The　CO2　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-Al2O3　(MA)　using　ultrasonic　immersion　method.　The　prepared　adsorbents　were　characterized　by　FT-IR,　1H　NMR,　EA,　TGA,　SEM,　XRD,　BET　and　TEM,　indicating　the　successful　synthesis　of　the　desired　PILs/MA.　The　CO2　adsorption　capacity　was　investigated　under　different　loading　ratios,　temperatures,　pressures　and　CO2　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　CO2　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.　©　2019