Continuous Photo-Electro-Catalytic Synthesis of Bio-Based Adipic Acid with Reaction Kinetics Modeling |
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| Authors: | Luka Suhadolnik David Bajec Dušan Žigon Miran Čeh Blaž Likozar |
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| Affiliation: | 1. Jožef Stefan Institute, Department for Nanostructured Materials, Jamova 39, SI-1000 Ljubljana, Slovenia;2. National Institute of Chemistry, Laboratory of Catalysis and Chemical Reaction Engineering, Hajdrihova 19, SI-1000 Ljubljana, Slovenia;3. Jožef Stefan Institute, Department of Environmental Sciences, Jamova 39, SI-1000 Ljubljana, Slovenia |
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| Abstract: | Photo-electro-catalytic oxidation reactions of 1,6-hexanediol were carried out in a coil-type continuous-flow microreactor with an immobilized TiO2 catalyst material. Bio-based adipic acid was formed as the only intermediate product before the total mineralization process. The production was stable, enabling green, selective and continuous resource conversion, but with low, non-optimized yields. In addition, the catalyzed chemical kinetics was modeled, based on mechanisms as well as approximated rate-determining steps. The Butler-Volmer relation was used for activation. The electro-catalytic oxidative pathway was demonstrated to dominate over photo-catalysis, also on account of the band gap characteristics of the titania nanotube electrode. |
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| Keywords: | Adipic acid production Continuous-flow reactor Organic synthesis Photo-electro-catalysis TiO2-nanotube catalyst |
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