(63f) CO2 Adsorption on Mesoporous Porous Silica Surfaces Containing Amine-Like Motifs

Post combustion separation of CO₂ from flue gas mixtures is a crucial unit operation in the carbon capture technology. In the established technologies, CO₂ is normally separated with alkanolamines aqueous solution or liquid ammonia. These absorption processes are energy intense and costly. Increased environmental attention and the significant footprints of carbon and hydrocarbon based energy sources warrants new gas separation technologies (cleaner and more cost-effective) to be developed - for a competitive implementation of carbon capture and storage technologies. Advanced liquids, inorganic or polymer membranes, and improved adsorbents have been put forward as candidate materials for such new low energy cost processes. Here, we will discuss CO₂ adsorbents related to post-combustion CO₂ separation process. In some detail, chemically modified mesoporous solids will be discussed. Certain chemical aspects of functional mesoporous silica with amine-like motifs, will discussed together with related analyses. The temperature and pressure dependent adsorption of CO₂ and CO₂/ H₂Omixtures, on such mesoporous modified silica materials, will be presented and compared. Finally, the findings will be discussed in a broader context and compared with other potential adsorbents, including microporous and mesoporous adsorbents.