A new metal-organic framework that separates gases with ease
A new metal-organic framework that separates gases with ease
A new metal-organic framework that separates gases with ease
Researchers have discovered a new type of microporous metal-organic framework (MOF) that shows exceptional separation properties in the production of polymer-grade ethylene, an industrial chemical of great importance, although of expensive production.
According to this new study, the new MOF based on iron peroxide is the best material that has reports on the separation of ethane-ethylene and has great potential for industrial applications. Ethylene (C2H4) is a chemical product of great application and importance in the manufacture of numerous products, such as polyethylene plastics.
However, the widely used current method to obtain this chemical requires its separation from ethane (C2H6) through a process of cryogenic distillation, one of the most energy-intensive processes in the chemical industry.
The development of an ethylene-ethane separation process that is efficient in terms of costs and energy is highly anticipated and is among the most important to guarantee future energy-efficient industrial separation processes. Gas separation processes based on microporous materials, such as MOF, have proven to be a promising alternative to traditional ethylene-ethane separation methods.
However, many of these materials preferentially capture ethylene, which must then be separated from the MOF by additional processes. Furthermore, to achieve polymer grade purity levels (> 99.95%), multiple separation cycles are required, limiting their overall efficiency and profitability. Inspired by natural metalloenzymes that contain iron peroxide sites and preferentially bind to alkanes such as ethane, Libo Li and his colleagues have synthesized a similar MOF using Fe2 (O2) (dobdc) and evaluated their separation performance.
Li et al. they noticed that the material showed a strong preference for the union of ethane on ethylene. In addition, the authors show their ability to produce polymer grade ethylene (99.99%) from a single separation cycle under environmental conditions. The high efficiency of the ethane-ethylene separation was further validated by theoretical calculations, simulations and experiments. (Source: AAAS)
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