一个微孔的与结合的有机框架,用于高效的/分离
Yu-Bo Wang1, Yu-Xin Lin1, Jia-Xin Wang1
1State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
研究人员开发了新的多孔结有机框架 (HOFs),以有效地分离/. ZJU-HOF-62表现出优异的结和选择性,使高纯度能有效生产.
科学领域:
- 材料科学
- 化学工程
- 超分子化学
背景情况:
- / (C3H8/C3H6) 的分离对于生产高纯度至关重要.
- 现有的方法缺乏能源效率,并且由于C3H8结合点不足,多孔的有机框架 (HOF) 尚未得到充分探索.
- 网状化学提供了调整毛孔大小和功能的策略,但由于H键较弱,在HOF中具有挑战性.
研究的目的:
- 实施网状化学设计和合成新型HOF以实现高效的C3H8/C3H6分离.
- 系统地设计HOF中的孔径和功能部位,以增强C3H8结合的偏好.
- 通过节能分离实现高纯度的生产.
主要方法:
- 使用四个四碳酸连体合成一系列异构HOF (ZJU-HOF-59ZJU-HOF-62).
- 孔径大小和HOF结构中的功能部位的系统工程.
- 在298K和1bar的吸附和选择性测量,理论计算和动态突破实验.
主要成果:
- 成功合成了四种具有可调节的C3H8与C3H6结合偏好的异构型HOF.
- ZJU-HOF-62表现出最高的C3H8吸收 (146.8cm3g-1) 和C3H8/C3H6选择性 (1.53),显示出反向分离.
- 理论计算证实C3H8与HOF的dialkynyl/carboxylic位点之间的相互作用较强.
- 动态突破性实验显示ZJU-HOF-62的最大C3H6生产率为12.1Lkg-1的实际气体混合物.
结论:
- 该研究成功地证明了网状化学在设计HOF中具有挑战性的C3H8/C3H6分离的应用.
- ZJU-HOF-62是一种高效的吸附剂,用于选择性吸收和净化.
- 这项工作为工业气体分离开发先进的多孔材料开辟了新的途径.
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