Cu-BDC MOF/CNFs hybrids for rapid CO2 capture in a circulating fluidized bed via temperature swing adsorption process

Abstract

The research aimed to evaluate the effectiveness of Cu-BDC MOF/CNFs hybrid sorbents in capturing CO2 in post-combustion processes. Various analytical techniques were used to analyze the adsorption materials, including XRD, FTIR, TGA, FE-SEM, EDS, BET, and elemental mapping. Capture performance evaluations were conducted using a fluidized-bed system and temperature swing adsorption on a laboratory scale. The Cu-BDC MOF/CNFs hybrids demonstrated their highest sorption capacity at 90 °C. Working capacity evaluations at a regeneration temperature of 120 °C consistently measured an average of 1.34 mol/kg, with a negligible standard deviation of 0.01 mol/kg. Cyclic tests were performed to assess the sorbents' performance, revealing efficient and rapid desorption of adsorbed CO2 within a short duration. Furthermore, 90 % of the sorption capacity was achieved within 5 min. These findings highlight the potential of Cu-BDC MOF/CNFs hybrid sorbents for CO2 capture in post-combustion processes.