Tailored Gas Separation Membranes Through Selective Charge-Transfer Complex Formation

通过选择性电荷转移复合物形成定制气体分离膜

• 批准号: 9308258
• 负责人: Timothy Barbari
• 金额: $ 2万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9308258&HistoricalAwards=false
• 关键词: Tailored; Gas; Separation; Membranes; Through

CTS-9308258 Johns Hopkins University Timothy A. Barbari ABSTRACT A new approach to improve polymeric membranes for gas separation will be explored in this project. Rather than synthesizing membranes of new materials or new composite structures, chemical modification to form charge-transfer complexes in various membrane polymers in current use is to be evaluated as a means of augmenting their gas separation properties. Bromination of nucleophilic sites alters the free volume and free volume distribution in polymers so that molecular diffusivity increases and selectivity changes. Permeabilities of CO2 and CH4 through a treated polysulfone film will be measured and compared with the untreated material. Growth in membrane sales for the next few years has been estimated at 12-15%. A large portion of this market is in gas separations to produce commercially important gaseous materials including the removal of carbon dioxide from natural gas and the separation of pure oxygen.

CTS-9308258约翰霍普金斯大学Timothy A. Barbari 摘要 本计画将探讨一种改善气体分离用高分子膜之新方法。 而不是合成新材料或新的复合结构的膜，在目前使用的各种膜聚合物中形成电荷转移复合物的化学改性将被评估为增强其气体分离性能的手段。 亲核位点的溴化改变聚合物中的自由体积和自由体积分布，使得分子扩散系数增加并且选择性改变。 将测量CO2和CH 4通过经处理的聚砜膜的渗透性，并与未经处理的材料进行比较。 未来几年膜销售的增长估计为12- 15%。 该市场的很大一部分是气体分离，以生产商业上重要的气体材料，包括从天然气中除去二氧化碳和分离纯氧。