Subproject DT04 is about the design, characterization and optimization of 3D printed periodic open-cell structures (POCS). One major property of the POCS is that these structures serve to tailor residence time distributions, catalytic reaction surfaces, and exchange processes of multiphase flows close to the boundary layer to the process. In addition, POCS increase the mass transport and thus the selectivity and yield. The most up-to-date additive manufacturing technologies, such as rapid prototyping, can be used to produce the POCS. Moreover, high-resolution imaging techniques, such as laser-induced fluorescence (LIF) or particle image velocimetry (PIV), enable the study of the interaction of boundary-layer dynamics and the reaction in the millisecond range. Furthermore, numerical simulations are performed to support the experiments and to optimize various reactor configurations.
The structures thus developed are used in various collaborations: for example, as a catalyst support and for the definition of the residence time in the profile reactor of propylene epoxidation (Prof. Horn) in cooperation with selective membrane technology (HZG) or as a carrier of immobilized enzymes in the biochemical process (Prof. Liese) or even to support electro-biochemical synthesis (Prof. Zeng). Knowhow in the selection and evaluation of materials (Prof. Fiedler) as well as the expertise in 3D printing (Prof. Luinstra / UHH) are essential.