Porous molecular sieve polymer composite with high CO2 adsorption efficiency and hydrophobicity

Greenhouse gases lead to frequent natural disasters, and CO 2 emissions from flue gases account for nearly half of anthropogenic CO 2 emissions. As an adsorbent, molecular sieves show excellent CO 2 adsorption; however, their defects limit their industrial application. To solve the problem of powder blockage and H 2 O absorption, we proposed the in-situ growth of molecular sieve in polyacrylate matrix beads to obtain molecular sieve composite for CO 2 capture in flue gas after combustion. Compared with those of pristine NaY, the CO 2 adsorption capacity of NaY@PA composite increased by 17.9 % and the H 2 O adsorption capacity decreased by 36.6 %. For further reduction in H 2 O absorption, post-modified composite NaY-ZIF@PA was synthesized by loading ZIF on NaY@PA surface to form a bilayer composite structure. The H 2 O absorption of NaY-ZIF@PA was reduced by 54.8 %, thus ensuring highly efficient CO 2 adsorption.