Fluorinated MIL-101 for carbon capture utilisation and storage: uptake and diffusion studies under relevant industrial conditions.

Carbon capture utilisation and storage (CCUS) using solid sorbents such as zeolites, activated carbon and Metal-Organic Frameworks (MOFs) could facilitate the reduction of anthropogenic CO 2 concentration. Developing efficient and stable adsorbents for CO 2 capture as well as understanding their transport diffusion limitations for CO 2 utilisation plays a crucial role in CCUS technology development. However, experimental data available on CO 2 capture and diffusion under relevant industrial conditions is very limited, particularly for MOFs. In this study we explore the use of a gravimetric Dynamic Vapour Sorption (DVS) instrument to measure low concentration CO 2 uptake and adsorption kinetics on a novel partially fluorinated MIL-101(Cr) saturated with different water vapour concentrations, at ambient pressure and temperature. Results show that up to water P / P 0 = 0.15 the total CO 2 uptake of the modified material improves and that the introduction of small amounts of water enhances the diffusion of CO 2 . MIL-101(Cr)-4F(1%) proved to be a stable material under moist conditions compared to other industrial MOFs, allowing facile regeneration under relevant industrial conditions.