Temperature distribution in a gas-solid fixed bed probed by rapid magnetic resonance imaging
Abstract
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. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000594103Publication status
publishedExternal links
Journal / series
Chemical Engineering ScienceVolume
Pages / Article No.
Publisher
ElsevierSubject
MRI thermometry; PRF thermometry; Real-time MRI; Fixed bed reactorsOrganisational unit
03865 - Müller, Christoph R. / Müller, Christoph R.
03628 - Prüssmann, Klaas P. / Prüssmann, Klaas P.
Funding
182692 - Understanding multi-phase particulate systems: from (reactive) gas-fluidized beds to dense suspensions via advanced magnetic resonance imaging (MRI) and Lagrangian modeling (SNF)
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