A model for a foam‐bed slurry reactor

Abstract

A typical foam-bed reactor is a shallow pool of liquid above a gas distributor with a tall column of foam above it. Foam is generated by passing a gas through the pool of liquid, which is either self-foaming or contains a surfactant. Such a foam-bed reactor can be operated in various modes: semibatch, continuous flow, refluxed, and countercurrent. In all these modes, the distorted foam bubbles rise upward along with the liquid films surrounding them. The films of liquid drain continuously in the process and attain, in certain cases, a thickness a t which the foam breaks and the gas escapes. Alternatively, foam has to be broken mechanically to separate gas from the liquid. Many investigators (Helsby

Measurement of surface‐transfer coefficient values for CO2 absorption in lime solutions in presence of surfactants

“…In the present work, the observed values of k s for Triton X‐100, in the concentration range 320–2,400 ppm, vary from 0.566 × 10 −4 to 0.851 × 10 −4 m s −1 . These values lie in the range of k s values for Triton X‐100 reported by Shah and Mahalingam (1984); and Asolekar et al (1988), who employed similar systems and conditions for their studies.…”

“…For Triton X‐100, widely different semi‐theoretical values of k s have been reported by various investigators. The values of k s reported by Shah and Mahalingam (1984); and Asolekar et al (1988) are 0.018 × 10 −4 and 37.4 × 10 −4 m s −1 , respectively. The former value has been calculated from the reported (Shah and Mahalingam, 1984) values of k s H s = 1.27 × 10 −11 kmol (m 2 Pa s) −1 and H s = 6.9 × 10 −6 kmol (m 3 Pa) −1 .…”