Dispersing aminopolycarboxylate ionic liquids in mesoporous organic polymer for highly efficient and improved carbon capture from dilute source

Aminopolycarboxylate ILs (APC-ILs)—a kind of anion-grafted amine-functionalized ILs enabling 1:2 stoichiometry of reaction with CO 2 —were dispersed in mesoporous organic polymer to achieve a new class of adsorbents. The mesoporous organic polymer selected herein is polydivinylbenzene (PDVB) that can be facilely synthesized by a solvothermal route without any templates. The prepared APC-IL@PDVB samples were then systematically characterized and investigated for carbon capture performance. It is found that APC-IL@PDVB samples can efficiently adsorb CO 2 from dilute source, with the highest CO 2 capacity of 1.65 mmol/g and IL utilization ratio of 1.53 mol/mol at 30 ℃ for 10 vol% of CO 2 balanced in N 2 . The CO 2 capacities of APC-IL@PDVB samples surpass the values of most other solid-dispersed ILs, and the IL utilization ratios surpass the values of most non-dispersed ILs. The adsorption of CO 2 by APC-IL@PDVB samples is also highly selective towards N 2 , and reversible throughout consecutive adsorption-desorption cycles. Therefore, dispersing APC-ILs in PDVB is an effective approach to obtain adsorbents with high efficiency and improved performance for carbon capture from dilute source.