MICROPHASE AUTOCATALYSIS - IMPORTANCE OF NEAR-INTERFACE EFFECTS

The rate-enhancing strategy of microphase catalysis utilizes a microdi spersed phase which shows a high affinity for the diffusing (rate-limi ting) solute. When an intermediate/product constitutes the microphase, the rates computed on the basis of a quasi-steady-state theory of mic rophase catalysis are underpredicted. Mathematical models, utilizing a simplified population balance approach in the ''film zone'', have bee n developed to determine the extent and nature of the transient effect s due to the microphase, which are ignored in the quasi-steady-state v ersions. Thus, an attempt has been made to focus on the ''near interfa ce effects'' of the precipitating microphase. It has been demonstrated that these effects are of tremendous significance.