Fine Bubble‐based CO2 Capture Mediated by Triethanolamine Coupled to Whole Cell Biotransformation

Carbon capture technology can be set up in combination with biocatalysis to utilize the bound CO2 as substrate in the Kolbe‐Schmitt like enzymatic reaction. The exemplary whole cell biotransformation of catechol to 2,3‐dihydroxybenzoic acid in a triethanolamine‐mediated multiphase system shows increased equilibrium conversion. Apart from the beneficial thermodynamics, the inherent fluid properties of triethanolamine is enabling easy application of CO2 fine bubbles as highly efficient gassing method to minimize the CO2 demand and CO2 emissions. Biocatalytic carboxylation reactions can be combined with the amine‐mediated system, which utilizes CO2 as feedstock in the production of high valuable benzoic acid derivatives. The application of fine bubbles for a more efficient gassing and the yield optimization are examined for different CO2 loadings by variation of triethanolamine content.