ABSTRACT

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°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°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/H₂ with high efficiency and stability.

摘要

采用交联丙烯酸聚合物钠盐、聚丙烯酸钠、聚乙烯醇和碳酸铯组成的复合聚合物制备高性能CO _{2分离膜。}通过改变相对湿度(RH)、温度、总压力(P _Total )和CO ₂分压(P _CO2 )来进行评估测试，以确定增强CO ₂相对于He的选择性渗透性能的最佳参数。_{该膜在50%RH、85℃下表现出较高的分离性能和耐久性，在P Total} :0.1 MPa和P _CO2条件下CO _{2 /He选择性超过550}：0.08兆帕。_{此外，在85℃、50％RH、 Ptotal}：0.7MPa、PCO2 _： 0.56MPa下评价膜的操作稳定性。制得的膜在分离性能评价试验中连续运行300 h保持稳定。本研究的结果表明，所开发的膜可用于从CO ₂ /H ₂等气体混合物中高效、稳定地分离CO _{2 。}