Kinetics and computational fluid dynamics study for Fischer–Tropsch synthesis in microchannel and fixed-bed reactors†,Reaction Chemistry & Engineering

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Kinetics and computational fluid dynamics study for Fischer–Tropsch synthesis in microchannel and fixed-bed reactors†
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2018-03-21 00:00:00 , DOI: 10.1039/c8re00018b
Aditya Rai _{1,

2,

3,

4,

5} , Mohit Anand _{1,

2,

3,

4,

5} , Saleem A. Farooqui _{1,

2,

3,

4,

5} , Malayil G. Sibi _{1,

2,

3,

4,

5} , Anil K. Sinha _{1,

2,

3,

4,

5}

Affiliation

The effect of operating conditions on the hydrocarbon yield distribution during Fischer–Tropsch synthesis (FTS) in a microchannel reactor was studied. A power law-based kinetic model was developed for the first time in microchannel and fixed bed reactors for FTS reactions. The activation energy calculated was 90.16 kJ mol⁻¹ and 106.17 kJ mol⁻¹ in the microchannel reactor and fixed bed reactor, respectively. In a single pass run, the CO conversion obtained in the microchannel reactor was more than 92%, while it was 70% in the fixed bed reactor over the same catalyst. The concentration and temperature profile are predicted in both fixed bed and microchannel reactors. As expected, there was no axial concentration gradient observed in the microchannel reactor. Under adiabatic conditions, kinetic and thermodynamic study simulations showed an increase in reactor temperature from 598 K to 639 K in the microchannel reactor and 598 K to 607 K in the fixed bed reactor. The heat produced per unit volume of the microchannel reactor is higher due to a higher rate of the reaction compared to that in the fixed bed reactor.

中文翻译：

微通道和固定床反应器中费托合成的动力学和计算流体动力学研究†

研究了微通道反应器中费托合成（FTS）过程中操作条件对烃产量分布的影响。在基于微通道和固定床的FTS反应中，首次开发了基于幂律的动力学模型。计算出的活化能为90.16 kJ mol ^-1和106.17 kJ mol ^-1分别在微通道反应器和固定床反应器中在单程运行中，与相同的催化剂相比，在微通道反应器中获得的CO转化率超过92％，而在固定床反应器中则达到70％。在固定床和微通道反应器中都预测了浓度和温度分布。如预期的那样，在微通道反应器中没有观察到轴向浓度梯度。在绝热条件下，动力学和热力学研究模拟表明，微通道反应器的反应器温度从598 K升高到639 K，固定床反应器的反应器温度从598 K升高到607K。与固定床反应器相比，由于更高的反应速率，每单位体积微通道反应器产生的热量更高。

更新日期：2018-03-21

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