Fig. 3. Ammonia breakthrough curves for (a) P1 and (b) P2 polymers under dry (left, solid lines) and humid (right, dashed lines) conditions at 293 K. The challenge concentration (C0) of ammonia in air was 2000 mg m–3 with a flow rate of 20 mL min–1. Once saturation was achieved, desorption curves were obtained upon purging the column with air under the corresponding initial dry or humid condition.
