Design of Amine-Containing Nanoporous Materials for Postcombustion CO₂ Capture from Engineering Perspectives

Abstract

Conversion of primary amines in poly(ethylenimine) to hindered secondary amines signif icantly increased CO 2 adsorption kinetics, regenerability, and thermochemical stabilities under practical TSA conditions. • Min, K.; Choi, W.; Kim, C.; Choi, M. Oxidation-stable amine-containing adsorbents for carbon dioxide capture. Nat. Commun. 2018, 9, 726. 2 The oxidative stability of amine-containing adsorbents could be dramatically improved by adding small amounts of metal-binding reagents that can deactivate ppm-level metal impurities catalyzing amine oxidation. • Min, K.; Choi, W.; Kim, C.; Choi, M. Rational design of the polymeric amines in solid adsorbents for postcombustion carbon dioxide capture. ACS Appl. Mater. Interfaces 2018, 10, 23825−23833. 3 The energy demand for adsorbent regeneration strongly depends on the H 2 O coadsorption f rom humid f lue gas. From an energy perspective, suppressing H 2 O coadsorption may hold more signif icance than increasing the CO 2 capacity of the adsorbent. • Choi, W.; Park, J.; Kim, C.; Choi, M. Structural effects of amine polymers on stability and energy efficiency of adsorbents in post-combustion CO 2 capture. Chem. Eng. J. 2021, 408, 127289. 4 The ef fects of amine polymer structures on CO 2 adsorption capacity, kinetics, stability, and regeneration heat were systematically investigated.

Utilization of CO2-captured poly(allylamine) as a polymer surfactant for nanoarchitecture production in a closed CO2 cycle

“…Numerous systems for CO 2 absorption and desorption have been developed to improve CO 2 capacity, absorbent regenerability, cyclic stability and durability. These systems involve the use of physical 35–37 or chemical solvent dissolving absorbents, 38 solid absorbents, 39–41 gas separation membranes, 42–45 calcium looping 46,47 and inherent CO 2 trapping. 48 The chemical solvent-based systems are convenient, widely available, easily prepared and well-studied for CCS.…”