Stability Analysis of Reactive Multiphase Slug Flows in Microchannels
AbstractConducting multiphase reactions in micro-reactors is a promising strategy for intensifying chemical and biochemical processes. A major unresolved challenge is to exploit the considerable benefits offered by micro-scale operation for industrial scale throughputs by numbering-up whilst retaining the underlying advantageous flow characteristics of the single channel system in multiple parallel channels. Fabrication and installation tolerances in the individual micro-channels result in different pressure losses and, thus, a fluid maldistribution. In this work, an additional source of maldistribution, namely the flow multiplicities, which can arise in a multiphase reactive or extractive flow in otherwise identical micro-channels, was investigated. A detailed experimental and theoretical analysis of the flow stability with and without reaction for both gas-liquid and liquid-liquid slug flow has been developed. The model has been validated using the extraction of acetic acid from n-heptane with the ionic liquid 1-Ethyl-3-methylimidazolium ethyl sulfate. The results clearly demonstrate that the coupling between flow structure, the extent of reaction/extraction and pressure drop can result in multiple operating states, thus, necessitating an active measurement and control concept to ensure uniform behavior and optimal performance.
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Munera Parra, A.A.; Antweiler, N.; Nagpal, R.; Agar, D.W. Stability Analysis of Reactive Multiphase Slug Flows in Microchannels. Processes 2014, 2, 371-391.
Munera Parra AA, Antweiler N, Nagpal R, Agar DW. Stability Analysis of Reactive Multiphase Slug Flows in Microchannels. Processes. 2014; 2(2):371-391.Chicago/Turabian Style
Munera Parra, Alejandro A.; Antweiler, Nicolai; Nagpal, Rachit; Agar, David W. 2014. "Stability Analysis of Reactive Multiphase Slug Flows in Microchannels." Processes 2, no. 2: 371-391.