https://doi.org/10.3390/pr10020422
“In fact, the breakthrough curves at the fixed concentration of CO2 (12%) in Figure 8 confirmed that: for a continuous process, the optimum was obtained with the APTES20 sample. The breakthrough curve had a higher time of breakpoint, indicating that this sorbent could capture CO2 for a longer time during an industrial process. The saturation time was lower than the APTES40 sample time, suggesting that faster adsorption kinetics correlates with greater active surface availability.”

“Figure 8. Breakthrough curves at a fixed concentration of CO2 (12%) for functionalized silica.”