in microchannel reactors. By assuming the intrinsic reaction as the rate-determining step, a quasi-homogeneous reaction kinetic model was proposed and utilized to calculate the observed rate constant. The intrinsic reaction rate constant was then calculated by virtue of an activity coefficient function, M_c function. To identify the heterogeneous reaction regime, the Hatta number was obtained, which was in the range of 0.018 to 0.081. The low value of the Hatta number justified the previous assumption. Moreover, the proposed model was utilized to predict the product yields in the microchannel reactor, which are also in great agreement with the experimental results.

中文翻译：

三氟甲氧基苯异质连续流硝化的动力学研究†

在微通道反应器中研究了用混合酸硝化三氟甲氧基苯（TFMB）的动力学和传质特性。通过将本征反应作为决定速率的步骤，提出了一种准均相反应动力学模型，并利用该模型来计算观察到的速率常数。然后借助活度系数函数M _c函数计算本征反应速率常数。为了鉴定异质反应方案，获得了Hatta数，其在0.018至0.081的范围内。哈达数的低值证明了先前的假设是正确的。此外，所提出的模型被用来预测微通道反应器中的产物产率，这也与实验结果非常吻合。

更新日期：2018-04-23

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