This research is focused on development of robust methodology based on operando Raman spectroscopy for local temperature measurement of catalyst within a chemical reactor. The aim is to study suitablity of intensities, positions, and widths of Raman lines of metal oxides and supports (reducible and non-reducible) to investigate its applicability, viability, local temperature gradients, hotspots as well as potential temperature oscillations.
This research aims to develop operando Raman thermometery as a reliable and non-invasive technique for accurately measuring temperature within packed catalyst reactors beds. Precise temeprature monitoring is essential for maintaining stable and efficient chemical processes, as uneven heat distribution can lead to hotspots, reactor runaways, and premature catalyst deactivation. Currently, multipoint thermocouples are commonly used for temperature measurements, but they have several limitations. Their performance can be affected by corrosive gases, and their intrusive design may cause pressure drops, heat leaks, and flow disturbances within the reactor bed. Additionally, thermocouples cannot directly measure the surface or subsurface temperature of catalyst particles.
This research explores Raman thermometry as an alternative method capable of providing true local temperature measurements directly on catalyst materials under operating conditions. By studying catalytic systems in lab-scale reactors over extended periods, including regeneration cycles, the project aims to establish reliable measurement and design protocols. Ultimately, this approach could enable more accurate temperature control, improving the efficiency, safety, and sustainability of industrial catalytic processes.
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