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 concentration. Developing efficient and stable adsorbents for CO capture as well as understanding their transport diffusion limitations for CO utilisation plays a crucial role in CCUS technology development. However, experimental data available on CO 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 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 / = 0.15 the total CO uptake of the modified material improves and that the introduction of small amounts of water enhances the diffusion of CO. 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.
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| http://dx.doi.org/10.1039/d1ra01118a | DOI Listing |
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