The 3D-Printing Fabrication of Multichannel Silicone Microreactors for Catalytic Applications

Microstructured reactors (MSRs) are especially indicated for highly demanding heterogeneous catalysis due to the small channel dimensions that minimize diffusional limitations and enhance mass heat transport between fluid catalyst. Herein, we present fabrication protocol of fused filament 3D printing silicone monolithic microreactors based on a multichannel design. Microchannels 200 800 µm in width up 20 mm length were developed following scaffold-removal procedure using acrylonitrile butadiene styrene (ABS) as material 3D-printed scaffold fabrication, polydimethylsiloxane (PDMS) building material, acetone ABS removing agent. The main parameters such temperature velocity optimized order bridging effect collapsing intercrossing. Heterogeneous catalysts incorporated into microchannel walls during thus avoiding further post-processing steps. nanoparticulated catalyst was deposited scaffolds through dip coating transferred PDMS pouring step subsequent removal. Two different designs tested four catalytic applications, namely liquid-phase 2-nitrophenol photohydrogenation methylene blue photodegradation aqueous media, lignin depolymerization ethanol, gas-phase CO2 hydrogenation, investigate microreactor performance under reaction conditions (temperature solvent) establish possible range applications.