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Ethylene/ethane separation in a stable hydrogen-bonded organic framework through a gating mechanism
时间:2021-10-08 14:47:01
作品信息

期刊

Nature Chemistry

标题

Ethylene/ethane separation in a stable hydrogen-bonded organic framework through a gating mechanism

作者

Yisi Yang, Libo Li, Rui-Biao Lin, Yingxiang Ye, Zizhu Yao, Ling Yang, Fahui Xiang, Shimin Chen, Zhangjing Zhang, Shengchang Xiang, Banglin Chen 

摘要

Porous materials are very promising for the development of cost- and energy-efficient separation processes, such as for the purification of ethylene from ethylene/ethane mixture—an important but currently challenging industrial process. Here we report a microporous hydrogen-bonded organic framework that takes up ethylene with very good selectivity over ethane through a gating mechanism. The material consists of tetracyano-bicarbazole building blocks held together through intermolecular CN···H–C hydrogen bonding interactions, and forms as a threefold-interpenetrated framework with pores of suitable size for the selective capture of ethylene. The hydrogen-bonded organic framework exhibits a gating mechanism in which the threshold pressure required for guest uptake varies with the temperature. Ethylene/ethane separation is validated by breakthrough experiments with high purity of ethylene (99.1%) at 333 K. Hydrogen-bonded organic frameworks are usually not robust, yet this material was stable under harsh conditions, including exposure to strong acidity, basicity and a variety of highly polar solvents.

原文链接

https://www.nature.com/nchem/volumes/13/issues/10

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