Particle-Resolved Computational Fluid Dynamics as the Basis for Thermal Process Intensification of Fixed-Bed Reactors on Multiple Scales

Nico Jurtz, Urvashi Srivastava, Alireza Attari Moghaddam and Matthias Kraume
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Nico Jurtz: Chemical & Process Engineering, Technische Universität Berlin, Ackerstr. 76, 13355 Berlin, Germany
Urvashi Srivastava: Clariant Corporation, BU Catalysts, 1600 West Hill Street, Louisville, KY 40210, USA
Alireza Attari Moghaddam: Clariant Produkte (Deutschland) GmbH, Arabellastr. 4a, 81925 Munich, Germany
Matthias Kraume: Chemical & Process Engineering, Technische Universität Berlin, Ackerstr. 76, 13355 Berlin, Germany

Energies, 2021, vol. 14, issue 10, 1-24

Abstract: Process intensification of catalytic fixed-bed reactors is of vital interest and can be conducted on different length scales, ranging from the molecular scale to the pellet scale to the plant scale. Particle-resolved computational fluid dynamics (CFD) is used to characterize different reactor designs regarding optimized heat transport characteristics on the pellet scale. Packings of cylinders, Raschig rings, four-hole cylinders, and spheres were investigated regarding their impact on bed morphology, fluid dynamics, and heat transport, whereby for the latter particle shape, the influence of macroscopic wall structures on the radial heat transport was also studied. Key performance indicators such as the global heat transfer coefficient and the specific pressure drop were evaluated to compare the thermal performance of the different designs. For plant-scale intensification, effective transport parameters that are needed for simplified pseudo-homogeneous two-dimensional plug flow models were determined from the CFD results, and the accuracy of the simplified modeling approach was judged.

Keywords: fixed-bed reactor; wall structures; complex particle shapes; process intensification; heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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