一种微孔 (Zn) (ted) ,具有超高的乙吸收,用于有效的选择性吸附和轻碳化合物的分离
1School of Environment and Chemical Engineering, Foshan University, Foshan 528000, China.
Molecules (Basel, Switzerland)
|August 26, 2023
概括
一种新的金属有机框架,Zn{bdc}{ted) 0.5,在天然气提升过程中有效地将乙 (C2H6) 和甲 (CH4) 等轻碳化合物分离出来. 这种材料具有很高的选择性和吸附能力,超过了现有的选择.
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.
- 吸附科学 吸附科学
背景情况:
- 从甲中分离轻碳化合物 (乙,,) 对于天然气升级至关重要,但在技术上具有挑战性.
- 微孔金属有机框架 (MOF) 为选择性气体吸附提供可调节的特性.
研究的目的:
- 为了合成和表征一种新型的MOF,Zn{bdc}{ted}0.5,用于从甲中分离轻碳化合物.
- 为了评估Zn0.5的吸附性能和选择性,用于C2-4/C1分离.
主要方法:
- 使用PXRD,SEM,TGA和孔隙性分析合成和表征Zn{bdc}{ted}0.5.
- 对CH4,C2H6,C3H8和C4H10的吸附异热的测量.
- 使用IAST和分子模拟计算同质吸附热量和预测选择性的计算.
主要成果:
- 0.5具有较高的BET表面积 (1904 m2/g) 和孔隙体积 (0.73 cm3/g).
- 异常的C2H6吸附能力 (4.9 mmol/g) 与最小的CH4吸收 (0.4 mmol/g) 在298K和100kPa.
- 获得的高选择性:C4H10/CH4 (180),C3H8/CH4 (67) 和C2H6/CH4 (13) 在100kPa.
结论:
- 与大多数报告的MOF相比,Zn ((bdc) ((ted) 0.5在轻碳化合物分离方面表现出优异的性能.
- 该材料对具有更丰富C-H键和更高极化性的碳化合物的亲和力推动了选择性吸附.
- Zn ((bdc) ((ted) 0.5显示了高效的天然气升级应用的巨大潜力.
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