2022/11/24 by M. Raquel Serial, Stefan Benders, Serial, M. Raquel +17 · 1 citation
Engineering · Medicine · #Advanced MRI Techniques and Applications #FOS: Physical sciences #Hydrocarbon exploration and reservoir analysis #Nuclear reactor physics and engineering #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.2211.13599
openalex publication_date 2022/11/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Controlling the temperature distribution inside catalytic fixed bed reactors is crucial for yield optimization and process stability. Yet, in situ temperature measurements with spatial and temporal resolution are still challenging. In this work, we perform temperature measurements in a cylindrical fixed bed reactor by combining the capabilities of real-time magnetic resonance imaging (MRI) with the temperature-dependent proton resonance frequency (PRF) shift of water. Three-dimensional (3D) temperature maps are acquired while heating the bed from room temperature to 60~∘C using hot air. The obtained results show a clear temperature gradient along the axial and radial dimensions and agree with optical temperature probe measurements with an average error of ± 1.5~∘C. We believe that the MR thermometry methodology presented here opens new perspectives for the fundamental study of mass and heat transfer in gas-solid fixed beds and in the future might be extended to the study of reactive gas-solid systems.