A new model has been developed to describe the curve of three-phase mass tr
asfer with non-linear equilibrium between a continuous and dispersed phases
. An improved homogeneous model was applied, which takes into account the d
iffusion and chemical reaction in the dispersed phase. The non-linear isoth
erm was correlated by two or three linear segments. The absorption rate can
be calculated for all mass-trasfer and reaction kinetic parameters in the
case of first- and zero-order reactions. The film-penetration theory was us
ed involving, as limiting cases, the absorption rates for film and surface
renewal theories. The model introduced here involves, as limiting cases, pr
evious models known from the literature. (C) 1999 Elsevier Science S.A. All
rights reserved.