Abstract
In the Carbon Capture and Utilization (CCU) process, the conversion of captured CO2 into valuable chemicals and fuels, such as CO, CH3OH, CxHy, or CH4 represents a compelling alternative. These CO2 utilization reactions, utilizing hydrogen, produce H2O as a significant byproduct. This is detrimental as it diminishes reaction efficiency due to catalyst deactivation, water-based side reactions, and equilibrium limits. Although in-situ H2O removal can enhance product yield and reaction efficiency, selectively removing H2O at elevated reaction temperatures poses a considerable challenge. In this study, we synthesized polybenzoxazole (PBO) hollow fibers through the thermal treatment of hydroxyl polyimide and incorporated them into a fixed-bed reactor for CO2 methanation. The PBO membrane exhibited notable H2O permselectivity at elevated temperatures (350 ℃). When compared to a conventional reactor lacking the membrane, the PBO membrane reactor demonstrated increased CO2 conversion and CH4 selectivity owing to the selective removal of water.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have