【讲座题目】Porous materials to separate hydrogen from heavy hydrogen

【时 间】2024年6月24日 周一 上午10:30

【地 点】保定校区 动力工程系 教五楼102

【主讲人】张琳达，日本东北大学 材料科学高等研究所（WPI-AIMR）, 助理教授

【主讲人简介】

张琳达博士，现任日本东北大学 (Tohoku University) 材料科学高等研究所 (WPI-AIMR) 助理教授，从事可再生能源研究，特别是探索新型多孔材料在氢能源、气体分离、碳捕获和能源存储中的应用。博士就读于德国Max-Planck-Institute，于2020年获得博士学位，并在Nature Communications, Journal of the American Chemical Society, Angewandte Chemie, Science等高影响力期刊上发表了多篇论文。

【讲座内容简介】

Separating gaseous mixtures that consists of very similar particles is one of the most changeling issues in modern separation science and technology. Especially H2/D2 separation is a difficult task since the isotopes have identical size, shape and thermodynamic properties. Conventionally, H/D separation can be realized through cryogenic distillation or Girdler-sulfide process, however, the selectivity is less than 2.5 and these processes are intensive energy consuming, and therefore expensive. In nanoporous materials hydrogen isotopes can be separated by either confinement in small pores i.e. “Quantum Sieving” or by strong adsorption sites i.e. “Chemical Affinity Quantum Sieving”. Nanoporous materials can be tailored to achieve an optimum separation factor. In this talk for each sieving mechanism, an example is explicitly shown for customizing pore structures and adsorption sites. In porous organic cage molecules, the pore aperture can be adjusted by fine-tuning for optimum kinetic quantum sieving. Furthermore, crystal engineering allows to synthesize cocrystals of different organic cages increasing the selectivity and additionally improving the gas uptake. In zeolites, strong adsorption sites for hydrogen isotopes can be incorporated by ion exchange.  Here, zeolite Y with Ag(I) sites shows an improved separation selectivity combined with high gas uptake.