改性Cu-BTC基混合基质膜在CO2分离中的应用
Application of modified Cu-BTC-based mixed matrix membrane in CO2 separation
王涛 1高翔 2高继峰 3邓海全 3余显涌 4周振华 3唐玲 2吕航2
作者信息
- 1. 中国石油大学(北京)克拉玛依校区工学院,新疆 克拉玛依 834000;中石化中原石油工程设计有限公司技术发展中心,河南 郑州 451000
- 2. 中国石油大学(北京)克拉玛依校区工学院,新疆 克拉玛依 834000
- 3. 中石化中原石油工程设计有限公司技术发展中心,河南 郑州 451000
- 4. 中国石化天然气分公司重庆天然气销售中心,重庆 40002
- 折叠
摘要
金属-有机骨架材料(metal-organic frameworks,MOFs)作为一种有潜力的分离材料,其孔道结构独特,具有高度可调性和选择性,在膜分离领域具有广阔的应用前景.然而,MOFs在潮湿的环境下易损坏,这严重限制了其在膜分离领域的应用.因此,提高MOFs的水稳定性,是实现其在膜分离领域应用的重要问题之一.本文通过柠檬酸铵(ammonium citrate,AC)功能化制备了具有高水稳定性的Cu-BTC-AC填料,并将其与Pebax 1657聚合物共混制备了系列不同掺杂量的MMMs,并考察了25℃饱和水蒸气下所制备Cu-BTC-AC/Pebax膜的CO2/N2分离性能.与纯Pebax膜相比,本工作中制备的MMMs具有更优异的CO2渗透性和CO2/N2选择性,在CO2渗透通量为776.5GPU时CO2/N2选择性为46.7.此外,AC功能化改性赋予填料的高水稳定性使得本工作中制备的MMMs具备了应用于实际工业气体分离的潜力.
Abstract
As a potential separation material,metal-organic frameworks(MOFs)have its unique pore structure,high adaptability and selectivity,and have a broad application prospect in the field of membrane separation.However,MOFs are vulnerable to damage in humid environments,which severely limits their application in membrane separation.Therefore,improving the water stability of MOFs is one of the important problems in realizing its application in the field of membrane separation.In this paper,Cu-BTC-AC filler with high water stability was prepared by the functionalization of ammonium citrate and MMMs with different filler content were prepared by embedding the obtained Cu-BTC-AC in Pebax 1657 matrix.The CO2/N2 separation performance of the Cu-BTC-AC/Pebax MMMs at 25℃under humid condition was examined.Compared with the pure Pebax membrane,the prepared MMMs show improved CO2 permeability and CO2/N2 selectivity,with an optimized CO2 permeance of 776.5 GPU accompanied by the CO2/N2 selectivity of 46.7.Besides,the high water stability of the filler originated from AC functionalization endows the prepared MMMs with potential for application in practical industrial gas separations.
关键词
金属有机骨架/柠檬酸铵/水稳定性/混合基质膜/气体分离Key words
metal-organic framework/ammonium citrate/water-stability/mixed-matrix membrane/gas separation引用本文复制引用
基金项目
新疆维吾尔自治区自然科学基金青年科学基金(2022D01B146)
2024年克拉玛依市创新环境建设计划(创新人才)项目(2024hjcxyc0017)
出版年
2024
国家科技期刊平台
NSTL
万方数据