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9
Process Intensification
9.1 Motivation for Process Intensification
in Foam Fractionation
It is a common experience of foam fractionation researchers that, in a con-
ventional foam fractionation column, the various operating parameters
have competing effects on the enrichment and recovery of a foam fraction-
ation process (Wood and Tran, 1966; Lemlich, 1968; Timmons etal., 1995).
For instance, among the two principal process control parameters (i.e., the
supercial gas velocity and the bubble size), an increase in supercial gas
velocity increases the ux of surface area and thus improves recovery, but at
the same time it results in a higher ...