化工学报2015，Vol.66Issue(9)：3518-3528,11.DOI:10.11949/j.issn.0438-1157.20151059
CH4-N2 在 MOFs 结构材料中的吸附分离性能
Adsorption and separation of CH4-N2 with different structural MOFs
摘要
Abstract
For CH4-N2 separation with high-efficiency, several typical MOFs based on different ligands with high surface areas were synthesized in large scale via the simple solvothermal method, and their CH4/N2 separation performance was investigated experimentally by pure gas adsorption and binary gas breakthrough experiments. The results show that the adsorptive separation selectivity of most MOFs is much higher than that of Si/Al zeolites owing to their lower polarity, and the selectivity of MOFs with multidentate ligands are similar with that of high-quality activated carbon because their wide pore sizes resulted from the long linkers are not good for the separation of CH4/N2. In addition, the open metal sites in MOFs increase channel polarity, which is not conducive to improving the separation selectivity of CH4/N2 mixtures. Fortunately, the ultra-microporous adsorbent (0.5 nm) based on monodentate ligand, namely [Ni3(HCOO)6] synthesized by the short linker of HCOO? and Ni2+, has a much higher selectivity up to 7.0, twice that of conventional adsorbents, such as Si/Al zeolites and actvited carbons. In a word, the knowledge obtained in this work provides a foundation for the design of new nanoporous materials towards the CH4/N2 separation with high-efficiency.关键词
吸附/分离/甲烷/氮气/金属有机框架Key words
adsorptive/separation/methane/nitrogen/metal-organic framework分类
化学化工引用本文复制引用
胡江亮,孙天军,刘小伟,李德伏,赵生生,王树东..CH4-N2 在 MOFs 结构材料中的吸附分离性能[J].化工学报,2015,66(9):3518-3528,11.基金项目
国家自然科学基金项目(21476231).supported by the National Natural Science Foundation of China (21476231). （21476231）
