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

Y Aminopolycarboxylate ILs (APC-ILs)-a kind of anion-grafted amine-functionalized ILs enabling 1:2 stoichiometry of reaction with CO2-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 CO2 from dilute source, with the highest CO2 capacity of 1.65 mmol/g and IL utilization ratio of 1.53 mol/mol at 30 degrees C for 10 vol% of CO2 balanced in N-2. The CO2 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 CO2 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. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

Dispersing APC-ILs in PDVB is an effective approach to obtain adsorbents with high efficiency and improved performance for carbon capture from dilute sources, showing superior adsorption capacity and selectivity.