Hydrodynamics and heat transfer in packed bed with cocurrent upflow

✍ Scribed by A.S. Lamine; M.T. Colli Serrano; G. Wild

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 814 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)85062-g

✦ Synopsis

The authors investigate radial heat transfer in packed columns with cocunent upflow of gas and liquid. The experiments are performed in a packed bed electrically heated through its wall, with flow of water and saturated nitrogen The packing diameter has been varied from 1 to 6 mm, and the reactor inner diameter is either 50 or 1OOmm. Radial and axial temperature profiles are measured inside the ckedbed.ThelXat transfer parameters of the packed bed are obtained by fitting the parameters o p" a two-dimensional, homogeneous model to the measured profiXes: the radial effective thermal conductivity of the packed bed (Ar). and the wall heat transfer coefficient (aw). The liquid holdup is measured by conductimetric probes, using a salt tracer technique. The heat transfer in the packed bed strongly depends on the flow regimes. A discussion on the flow regimes and on liquid holdup estimation is first presented and then heat transfer results and comlaricms are proposed for each fIow regime : scpamd flow, bubble flow and pulsed flow.