Ship-in-a-bottle synthesis of amine-functionalized ionic liquids in NaY zeolite for CO(2) capture

CO(2) capture on solid materials possesses significant advantages on the operation cost, process for large-scale CO(2) capture and storage (CCS) that stimulates great interest in exploring high-performance solid CO(2) adsorbents. A ship-in-a-bottle strategy was successfully developed to prepare the [APMIM]Br@NaY host–guest system in which an amine-functionalized ionic liquid (IL), 1-aminopropyl-3-methylimidazolium bromide ([APMIM]Br), was in-situ encapsulated in the NaY supercages. The genuine host-guest systems were thoroughly characterized and tested in CO(2) capture from simulated flue gas. It was evidenced the encapsulated ILs are more stable than the bulk ILs. These host–guest systems exhibited superb overall CO(2) capture capacity up to 4.94 mmol g(−1) and the chemically adsorbed CO(2) achieved 1.85 mmol g(−1) depending on the [APMIM]Br loading amount. The chemisorbed CO(2) can be desorbed rapidly by flushing with N(2) gas at 50°C. The optimized [APMIM]Br@NaY system remains its original CO(2) capture capacity in multiple cycling tests under prolonged harsh adsorption-desorption conditions. The excellent physicochemical properties and the CO(2) capture performance of the host-guest systems offer them great promise for the future practice in the industrial CO(2) capture.