https://doi.org/10.1007/s12034-019-1936-8
“A breakthrough curve is very much useful to characterize the nature of an adsorbent. To estimate the CO2CO2 capture capacity of the synthesized adsorbents, breakthrough curves were generated at a fixed temperature. Typical breakthrough curves for the virgin ZSM-5 and 30 wt% amine-impregnated ZSM-5 are shown in figure 5. The breakthrough time is noted when the outlet concentration (Ce)Ce) of CO2CO2 reached 5% of the feed CO2CO2 concentration (Co)Co). The plots show that the breakthrough time of the 30% amine-loaded sorbents is around 2 to 3 times higher than that of the virgin ZSM-5. A longer breakthrough time indicates the higher capture capacity of the adsorbents. The CO2CO2 capture capacity of the adsorbents up to breakthrough (at Ce/Co=0.05)Ce/Co=0.05) and exhaustion point (at Ce/Co=0.95)Ce/Co=0.95) is tabulated in table 2 along with the breakthrough time. Among the adsorbents studied in the present work, the 30-TETA-ZSM-5 material shows the maximum capture capacity at 30∘C30∘C. The variation of CO2CO2 capture capacity of the support and amine-impregnated materials is explained in the subsequent sections.”
