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Mechanical control of foaming in stirred-tank reactors

✍ Scribed by Satoshi Takesono; Masayuki Onodera; Akira Ito; Masanori Yoshida; Kazuaki Yamagiwa; Akira Ohkawa

Publisher
Wiley (John Wiley & Sons)
Year
2001
Tongue
English
Weight
221 KB
Volume
76
Category
Article
ISSN
0268-2575

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✦ Synopsis

Abstract

The foam‐breaking characteristics of rotating‐disk mechanical foam‐breakers (MFRDs) fitted to stirred‐tank reactors (STRs) containing various foaming liquids were evaluated. The critical disk rotational speed, N~c~, required for foam‐breaking and the liquid hold‐up, ϕ~L~, in ascending foam reflected, respectively, the foam‐breaking behaviour of MFRDs and the foaming behaviour of STRs. Empirical equations for the prediction of N~c~ and ϕ~L~, which can be applied independently of the type, concentration and temperature of foaming liquid, were obtained. The foam‐breaking power, P~kc~, of MFRDs was also clarified in relation to the level of ϕ~L~ which is related to the difficulty or ease of mechanical foam‐breaking.

© 2001 Society of Chemical Industry

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