Fig. 4: Gas sorption isotherms and dynamic column breakthrough separations for P4-am and (+)-NDI-Δ.
From: Bottom-up computational design of shape-selective organic macrocycles for humid CO2 capture
a, CO2 (273 K and 298 K) and N2 (298 K) isotherms for (+)-NDI-Δ. b, CO2 (273 K and 298 K) and N2 (298 K) isotherms for P4-am. c, Calculated experimental isosteric heat of adsorption for CO2 on (+)-NDI-Δ, P4-am and P4-α. d, Experimental breakthrough curves for CO2/N2 separations under dry and humid conditions (75% relative humidity) for (+)-NDI-Δ (left) and P4-am (right) (85/15 v/v N2/CO2). C0 is the concentration of the corresponding gas in the inlet gas mixture, and CA is its concentration at the outlet during breakthrough. e, Working CO2 capture capacity profiles for (+)-NDI-Δ and P4-am during breakthrough experiments under dry and humid conditions. The sorbent was pre-saturated by water; 75% relative humidity for humid conditions; 85/15 v/v N2/CO2; 298 K; 1 bar. f, Benchmarking the CO2 working capacity of (+)-NDI-Δ and P4-am against Carboxen 572 (a commercial activated carbon) and zeolite 13X under dry and humid conditions (pre-saturated by water for humid conditions, 85/15 v/v N2/CO2; 298 K; 1 bar) showing ten cycles of breakthrough experiments.
