“…34,48 Linear PEI has some advantages over branched PEI, including higher CO 2 capacity, 48 faster kinetics and a lower heat of adsorption/desorption, 49 and better cyclic stability. 49,50 However, due to its extremely low availability and high cost, the application of linear PEI is significantly limited. PEI with low MW works better than that with high MW.…”