An Effective Method to Improve the Performance of Fixed Carrier Membrane via Incorporation of C02-selective Adsorptive Silica Nanopartlcles

• Published in: 中国化学工程学报：英文版 Vol. 19; no. 5; pp. 821 - 832
• Main Author: 于型伟 王志 赵娟 袁芳 李诗纯 王纪孝 王世昌
• Format: Journal Article
• Language: English
• Published: 2011
• Subjects: CO2固定; 二氧化碳; 体膜; 反应选择性; 纳米二氧化硅; 纳米复合膜; 膜分离性能; 选择性吸附
• EISSN: 2210-321X
• ISSN: 1004-9541

Fixed carrier membrane exhibits attractive CO2 permeance and selectivity due to its transport mechanism of reaction selectivity （facilitated transport）. However, its performance needs improvement to meet cost targets for CO2 capture. This study attempts to develop membranes with multiple permselective mechanisms in order to enhance CO2 separation performance of fixed carder membrane. In this study, a novel membrane with multiplepermselective mechanisms of solubility selectivity and reaction selectivity was developed by incorporating CO2-selective adsorptive silica nanoparticles in situ into the tertiary amine containing polyamide membrane formed by interfacial polymerization （IP）. Various techniques were employed to characterize the polyamide and polyam-ide-silica composite membranes. The TGA result shows that nanocomposite membranes exhlbit superior-thermal stability than pure polyamide membranes. In addition, gas permeation experiments show that both nanocomposite membranes have larger CO2 permeance than pure polyamide membranes. The enhanced CO2/N2 separation performance for nanocomposite membranes is mainly due to the thin film thickness, and multiple permselective mechanisms of solubility selectivity and reaction selectivity.