Hydrodynamic study of a flow-rig column by means of a radiotracer technique modelling with DTS-Pro 4

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochimica Acta Pub Date : 2024-07-11 DOI:10.1515/ract-2023-0227

Louisa Bounemia, Chaouki Benazzouz, Mouhamed Belamri

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引用次数: 0

Abstract

The residence time distribution (RTD) is very reliable, providing valuable information about the performance of process equipment such as reactors and columns. The aim of this work is to study the effect of agitation in the hydrodynamic column of flow-rig. In this case, residence time distribution (RTD) is determined using the radiotracer approach. The radiotracer is the Technetium Tc-99m with half decay 6 h. It also emits gamma rays with an energy of 0.140 MeV. 2 mL of approximately 9 mCi activity Tc-99m was injected inside the column. The results show that in the conditions studied the column presents the anomaly, dead volume. The Intensity function A(t) confirms this result. Agitation has a beneficial effect in the reduction of dead volume. To revise the conception of the column or study other parameters like the variation flow rate can reduce or eliminate the dead volume. The RTD model indicated the column behaved as a Plug flow reactor (PFR) with mixing cells in serie (J = 4) model and the RTD experiment verified the model well.

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利用 DTS-Pro 4 进行放射性示踪技术建模，对流动钻杆柱进行流体力学研究

停留时间分布（RTD）非常可靠，可为反应器和塔等工艺设备的性能提供有价值的信息。这项工作的目的是研究流动钻机流体动力柱中搅拌的影响。在这种情况下，采用放射性示踪剂方法确定停留时间分布（RTD）。放射性示踪剂是半衰期为 6 h 的锝 Tc-99m，它还能发射能量为 0.140 MeV 的伽马射线。2 mL 约 9 mCi 活性的 Tc-99m 被注入色谱柱内。结果表明，在所研究的条件下，色谱柱出现了异常，即死体积。强度函数 A(t) 证实了这一结果。搅拌对减少死体积有好处。修改色谱柱的设计或研究其他参数（如变化流速）可以减少或消除死体积。热电阻模型表明，色谱柱表现为带有串联（J = 4）混合单元的塞流反应器（PFR）模型，热电阻实验很好地验证了该模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiochimica Acta 化学-核科学技术

CiteScore

2.90

自引率

16.70%

发文量

审稿时长

6 months

期刊介绍： Radiochimica Acta publishes manuscripts encompassing chemical aspects of nuclear science and technology.