Experimentelle Untersuchung der Ablagerungsmechanismen beim Polymerisationsfouling

Hohlen, Annika; Augustin, Wolfgang

doi:10.1002/cite.202055021

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2023

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“…Both described processes are known as reaction fouling. [12] However, in real multiphase systems, the origin of the fouling product is difficult to predict, since both mechanisms interact und run in parallel, as described in [13] and illustrated in [14]. Currently, reaction fouling is being discussed as the mechanism that mainly contributes to fouling [15].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Polymeric Fouling in a Continuous Reactor by Electrochemical Impedance Spectroscopy

Neßlinger,

Rust,

Atlanov

et al. 2023

Chemie Ingenieur Technik

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Monitoring early stages of polymeric deposit formation and its prevention were studied by in‐situ electrochemical impedance spectroscopy (EIS) in a continuously operating reactor employed for polymer production. An EIS flow cell was designed and employed during the emulsion polymerization of vinyl acetate. The electrochemical analysis of the complex impedance at the solution/reactor interface allows the time‐resolved detection of film formation processes. In comparison to oxide‐covered stainless steel, an anti‐adhesive sol‐gel coated alloy showed a significant inhibition of poly(vinyl acetate) fouling. The EIS‐based approach proved to be a valuable tool for monitoring both thin barrier film performance and fouling processes under harsh process conditions.

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