Porous materials to separate hydrogen from heavy hydrogen


【講座題目】Porous materials to separate hydrogen from heavy hydrogen

【時(shí) 間】2024年6月24日 周一 上午10:30

【地 點(diǎn)】保定校區 動(dòng)力工程系 教五樓102

【主講人】張琳達,日本東北大學(xué) 材料科學(xué)高等研究所(WPI-AIMR), 助理教授


張琳達博士,現任日本東北大學(xué) (Tohoku University) 材料科學(xué)高等研究所 (WPI-AIMR) 助理教授,從事可再生能源研究,特別是探索新型多孔材料在氫能源、氣體分離、碳捕獲和能源存儲中的應用。博士就讀于德國Max-Planck-Institute,于2020年獲得博士學(xué)位,并在Nature Communications, Journal of the American Chemical Society, Angewandte Chemie, Science等高影響力期刊上發(fā)表了多篇論文。


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.