Document Type
Article
Publication Date
2-17-2010
Journal or Book Title
Industrial & Engineering Chemistry Research
Volume
49
Issue
4
First Page
1931
Last Page
1936
DOI
10.1021/ie901311r
Abstract
Gas holdup and superficial liquid velocity in the downcomer and riser are studied for an external loop airlift reactor with a downcomer-to-riser area ratio of 1:16. Two downcomer configurations are investigated over a range of superficial gas velocities (0.5 ≤ UG ≤ 20 cm/s) using three aeration plate open area ratios (A = 0.62, 0.99, and 2.22%). These results are compared to a bubble column operated with similar operating conditions. Gas holdup in both the riser and downcomer are found to increase with increasing superficial gas velocity. Results show that riser gas holdup varies slightly with downcomer configuration, while a considerable variation is observed for downcomer gas holdup. The superficial liquid velocity varies considerably for the two downcomer configurations and is a function of superficial gas velocity and flow conditions in the downcomer. Observed variations are independent of aeration plate open area ratio.
Copyright Owner
American Chemical Society
Copyright Date
2010
Language
en
File Format
application/pdf
Recommended Citation
Jones, Samuel T. and Heindel, Theodore J., "Hydrodynamic Considerations in an External Loop Airlift Reactor with a Modified Downcomer" (2010). Mechanical Engineering Publications. 16.
https://lib.dr.iastate.edu/me_pubs/16
Comments
Reprinted with permission from Industrial & Engineering Chemistry Research 49 (2010): 1931–1936, doi:10.1021/ie901311r. Copyright 2010 American Chemical Society.