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Title (Primary) Upgrading Kolbe electrolysis – Highly efficient production of green fuels and solvents by coupling biosynthesis and electrosynthesis
Author Teetz, N.; Holtmann, D.; Harnisch, F.; Stöckl, M.
Journal Angewandte Chemie-International Edition
Year 2022
Department UMB
Volume 61
Issue 50
Page From e202210596
Language englisch
Topic T7 Bioeconomy
Supplements https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fanie.202210596&file=anie202210596-s1-Teetz_et_al_2022_accepted_supporting_information.pdf
Keywords Kolbe electrolysis; Biosynthesis; Process coupling; Cupriavidus necator; Electrobiorefinery
Abstract The chemical industry is transitioning to more sustainable and biobased processes. One key element of this transition is coupling energy fluxes and feedstock utilization for optimizing processes, routes and efficiencies. Here, we show for the first time the coupling of the Kolbe electrolysis at the anode with a subsequent microbial conversion of the cathodically produced co-product hydrogen. Kolbe electrolysis of valeric acid yields the liquid drop-in fuel additive n-octane. Subsequently, the solvent isopropanol is produced by resting Cupriavidus necator cells using gaseous electrolysis products (esp. CO2 and H2). The resting microbial cells show carbon efficiencies of up to 41% and coulombic/faradaic efficiencies of 60% and 80% for anodic and cathodic reactions, respectively. The implementation of a paired electrolyzer resulted in superior process performances with overall efficiencies of up to 64.4%.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26652
Teetz, N., Holtmann, D., Harnisch, F., Stöckl, M. (2022):
Upgrading Kolbe electrolysis – Highly efficient production of green fuels and solvents by coupling biosynthesis and electrosynthesis
Angew. Chem.-Int. Edit. 61 (50), e202210596