Zheng et al. (2025): In-situ amine modification of porous polymer/silica spiral wound module for CO2 capture from ambient air
Rongrong Zheng, Mengyao Jiang, Yanfang Fan IN: Chemical Engineering Journal, https://doi.org/10.1016/j.cej.2025.161078
Herein, the authors demonstrate a flexible membrane solid amine adsorbent based on cellulose acetate/silica composite supports that is fabricated into a spiral wound module functioning as a gas–solid contactor, presenting reduced pressure drop and comparable adsorption capacities with powdery solid amine materials. First, the phase inversion method is utilized to prepare cellulose acetate/silica membrane support, where the doping amount of silic varies from 60 wt% to 80 wt%. After assembling the support into a spiral module, poly (ethyleneimine) (PEI) is loaded in the module via an in-situ amine impregnation method, that the amine solution flows into the module which could reduce the support mass loss encountered in the conventional static impregnation method.