多变体多晶金属有机框架膜用于CO2/CH4分离
Weidong Fan1, Yunpan Ying1, Shing Bo Peh1
1Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585 Singapore.
Journal of the American Chemical Society
|October 5, 2021
概括
这项研究引入了用于天然气分离的先进MIL-160膜,为CO2/CH4提供了更好的选择性和透性. 与传统的胺-34膜相比,这些新型膜对水分和碳化合物具有更强的抗性.
科学领域:
- 材料科学
- 化学工程
- 分离技术
背景情况:
- 膜技术可以节能地分离天然气.
- 微孔无机膜如氨酸-34 (SAPO-34) 是有前途的,但受到水分和碳化合物吸附的影响.
- 开发耐污染物强大的膜对于工业天然气加工至关重要.
研究的目的:
- 制造和描述一种用于天然气分离的新型MIL-160膜.
- 通过网状化学研究孔径大小和连接体功能对膜性能的影响.
- 评估功能化的MIL-160/CAU-10-F膜的性能,并与现有的SAPO-34膜进行比较.
主要方法:
- 在Al2O3基板上的多晶MIL-160膜的现场热水合成.
- 用功能化的MIL-160/CAU-10-F膜的制造.
- 气体分离性能测试,包括CO2/CH4选择性和CO2透度测量.
- 评估膜对水蒸气和碳化合物的耐受性.
主要成果:
- 一个厚度为3μm的MIL-160膜,具有显著的分子选效果,已成功制造.
- 网络化学允许精确控制MIL-160膜的孔径和环境.
- 与MIL-160相比,化MIL-160/CAU-10-F膜的CO2/CH4选择性增加了10.7%,CO2透率增加了31.2%.
- 两种MIL-160和MIL-160/CAU-10-F膜都表现出比SAPO-34膜对水蒸气和碳化合物的更强的抵抗力.
结论:
- 通过网状化学,MIL-160膜具有可调节的天然气分离效果.
- 功能化提高了CO2/CH4分离性能和CO2透率.
- 这些新型疏水膜在污染物存在时提供了更好的稳定性和性能,优于水友性SAPO-34膜.
相关概念视频
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