Decrease in the Adsorption Capacity of Adsorbents in the High-Temperature Carbonate Loop Process for CO2 Capture

In this study, the sorption capacity of limestone samples for CO2 was investigated to determine conditions under which they can be used in high-temperature carbonate loop process. For work, from Czech Republic were used, contained a high proportion CaO (more than 97 wt.%). A total 20 cycles calcination (950 °C) and subsequent sorption–carbonation (650 performed each sample tested. The towards 20th cycle less 10% value determined first carbonation most significant decrease observed between second cycles. highest Branžovy sample, captured 268 mL CO2/per 1 g sorbent by chemisorption. Only 15 carbon dioxide per bound physisorption. However, repeated use, Vitošov had CO2. all samples, amount physisorption range 4 Due sintering material, BET specific surface area decreased 95 96%.