Selective CO2 permeation properties of a membrane composed of a three-component polymer blend and cesium carbonate

A high-performance CO2 separation membrane was fabricated using a composite polymer composed of a crosslinked acrylic acid polymer sodium salt, sodium polyacrylate, polyvinyl alcohol, and cesium carbonate. Evaluation tests were conducted by varying the relative humidity (RH), temperature, total pressure (P-total), and CO2 partial pressure (P-CO2) to determine optimal parameters for enhanced performance in selective CO2 permeation over He. The membrane shows a high separation performance and durability at 50% RH and 85 & DEG;C, where the CO2/He selectivity exceeds 550 under conditions of P-total:0.1 MPa and P-CO2:0.08 MPa. Furthermore, the operational stability of the membrane was evaluated at 85 & DEG;C, 50% RH, P-total:0.7 MPa, and P-CO2:0.56 MPa. The as-fabricated membrane was stable for 300 h of continuous operation in the separation performance evaluation test. The findings of this study suggest that the developed membranes can be applied for CO2 separation from gas mixtures such as CO2/H-2 with high efficiency and stability.

Automated summary

A high-performance CO2 separation membrane was developed using a composite polymer. The membrane exhibited high separation performance and durability under specific conditions, with CO2/He selectivity exceeding 550. Furthermore, the membrane demonstrated operational stability for 300 hours of continuous operation. These findings suggest that the developed membranes can efficiently and stably separate CO2 from gas mixtures.