The polymeric ionic liquids/mesoporous alumina composites: Synthesis, characterization and CO2 capture performance test

The CO 2 capture materials and technology have received much attention in recent years due to the environmental deterioration caused by the greenhouse gas emissions . Several imidazolium polymeric ionic liquids (PILs) were synthesized and immobilized on mesoporous γ-Al 2 O 3 (MA) using ultrasonic immersion method. The prepared adsorbents were characterized by FT-IR, 1 H NMR, EA , TGA , SEM, XRD , BET and TEM, indicating the successful synthesis of the desired PILs/MA. The CO 2 adsorption capacity was investigated under different loading ratios, temperatures, pressures and CO 2 flow rates , whose optimal adsorption conditions were 1/1, 313 K, 5 bar and 10 mL/min, respectively. Moreover, the adsorption curves for P[VCIm]Cl/MA were coincident with pseudo-second order model, and the CO 2 adsorption kinetics model was calculated and obtained. Compared with P[VRIm]Cl and P[VEIm]Cl, P[VCIm]Cl/MA demonstrated an outstanding adsorption amount of 0.562 mmol/g under the suitable conditions, and its regeneration efficiency could achieve 94.8% after 5 times cycle.