✦ LIBER ✦

The transient response of bubble columns

✍ Scribed by David S. Van Vuuren

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 765 KB
Volume: 43
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(88)85033-4

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✦ Synopsis

A two-phase model that incorporates axial dispersion in both phases, as well as interphase mass transfer, is used to simulate the transient response of bubble columns. The time-domain solution is obtained by inverting the Laplace domain solution via a Fourier series approximation technique. Using the solution obtained, the validity of model simplifications that have appeared in the literature is evaluated by comparing the predictions of those models. These simplifications are found to give low errors only under &eci~ conditions. A parametric study of proposed pulse experiments in bubble columns simulating Fischer-Tropsch slurry reactors showed that model simplifications are invalid for these experimental conditions. Both the internhase mass transfer and the gas-phase axial dispersion affect the pulse response of the gas phase significantly.

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