用素修饰的金属有机框架,用于有效地从天然气中分离基
Zhirong Song1, Yanchun Zheng1, Yiqi Chen1
1Institute of Functional Porous Materials, The Key laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China. jkgao@zstu.edu.cn.
改性金属有机框架 (MOFs) 显示出将有价值的碳化合物从天然气中分离的潜力. DMOF-Cl对乙和具有很高的吸附能力和选择性,这对于能源应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 能源科学 能源科学
背景情况:
- 天然气是重要的能源,但分离有价值的成分,如乙 (C2H6) 和 (C3H8) 提出了重大挑战.
- 金属有机框架 (MOF) 是具有可调节结构的先进多孔材料,具有高效气体吸附和分离的潜力.
研究的目的:
- 合成和研究素改性柱层MOFs (Ni(BDC) ((DABCO) 0.5或DMOF-X) 对于它们在分离甲 (CH4),乙 (C2H6) 和 (C3H8) 的性能.
- 评估这些MOF对天然气分离中的关键组件的吸附能力和选择性.
主要方法:
- 合成基修饰的MOF (DMOF-X,其中X=F,Cl,Br).
- 在特定的温度 (298 K) 和压力 (100 kPa) 条件下进行了气体吸附和分离实验.
- 对CH4/C2H6/C3H8混合物的吸附能力和选择性的评估.
主要成果:
- 在298K和100kPa时,DMOF-Cl对 (6.23 mmol g-1) 和乙烯 (4.94 mmol g-1) 的吸附能力异常高.
- 在特定的混合比率中,DMOF-Cl对C3H8/CH4 (130.9) 和C2H6/CH4 (12.5) 具有很高的选择性.
- 对于这些分离,DMOF-Cl的性能超过了之前报告的大多数多孔材料.
结论:
- 素修饰,特别是,显著提高了柱层MOF的吸附性能,用于C2H6和C3H8的分离.
- 作为一种吸附剂,DMOF-Cl显示出相当大的潜力,可以有效地从天然气中分离C3H8,C2H6和CH4.
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