• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Microporous sol-gel derived aminosilicate membrane for enhanced carbon dioxide separation
【24h】

Microporous sol-gel derived aminosilicate membrane for enhanced carbon dioxide separation

机译：微孔溶胶-凝胶衍生的氨基硅酸盐膜可增强二氧化碳分离

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new aminosilicate,sol-gel derived microporous inorganic membrane has been developed for enhanced CO_2 separation in applications such as removal of metabolic CO_2 from the breathing loop of the NASA extravehicular mobility unit (EMU),natural gas purification,or CO_2 capture from coal-fired power plant emissions.This membrane consists of an inorganic,amorphous silica matrix of pore size 4-5 A,containing randomly dispersed amine (-NH_2) functional groups in order to enhance its CO_2 selectivity,due to preferential adsorption of CO_2 in the membrane pore walls and simultaneous blocking of permeation of other gases (O_2,N_2 and CH_4).It is found that the gas feed condition during permeation (partial pressure of CO_2,relative humidity),post-synthetic treatments and aging,affect significantly the separation performance of the membranes.At this stage of development,with feeds of 1-20 vol.% CO_2 and 0-40% relative humidity at 22degC,the highest CO_2:N_2 separation factor was in the range 100-200,while the CO_2 permeance was in the range 0.1-1.5 cm~3 (STP)/(cm~2 minatm).The results suggest that controlling the membrane pore size and method of activation of amine groups are the most critical factors for improving the CO_2-permselectivity of the membrane.
机译：已开发出一种新的氨基硅酸盐，溶胶-凝胶衍生的微孔无机膜，用于增强CO_2分离，其应用包括从NASA车外流动单元（EMU）的呼吸回路中去除代谢CO_2，天然气净化或从煤中捕集CO_2。该膜由孔径为4-5 A的无机无定形二氧化硅基质组成，含有随机分散的胺（-NH_2）官能团，以提高其对CO_2的选择性，这是因为膜中优先吸收了CO_2孔壁和同时阻止其他气体（O_2，N_2和CH_4）的渗透。发现渗透过程中的气体进料条件（CO_2的分压，相对湿度），合成后处理和老化会显着影响分离性能。在此开发阶段，在22℃下进料1-20体积％CO_2和0-40％相对湿度的情况下，最高的CO_2：N_2分离系数在100范围内-200，而CO_2渗透率在0.1-1.5 cm〜3（STP）/（cm〜2 minatm）范围内。结果表明，控制膜孔径和胺基团的活化方法是影响膜的最关键因素。改善了膜的CO_2渗透选择性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号