Resumen de CO2 Storage on Zeolites and Other Adsorbents
Maria João Barbosa Regufe, Ana M. Ribeiro-Ferreira Nunes, Alexandre F. P. Ferreira, Alírio Egídio Rodrigues
Historically carbon dioxide removal from gaseous streams has been done by applying physical or chemical absorption. However, diverse factors lead to the search for alternative technologies for CO2 separation, such as adsorption technologies. Nanoporous adsorbents are a subset of porous materials typically with porosities larger than 0.4 and porous diameter of up to 100 nm, as defined by International Union of Pure and Applied Chemistry (IUPAC) since 2015. This class spans through the three classic classes of pores, micropores, mesopores and macropores. Comparing with other types of materials, nanoporous ones possess unique properties, which make them the most desired adsorbents for this application, such as, high CO2 adsorption capacity, high selectivity, full regeneration capacity, favourable adsorption kinetics, good mechanical properties, durability and stability.
In this chapter, one of the main classes of materials applied in adsorption processes, zeolite adsorbents, is considered. In addition, other important inorganic materials for CO2 adsorption and storage, such as silicoaluminophosphates (SAPOs) and aluminophosphates (AlPOs), hydrotalcites and metal oxides, are reviewed.
