(569fg) Biomass Derived CO2-Rich Syngas Conversion to Fuels in 3D-Printed Stainless Steel (SS) Microreactor

The CoRu-KIT-6 catalyst, synthesized via a one-pot hydrothermal approach, was employed in Fischer-Tropsch Synthesis (FTS) of syngas containing CO₂ at 20 bar in a microreactor fabricated via 3D printing. Various characterization techniques, including N₂ adsorption-desorption, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray diffraction (XRD), H₂-Temperature programmed reduction (H₂-TPR), and X-ray photoelectron spectroscopy (XPS), were utilized to analyze the catalyst. The catalyst exhibited a considerable BET surface area (N₂ adsorption-desorption) alongside low reduction temperatures (H₂-TPR) for the metals. Moreover, low-angle XRD, SEM, and TEM investigations revealed the preservation of KIT-6's mesoporous silica structure after metal incorporation. The XPS findings were supported by H₂-TPR analysis. Four distinct compositions of CO₂/CO/H₂ were employed for tailored F-T synthesis. As the reaction temperature increased, CO₂ conversion rose, while CO conversion was influenced by the CO₂ quantity in the gas feed mixtures. The catalyst demonstrated exceptional catalytic performance in terms of CO conversion. The CO₂-rich syngas composition (CO₂:CO: H₂=25:25:50) showed the best result in terms of conversion and hydrocarbon selectivity.