Radiotracer Applications in Chemical Process Engineering

Radiotracer methods have emerged as indispensable tools for characterising, diagnosing and optimising chemical process operations. By introducing minute quantities of radioisotopes into reactors, pipelines or mixers, researchers can track the movement of fluids and solids non-invasively, even in opaque or high-pressure systems. Key applications include the measurement of residence time distribution to assess mixer performance, the mapping of velocity fields in multiphase reactors via radioactive particle tracking, and the detection of leaks or blockages in heat exchangers and transport lines. These techniques provide real-time data that complement computational models, enabling more accurate scale-up from laboratory to industrial scales. Globally, radiotracer studies have underpinned improvements in process safety, energy efficiency and product quality across sectors such as petrochemicals, mining, water treatment and pharmaceuticals. By combining experimental precision with mathematical modelling, radiotracer applications continue to drive innovation in reactor design, process troubleshooting and environmental monitoring.

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Radiotracer Applications in Chemical Process Engineering publication trend

The graph below shows the total number of articles in radiotracer applications in chemical process engineering across all publications each year (not limited to Nature Index journals).

Technical terms

Radiotracer: A radioactive isotope introduced into a process stream to monitor movement and concentration of material without altering system behaviour.

Residence Time Distribution (RTD): The probability distribution of times that fluid elements spend inside a reactor or vessel, indicative of mixing efficiency.

Radioactive Particle Tracking (RPT): A technique in which a radioactive particle is followed through a system to measure local velocities and flow patterns in multiphase reactors.

Mixing Time: The period required for a tracer to achieve a specified level of homogeneity within a mixing vessel.

Backmixing: The extent to which flow deviates from ideal plug-flow, leading to recirculation and dispersion of material within a reactor.

Mean Residence Time (MRT): The average time that fluid elements spend in a reactor, calculated from the RTD curve.

References

1. Application of radiotracers as tools to determine feed flowrate imbalances and particle size segregation in industrial flotation circuits. Physicochemical Problems of Mineral Processing (2023).
2. Feasibility of Using Radioactive Particle Tracking as an Alternative Technique for Experimental Investigation in Bubble Column Reactor. IOP Conference Series Materials Science and Engineering (2019).
3. Preliminary study of the use of radiotracers for leak detection in industrial applications. Journal of Physics Conference Series (2015).
4. A study of residence time distribution in a lab scale stirred tank reactor using radiotracer technique. Journal of Physics Conference Series (2019).
5. A study of residence time distribution using radiotracer technique in the large scale plant facility. Journal of Physics Conference Series (2017).
6. Radiotracer Investigation of the Effect of Impeller Type on Mixing in Industrial Process Simulator. Journal of Applied Mathematics and Physics (2018).