Aerobic oxidation of benzyl alcohol in a slug flow microreactor: Influence of liquid film wetting on mass transferHommes, A., Disselhorst, B. & Yue, J., 19-Oct-2020, In : AIChE Journal. 66, 11, 14 p., e17005.
Research output: Contribution to journal › Article › Academic › peer-review
Homogeneous Co/Mn/Br catalyzed aerobic oxidation of benzyl alcohol in acetic acid to benzaldehyde was performed in polytetrafluoroethylene microreactors operated under slug flow at temperatures up to 150 degrees C and pressures up to 5 bar. Depending on the bubble velocity and length, a wetted or dewetted slug flow was observed, characterized typically by a complete or partially wetting liquid film around the bubble body. The latter flow suffered from a limited interfacial area for mass transfer. Experiments at temperatures up to ca. 90 degrees C were under kinetic control given no product yield difference under wetted and dewetted slug flows and were used to establish a simplified kinetic expression (first order in benzyl alcohol and zero order in oxygen). This allows to develop a mass transfer model combined with an instantaneous reaction regime that well described the experimental results at higher temperatures where mass transfer was limiting in the dewetted slug flow.
|Number of pages||14|
|Early online date||21-Aug-2020|
|Publication status||Published - 19-Oct-2020|
- benzyl alcohol oxidation, mass transfer, microreactor, slug flow, wettability, P-XYLENE OXIDATION, GAS-LIQUID, 2-PHASE FLOW, ACETIC-ACID, 2,5-FURANDICARBOXYLIC ACID, CATALYZED OXIDATION, TEREPHTHALIC ACID, PHASE OXIDATION, PRESSURE-DROP, AIR-OXIDATION